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  • English  (40)
  • 2010-2014  (40)
  • Ravallion, Martin  (24)
  • Lederman, Daniel  (16)
  • Washington, D.C : The World Bank  (40)
  • Dordrecht : Springer Netherlands
  • Oxford : Oxford University Press
  • [Erscheinungsort nicht ermittelbar] : IntechOpen
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  • 1
    Language: English
    Pages: 1 Online-Ressource (30 p)
    Series Statement: World Bank E-Library Archive
    Parallel Title: Erscheint auch als Lederman, Daniel Export Shocks and the Volatility of Returns to Schooling: Evidence from Twelve Latin American Economies
    Abstract: This paper builds on previous studies to uncover evidence suggesting that cyclical fluctuations in returns to schooling are determined by fluctuations in foreign demand, which tend to be positively correlated with returns to schooling. The effec
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  • 2
    Language: English
    Pages: 1 Online-Ressource (58 p)
    Series Statement: World Bank E-Library Archive
    Parallel Title: Erscheint auch als Artuç, Erhan The Rise of China and Labor Market Adjustments in Latin America
    Abstract: This paper assesses the impact of the rise of China on the trade of Latin American and Caribbean economies. The study proposes an index to measure the impact on trade, which suggests sizable effects, especially in Argentina, Brazil, Chile, Hondu
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  • 3
    Language: English
    Pages: Online-Ressource (41 p)
    Edition: 2014 World Bank eLibrary
    Parallel Title: Lederman, Daniel The Price is Not Always Right
    Abstract: This paper provides an overview of the impact of once-and-for-all changes in commodity prices and other prices on household welfare. It begins with a collection of stylized facts related to commodities based on household survey data from Latin America and Africa. The data uncover strong commodity dependence in both continents: households typically allocate a large fraction of their budget to commodities and they often depend on commodities to earn their income. This income and expenditure dependency suggests sizable impacts and adjustments following commodity-price shocks. The paper explores these effects with a review of the literature. It studies consumption and income responses, labor-market responses, and spillovers across sectors. It ends up providing evidence on the relative magnitudes of various mechanisms through which commodity prices affect household (and national) welfare in developing economies
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  • 4
    Language: English
    Pages: Online-Ressource (42 p)
    Edition: 2014 World Bank eLibrary
    Parallel Title: Hollweg, Claire H Structural Reforms and Labor Market Outcomes
    Abstract: This paper explores the impact of structural reforms on a comprehensive set of macro-level labor-market outcomes, including the unemployment rate, the average wage index, and overall and female employment levels and labor force participation rates. Together these outcome variables capture the overall health of the labor market and the aggregate welfare of workers. Yet, there seems to be no other comprehensive empirical investigation in the existing literature of the impact of structural reforms at the cross-country macro level on labor-market outcomes other than the unemployment rate. Data were collected from a variety of sources, including the World Bank World Development Indicators, the International Monetary Fund International Financial Statistics, and the International Labor Organization Key Indicators of the Labor Market. The resulting dataset covers up to 88 countries, the majority being developing, for 10 years on either side of structural reforms that took place between 1960 and 2001. After documenting the average trends across countries in the labor-market outcomes up to 10 years on either side of each country's structural reform year, the authors run fixed-effects ordinary least squares as well as instrumental variables regressions to account for the likely endogeneity of structural reforms to labor-market outcomes. Overall the results suggest that structural reforms lead to positive outcomes for labor. Unlike related literature, the paper does not find conclusive evidence on unemployment. Redistributive effects in favor of workers, along the lines of the Stolper-Samuelson effect, may be at work
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  • 5
    Language: English
    Pages: Online-Ressource (31 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Ravallion, Martin Benefit Incidence with Incentive Effects, Measurement Errors and Latent Heterogeneity
    Abstract: Empirical studies of tax and benefit incidence routinely ignore behavioral responses and measurement errors. This paper offers an econometric method of estimating the mean benefit withdrawal rate (marginal tax rate) allowing for incentive effects, measurement errors, and correlated latent heterogeneity in incidence. Under the method's identifying assumptions, a feasible instrumental variables estimator corrects for incentive effects and measurement errors, and provides a bound for the true value when there is correlated incidence heterogeneity. A case study for a large cash transfer program in China indicates that past methods of assessing benefit incidence using either nominal official rates or raw tabulations from survey data are deceptive. The program entails a nominal 100 percent benefit withdrawal rate-a poverty trap. However, the paper finds that the actual rate is much lower, and clearly too low in the light of the literature on optimal income taxation. The paper discusses likely reasons based on the qualitative observations
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  • 6
    Language: English
    Pages: Online-Ressource (53 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Artuç, Erhan A Mapping of Labor Mobility Costs in Developing Countries
    Abstract: Estimates of labor mobility costs are needed to assess the responses of employment and wages to trade shocks when factor adjustment is costly. Available methods to estimate those costs rely on panel data, which are seldom available in developing countries. The authors propose a method to estimate mobility costs using readily obtainable data worldwide. The estimator matches the changes in observed sectoral employment allocations with the predicted allocations from a model of costly labor adjustment. This paper estimates a world map of labor mobility costs and uses those estimates to explore the response of labor markets to trade policy
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  • 7
    Language: English
    Pages: Online-Ressource (40 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Ravallion, Martin Can Subjective Questions on Economic Welfare be Trusted?
    Abstract: While self-assessments of welfare have become popular for measuring poverty and estimating welfare effects, the methods can be deceptive given systematic heterogeneity in respondents' scales. Little is known about this problem. This study uses specially-designed surveys in three countries, Tajikistan, Guatemala, and Tanzania, to study scale heterogeneity. Respondents were asked to score stylized vignettes, as well as their own household. Diverse scales are in evidence, casting considerable doubt on the meaning of widely-used summary measures such as subjective poverty rates. Nonetheless, under the identifying assumptions of the study, only small biases are induced in the coefficients on widely-used regressors for subjective poverty and welfare
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  • 8
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (26 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Quy-Toan Do Trade Insulation as Social Protection
    Abstract: In a world with volatile food prices, countries have an incentive to shelter their populations from induced real income shocks. When some agents are net food producers while others are net consumers, there is scope for insurance between the two groups. A domestic social protection scheme would therefore transfer resources away from the former group to the latter in times of high food prices, and do the reverse otherwise. This paper shows that in the presence of consumer preference heterogeneity, implementing the optimal social protection policy can potentially induce higher food price volatility. Such policy indeed generates a counter-cyclical demand shock that amplifies the effects of the underlying food shortage. The results call for a reassessment of food stabilization policies. In particular, the authors urge caution against the systematic condemnation of trade insulation practices
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  • 9
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (24 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Ravallion, Martin How Long Will it Take to Lift One Billion People Out of Poverty?
    Abstract: Alternative scenarios are considered for reducing by one billion the number of people living below
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  • 10
    Language: English
    Pages: Online-Ressource (45 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Fernandes, Ana M Export Entrepreneurship and Trade Structure in Latin America during Good and Bad Times
    Abstract: The authors use a new dataset on export transactions for a large set of Latin American and Caribbean and comparator countries to assess the extent of "export entrepreneurship" during periods of fast export growth (2005-2007) and depressed external demand (2008-2009). Export entrepreneurship is equated with the extensive margin of exports, namely the advent of new exporting firms, new export products, and new export market destinations. The main findings are: (1) annual exporter entry, exit, and survival rates in Latin America and the Caribbean are quite similar to what is observed in other countries, and entry rates across sectors are quite similar but survival rates appear to be highest in agriculture; (2) the relative size of entrants into export markets (relative to incumbents) tended to be lower for natural resource-abundant countries during 2005-2007, but less so during the crisis years of 2008-2009; (3) entry rates tend to be lower in sectors in which a country has revealed comparative advantage, however, exit rates and survival rates of new exporters are higher in those sectors; and (4) the low growth of exports during the global recession of 2008-2009 in Latin America and the Caribbean was due to lower growth in exports of incumbent firms' pre-existing products and destinations, while new products and destinations tended to attenuate the recession's effects. Overall, the data suggest that the Latin American and Caribbean region appears to be no less entrepreneurial in terms of the extensive margins of exports than comparator countries
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  • 11
    Language: English
    Pages: Online-Ressource (31 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Ravallion, Martin Testing Information Constraints on India's Largest Antipoverty Program
    Abstract: Public knowledge about India's ambitious Employment Guarantee Scheme is low in one of India's poorest states, Bihar, where participation is also unusually low. Is the solution simply to tell people their rights? Or does their lack of knowledge reflect deeper problems of poor people's agency and an unresponsive supply side? This paper reports on an information campaign that was designed and implemented in the form of an entertaining movie to inform people of their rights under the scheme. In randomly-assigned villages, the movie brought significant gains in knowledge and more positive perceptions about the impact of the scheme. But objectively measured employment showed no gain on average, suggesting that the movie created a "groupthink," changing social perceptions about the scheme but not individual efficacy in accessing it. The paper concludes that awareness generation needs to go hand-in-hand with supply-side changes
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  • 12
    Language: English
    Pages: Online-Ressource (36 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Arias, Javier Trade, Informal Employment and Labor Adjustment Costs
    Abstract: Informal employment is ubiquitous in developing countries, but few studies have estimated workers' switching costs between informal and formal employment. This paper builds on the empirical literature grounded in discrete choice models to estimate these costs. The results suggest that inter-industry labor mobility costs are large, but entry costs into informal employment are significantly lower than the costs of entry in formal employment. Simulations of labor-market adjustments caused by a trade-related fall in manufacturing goods prices indicate that the share of informally employed workers rises after liberalization, but this is due to entry into the labor market by previously idle labor
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  • 13
    Language: English
    Pages: Online-Ressource (44 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Murgai, Rinku Is Workfare Cost-Effective against Poverty in a Poor Labor-Surplus Economy?
    Abstract: Workfare schemes impose work requirements on beneficiaries. This has seemed an attractive idea for self-targeting transfers to poor people. This incentive argument does not imply, however, that workfare is more cost-effective against poverty than even poorly-targeted options, given hidden costs of participation. In particular, even poor workfare participants in a labor-surplus economy can be expected to have some forgone income when they take up such a scheme. A survey-based method is used to assess the cost-effectiveness of India's Employment Guarantee Scheme in Bihar. Participants are found to have forgone earnings, although these fall well short of market wages on average. Factoring in these hidden costs, the paper finds that for the same budget, workfare has less impact on poverty than either a basic-income scheme (providing the same transfer to all) or uniform transfers based on the government's below-poverty-line ration cards. For workfare to dominate other options, it would have to work better in practice. Reforms would need to reduce the substantial unmet demand for work, close the gap between stipulated wages and wages received, and ensure that workfare is productive-that the assets created are of value to poor people. Cost-effectiveness would need to be reassessed at the implied higher levels of funding
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  • 14
    Language: English
    Pages: Online-Ressource (54 p)
    Edition: 2013 World Bank eLibrary
    Parallel Title: Van de Walle, Dominique Long-Term Impacts of Household Electrification in Rural India
    Abstract: India's huge expansion in rural electrification in the 1980s and 1990s offers lessons for other countries today. The paper examines the long-term effects of household electrification on consumption, labor supply, and schooling in rural India over 1982-99. It finds that household electrification brought significant gains to consumption and earnings, the latter through changes in market labor supply. It finds positive effects on schooling for girls but not for boys. External effects are also evident, whereby households without electricity benefit from village electrification. Wage rates were unaffected. Methodologically, the results suggest sizeable upward biases in past estimates of the gains from electrification associated with how past analyses dealt with geographic effects
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  • 15
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (24 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Ravallion, Martin Can We Trust Shoestring Evaluations?
    Abstract: Many more impact evaluations could be done, and at lower unit cost, if evaluators could avoid the need for baseline data using objective socio-economic surveys and rely instead on retrospective subjective questions on how outcomes have changed, asked post-intervention. But would the results be reliable? This paper tests a rapid-appraisal, "shoestring," method using subjective recall for welfare changes. The recall data were collected at the end of a full-scale evaluation of a large poor-area development program in China. Qualitative recalls of how living standards have changed are found to provide only weak and biased signals of the changes in consumption as measured from contemporaneous surveys. Importantly, the shoestring method was unable to correct for the selective placement of the program favoring poor villages. The results of this case study are not encouraging for future applications of the shoestring method, although similar tests are needed in other settings
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  • 16
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (42 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Shaohua Chen More Relatively-Poor People in a Less Absolutely-Poor World
    Abstract: Relative deprivation, shame and social exclusion can matter to the welfare of people everywhere. The authors argue that such social effects on welfare call for a reconsideration of how we assess global poverty, but they do not support standard measures of relative poverty. The paper argues instead for using a weakly-relative measure as the upper-bound complement to the lower-bound provided by a standard absolute measure. New estimates of global poverty are presented, drawing on 850 household surveys spanning 125 countries over 1981-2008. The absolute line is
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  • 17
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (33 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Ravallion, Martin Benchmarking Global Poverty Reduction
    Abstract: Against what standards should we judge the developing world's overall performance against poverty going forward? The paper proposes two measures, each with both "optimistic" and "ambitious" targets for 2022, 10 years from the time of writing. The first measure is absolute consumption poverty, as judged by what "poverty" means in the poorest countries. The second is a new relative poverty measure, embracing social inclusion needs consistently with national poverty lines. The optimistic benchmark would entail an absolute poverty rate of 9 percent in 2022, and a relative poverty rate of 40 percent. The more ambitious targets would bring the absolute rate down to 3 percent and the relative rate to 33 percent. The optimistic target would maintain the (impressive) progress against poverty of the last 20 years, without global crises to stall that progress. The ambitious target would require about a 1 percentage point higher growth rate for the gross domestic product of the developing world, as long as this did not come with a reduction in the household sector's share or any further increase in overall inequality after its level in 2008. Alternatively, the 3 percent target could be reached at currently expected growth rates but at the lower level of inequality in 1999
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  • 18
    Language: English
    Pages: Online-Ressource (39 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Ravallion, Martin Poor, or Just Feeling Poor?
    Abstract: The challenges faced in calibrating poverty and welfare measures to objective data have long been recognized. Until recently, most economists have resisted a seemingly obvious solution, namely to ask people themselves: "Do you feel poor?" The paper studies the case for and against this approach. It is argued that, while one would not want to use self-assessments as welfare metrics in their own right, there is scope for using such data to help calibrate multidimensional measures. Indeed, the idea of a "social subjective poverty line" (below which people tend to think they are poor, but above which they do not) is arguably the most conceptually appealing way of defining poverty. However, the paper points to a number of concerns that have received insufficient attention, including the choice of covariates, survey design issues, measurement errors, frame-of-reference effects, and latent heterogeneity in personality traits and personal tradeoffs. Directions for future research are identified
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  • 19
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (38 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Brückner, Markus Trade Causes Growth in Sub-Saharan Africa
    Abstract: In the 1990s the mainstream consensus was that trade causes growth. Subsequent research shed doubt on the consensus view, as evidence suggested that the identification of the effect of trade on growth was problematic in the existing literature. This paper contributes to this debate by focusing on growth in Sub-Saharan Africa. It estimates the effect of openness to international trade on economic growth with panel data. Employing instrumental variables techniques that correct for endogeneity bias, the empirical evidence suggests that within-country variations in trade openness cause economic growth: a 1 percentage point increase in the ratio of trade over gross domestic product is associated with a short-run increase in growth of approximately 0.5 percent per year; the long-run effect is larger, reaching about 0.8 percent after ten years. These results are robust to controlling for country and time fixed effects as well as political institutions
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  • 20
    Language: English
    Pages: Online-Ressource (34 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Dutta, Puja Does India's Employment Guarantee Scheme Guarantee Employment?
    Abstract: In 2005 India introduced an ambitious national anti-poverty program, now called the Mahatma Gandhi National Rural Employment Guarantee Scheme. The program offers up to 100 days of unskilled manual labor per year on public works projects for any rural household member who wants such work at the stipulated minimum wage rate. The aim is to dramatically reduce poverty by providing extra earnings for poor families, as well as empowerment and insurance. If the program worked in practice the way it is designed, then anyone who wanted work on the scheme would get it. However, analysis of data from India's National Sample Survey for 2009/10 reveals considerable un-met demand for work in all states. The authors confirm expectations that poorer families tend to have more demand for work on the scheme, and that (despite the un-met demand) the self-targeting mechanism allows it to reach relatively poor families and backward castes. The extent of the un-met demand is greater in the poorest states-ironically where the scheme is needed most. Labor-market responses to the scheme are likely to be weak. The scheme is attracting poor women into the workforce, although the local-level rationing processes favor men
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  • 21
    Language: English
    Pages: Online-Ressource (54 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Kaplan David S What Drives Short-Run Labor Market Volatility in Offshoring Industries?
    Abstract: Recent research shows that employment in Mexico's offshoring maquiladora industries is twice as volatile as employment in their U.S. industry counterparts. The analyses in this paper use data from Mexico's social security records and U.S. customs between the first quarter of 2007 and the last quarter of 2009 to identify four channels through which economic shocks emanating from the United States were amplified when transmitted into Mexico's offshoring labor market of Northern Mexico. First, employment and imports within industries are complements, which is consistent with imports being used as inputs for the assembly of exportable goods within industries. That is, when imports fell during the crisis, employment in Mexico was reduced rather than protected by the fall of imports. Second, contrary to other studies, employment is more responsive than wages to trade shocks. Third, fluctuations in Mexico-U.S. trade were associated with changes in the composition of employment, with the skill level of workers rising during downturns and falling during upswings. This implies that the correlation between average wages and trade shocks is partly driven by labor-force compositional effects, which may obscure individual-worker wage flexibility. Fourth, trade shocks affecting related industries (industries linked by employment flows affect employment at least as much as own-industry trade shocks, thus amplifying employment volatility through the propagation of shocks across industries within Northern Mexico. Furthermore, the data suggest that the observed fluctuations in U.S.-Mexico trade at the onset of the Great Recession in the U.S. were not associated with pre-existing employment trends in Northern Mexico
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  • 22
    Language: English
    Pages: Online-Ressource (30 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Alik Lagrange, Arthur Evaluating Workfare When the Work is Unpleasant
    Abstract: Prevailing practices in evaluating workfare programs have ignored the disutility of the type of work done, with theoretically ambiguous implications for the impacts on poverty. In the case of India's National Rural Employment Guarantee Scheme, past assessments have relied solely on household consumption per person as the measure of economic welfare. The paper generalizes this measure to allow for the disutility of casual manual work. The new measure is calibrated to the distribution of the preference parameters implied by maximization of an idiosyncratic welfare function assuming that there is no rationing of the available work. The adjustment implies a substantially more "poor-poor" incidence of participation in the scheme than suggested by past methods. However, the overall impacts on poverty are lower, although still positive. The main conclusions are robust to a wide range of alternative parameter values and to allowing for involuntary unemployment using a sample of (self-declared) un-rationed workers
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  • 23
    Language: English
    Pages: Online-Ressource (26 p)
    Edition: 2012 World Bank eLibrary
    Parallel Title: Hollweg, Claire H Monitoring Export Vulnerability to Changes in Growth Rates of Major Global Markets
    Abstract: Interest in assessing the impacts on developing countries of changes in major markets' economic performance has risen in tandem with global economic uncertainty over short- and medium-term growth prospects. This paper proposes a methodology to measure the vulnerability of a country's exports to fluctuations in the economic activity of foreign markets. Export vulnerability depends first on the overall level of export exposure, measured as the share of exports in gross domestic product, and second on the sensitivity of exports to fluctuations in foreign gross domestic product. The authors capture this sensitivity by estimating origin-destination specific elasticities of exports with respect to changes in foreign gross domestic product using a gravity model of trade. Furthermore, export vulnerability is computed separately for commodities and differentiated products. This methodology is applied to six developing countries, one from each World Bank region, selected to be otherwise similar yet differ in terms of the level of exposure to major global markets as well as the product composition of their export basket. Although the results suggest differences in elasticity estimates across regions as well as product categories, the principal source of international heterogeneity in export vulnerability results from differences in export exposure to global markets. This result calls for developing countries to diversify their export markets rather than shielding themselves from international markets, which would actually raise economic risk and vulnerability
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  • 24
    Language: English
    Pages: Online-Ressource (20 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Lederman, Daniel Large devaluations, foreign direct investment and exports
    Abstract: One side-effect of the Global Financial Crisis of 2008-09 was the resurgence of a debate over exchange rates. The conventional wisdom dictates that real-exchange rate adjustments are needed in order to bring about changes in trade balances across countries. However, the literature on the effect of exchange rate fluctuations and currency under-valuations on exports is surprisingly ambiguous. This note explores for the first time the potential role of foreign direct investment as an intermediate variable in the process of trade adjustment after large real-exchange rate changes. Real-exchange rate devaluations might result in increases in foreign direct investment inflows, as investors can take advantage of changes in the foreign-currency value of domestic assets. If so, the response of exports will depend to some extent on the nature of such foreign direct investment inflows, with inflows motivated by "horizontal" foreign direct investment associated with negligible changes in export growth after devaluation. The author utilizes quarterly data on real effective exchange rates, foreign direct investment inflows and exports to explore the effects of large devaluations (defined as the largest observed quarterly real effective exchange rate devaluation) on foreign direct investment and exports from 1990 to 2010. The admittedly speculative evidence suggests that there were heterogeneous experiences regarding the timing and magnitude of subsequent changes in foreign direct investment and exports, but on average foreign direct investment inflows tended to precede export surges within two year horizons
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  • 25
    Language: English
    Pages: Online-Ressource (47 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Lambert, Sylvie Is it what you Inherited or what you Learnt?
    Abstract: Institutional features of the African setting-large extended families and imperfect credit and land markets-matter to the equity and efficiency roles played by intergenerational linkages. Using original survey data on Senegal that include an individualized measure of consumption, this paper studies the role played by land inheritance, other bequests and parental background as influences on an adult's economic welfare and economic activities. Although intergenerational linkages are evident, the analysis finds a seemingly high degree of mobility across generations, associated with the shift from farm to non-farm sectors and the greater economic activity of women. Male-dominated bequests of land and housing bring little gain to mean consumption and play little role in explaining inequality, although they have effects on the sector of activity. Inheritance of non-land assets and the education and occupation of parents (especially the mother) and their choices about children's schooling are more important to adult welfare than property inheritance. Significant gender inequality in consumption is evident, although it is almost entirely explicable in terms of factors such as education and (non-land) inheritance. There are a number of other pronounced gender differences, with intergenerational linkages coming through the mother rather than the father
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  • 26
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (22 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Ravallion, Martin On multidimensional indices of poverty
    Abstract: There has been a growing interest in what have come to be termed "multidimensional indices of poverty." Advocates for these new indices correctly point out that command over market goods is not all that matters to peoples' well-being, and that other factors need to be considered when quantifying the extent of poverty and informing policy making for fighting poverty. However, the author argues that there are two poorly understood issues in assessing these indices. First, does one believe that any single index can ever be a sufficient statistic for poverty assessments? Second, when aggregation is called for, should it be done in the space of "attainments," using prices when appropriate, or that of "deprivations," using weights set by the analyst? The paper argues that the goal for future poverty monitoring efforts should be to develop a credible set of multiple indices, spanning the dimensions of poverty most relevant to a specific setting, rather than a single multidimensional index. When weights are needed, they shouldn't be set solely by an analyst measuring poverty. Rather, they should be, as much as possible, consistent with well-informed choices made by poor people
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  • 27
    Language: English
    Pages: Online-Ressource (13 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Ravallion, Martin On the Implications of Essential Heterogeneity for Estimating Causal Impacts Using Social Experiments
    Abstract: Randomized control trials are sometimes used to estimate the aggregate benefit from some policy or program. To address the potential bias from selective take-up, the randomization is used as an instrumental variable for treatment status. Does this (popular) method of impact evaluation help reduce the bias when take-up depends on unobserved gains from take up? Such "essential heterogeneity" is known to invalidate the instrumental variable estimator of mean causal impact, though one still obtains another parameter of interest, namely mean impact amongst those treated. However, if essential heterogeneity is the only problem then the naïve (ordinary least squares) estimator also delivers this parameter; there is no gain from using randomization as an instrumental variable. On allowing the heterogeneity to also alter counterfactual outcomes, the instrumental variable estimator may well be more biased for mean impact than the naïve estimator. Examples are given for various stylized programs, including a training program that attenuates the gains from higher latent ability, an insurance program that compensates for losses from unobserved risky behavior and a microcredit scheme that attenuates the gains from access to other sources of credit. Practitioners need to think carefully about the likely behavioral responses to social experiments in each context
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  • 28
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (40 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Ravallion, Martin Knowledgeable Bankers?
    Abstract: Development impact calls for knowledgeable development practitioners. How then do the operational staff of the largest development agency value and use its research? Is there an incentive to learn and does it translate into useful knowledge? A new survey reveals that the bulk of the World Bank's senior staff value the Bank's research for their work, and most come to know it well, although a sizable minority have difficulty accessing research to serve their needs. Another group sees little value to research for their work and does not bother to find out about it. Higher perceived value is reflected in greater knowledge about research, though there are frictions in this process. Staff working on poverty, human development and economic policy tend to value and use research more than staff in the more traditional sectors of Bank lending-agriculture and rural development; the latter sectors account for 45 percent of lending but only 15 percent of staff highly familiar with Bank research. Without stronger incentives for learning and more relevant and accessible research products, it appears likely that this lag in demand for research by the traditional sectors will persist
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  • 29
    Language: English
    Pages: Online-Ressource (52 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Ravallion, Martin The two poverty enlightenments
    Abstract: Word searches of Google's library of digitized books suggest that there have been two “Poverty Enlightenments” since 1700, one near the end of the 18th century and the second near the end of the 20th. The historical literature suggests that only the second came with a widespread belief that poverty could and should be eliminated. After the first Poverty Enlightenment, references to “poverty” (as a percentage of all words) were on a trend decline until 1960, after which there was a striking resurgence of interest, which came with rising attention to economics and more frequent references to both general and specific policies relevant to poverty. Developing countries also became more prominent in the literature. Both Enlightenments came with greater attention to human rights. The written record reflects the push-back against government intervention and the retreat from leftist economics and politics since the late 1970s. Although many debates from 200 years ago continue today, there is little sign that the modern revival of the classical 19th century views on the limitations of government has come with a revival of the complacency about poverty that was common early in that century
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  • 30
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (32 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Lederman, Daniel International Trade and Inclusive Growth
    Abstract: This note provides two analytical frameworks for understanding the role of trade in promoting inclusive growth in developing economies. A working definition of inclusive growth focuses on long-term, sustained growth associated with productivity growth and employment opportunities for broad portions of households and firms within countries. International integration can promote inclusive growth when workers and firms are able to adjust to enter into growing economic activities and adopt technologies availed through international trade. The frameworks described in this note build on simple household and firm choice models, which require only basic knowledge of development economics. The discussion highlights how these frameworks can help analysts focus on research and policy questions related to the impacts of international trade across the distribution of households and firms within countries. It also discusses publicly available data sets that can be used to explore some aspects of inclusive growth. In addition, the note highlights important caveats that need to be acknowledged by analysts and discusses avenues for future research, which needs to be part and parcel of the inclusive growth agenda
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  • 31
    Language: English
    Pages: Online-Ressource (31 p)
    Edition: 2011 World Bank eLibrary
    Parallel Title: Arezki, Rabah The Relative Volatility of Commodity Prices
    Abstract: This paper studies the volatility of commodity prices on the basis of a large dataset of monthly prices observed in international trade data from the United States over the period 2002 to 2011. The conventional wisdom in academia and policy circles is that primary commodity prices are more volatile than those of manufactured products, although most of the existing evidence does not actually attempt to measure the volatility of prices of individual goods or commodities. The literature tends to focus on trends in the evolution and volatility of ratios of price indexes composed of multiple commodities and products. This approach can be misleading. Indeed, the evidence presented in this paper suggests that on average prices of individual primary commodities are less volatile than those of individual manufactured goods. However, the challenges of managing terms of trade volatility in developing countries with concentrated export baskets remain
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  • 32
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (38 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Ravallion, Martin Poverty Lines Across the World
    Abstract: National poverty lines vary greatly across the world, from under
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  • 33
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (35 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Klinger, Bailey Export Discoveries, Diversification and Barriers To Entry
    Abstract: The literature on the relationship between economic diversification and development has grown rapidly in recent years, partly due to the surprising finding that diversification rises with gross domestic product per capita up to a certain point. Export diversification along the extensive margin is inextricable from the introduction of new export products. The authors test the hypothesis that the threat of imitation inhibits the introduction of new exports - export discoveries - under the assumption that the intensive and extensive margins of exports are correlated within broad country-industry groups. Econometric evidence from panel-data techniques that are appropriate for count data (the number of discoveries) suggests that discoveries within countries and industries rise with the growth of exports along the intensive margin (relative to the growth of non-export gross domestic product) but the magnitude of this partial correlation increases with domestic barriers to entry and with customs delays in exporting. However, the magnification effect of barriers to entry appears to be less significant as a determinant of total within-country export discoveries. This is consistent with inter-industry and within-country spillovers related to export discoveries, implying that barriers to entry enhance the effect of export growth on discoveries within country-industries but total discoveries might be unaffected by barriers to entry
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  • 34
    Language: English
    Pages: Online-Ressource (29 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Ravallion, Martin Price Levels and Economic Growth
    Abstract: To the surprise of many observers, the 2005 International Comparison Program (ICP) found substantially higher purchasing power parity (PPP) rates, relative to market exchange rates, in most developing countries. For example, China’s price level index - the ratio of its PPP to its exchange rate - doubled between the 1993 and 2005 rounds of the ICP. The paper tries to explain the observed changes in PPPs. Consistently with the Balassa-Samuelson model, evidence is found of a "dynamic Penn effect," whereby more rapidly growing economies experience steeper increases in their price level index. This effect has been even stronger for initially poorer countries. Thus the widely-observed static (cross-sectional) Penn effect has been attenuated over time. On also taking account of exchange rate changes and prior participation in the ICP’s price surveys, 99 percent of the variance in the observed changes in PPPs is explicable. Using a nested test, the World Bank’s longstanding method of extrapolating PPPs between ICP rounds using inflation rates alone is out performed by the model proposed in this paper
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  • 35
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (54 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Wagstaff, Adam The World Bank's Publication Record
    Abstract: The World Bank has produced a huge volume of books and papers on development - 20,000 publications spanning decades, but growing appreciably since 1990. This paper finds evidence that many of these publications have influenced development thinking, as indicated by the citations found using Google Scholar and in bibliographic data bases. However, the authors also find that a non-negligible share of the Bank's publications have received no citations, suggesting that they have had little scholarly influence, though they may well have had influence on non-academic audiences. Individually-authored journal articles have been the main channel for scholarly influence. The volume of the Bank's research output on development is greater than that of any of the comparator institutions identified, including other international agencies and the top universities in economics. The bibliometric indicators of the quality and influence of the Bank's portfolio of scholarly publications are on a par with, or better than, most of the top universities
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  • 36
    Language: English
    Pages: Online-Ressource (34 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Lederman, Daniel Microeconomic consequences and macroeconomic causes of foreign direct investment in southern African economies
    Abstract: The causes and consequences of foreign direct investment (FDI) in developing countries remains a subject of debate among researchers and policymakers alike. The authors use international data and a new micro-data set of firms in thirteen Southern African Developing Countries (SADCs) to investigate the benefits and determinants of FDI in this region. FDI appears to have facilitated local development in the SADC region. Foreign firms tend to perform better than domestic firms, tend to be larger, are located in richer and better-governed countries and in countries with more competitive financial intermediaries, and they are more likely to export than domestic firms. They also exhibit positive spillover effects to domestic firms. Relying on a standard model to predict the country-level FDI inflows per capita, the authors find that SADC is attracting their expected level of FDI inflows, at least relative to its income level, human capital, demographic structure, institutions, and economic track record. There are some differences between SADC and the rest of the world in FDI behavior: in SADC, the income level is less important and openness more so. The authors use two comparison groups to compare with SADC to shed light on why other regions have attracted more FDI per capita than SADC. The factors that explain SADC’s low FDI inflows are economic fundamentals (e.g., previous growth rates, average income, phone density, and the adult share of population)
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  • 37
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (39 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Ravallion, Martin Mashup indices of development
    Abstract: Countries are increasingly being ranked by some new "mashup index of development," defined as a composite index for which existing theory and practice provides little or no guidance to its design. Thus the index has an unusually large number of moving parts, which the producer is essentially free to set. The parsimony of these indices is often appealing - collapsing multiple dimensions into just one, yielding unambiguous country rankings, and possibly reducing concerns about measurement errors in the component series. But the meaning, interpretation and robustness of these indices are often unclear. If they are to be properly understood and used, more attention needs to be given to their conceptual foundations, the tradeoffs they embody, the contextual factors relevant to country performance, and the sensitivity of the implied rankings to changing the data and weights. In short, clearer warning signs are needed for users. But even then, nagging doubts remain about the value-added of mashup indices, and their policy relevance, relative to the "dashboard" alternative of monitoring the components separately. Future progress in devising useful new composite indices of development will require that theory catches up with measurement practice
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  • 38
    Language: English
    Pages: Online-Ressource (31 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Lederman, Daniel Entrepreneurship and the Extensive Margin in Export Growth
    Abstract: The literature on the correlation between exports and economic development runs deep into the history of economic thought and permeates policy debates. This paper studies the microeconomic structure of export growth in Costa Rica, with special emphasis on the extensive margin of trade, encompassing new exporting firms, new products, and new export markets, as well as the unit values of new versus incumbent products. The data suggest that few new firms survive the test of exporting - more than 40 percent of firms exit export activities after one year - and this firm turnover is associated with a steady deterioration of export unit values (prices). Furthermore, most new export products are associated with product switching by incumbent exporting firms. The typical new product introduced by incumbent firms tended to be priced at about 90 percent of the unit values of incumbent products. In contrast, the usual suspected obstacles to export growth, such as the inability of small firms to enter exporting activities or to grow their exports, appear to be important sources of export growth. In fact, the smallest exporting firms experienced the fastest growth in their export values. Some of these results are compared with those from other countries that have been examined in related literature
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  • 39
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (22 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Wagstaff, Adam On Measuring Scientific Influence
    Abstract: Bibliometric measures based on citations are widely used in assessing the scientific publication records of authors, institutions and journals. Yet currently favored measures lack a clear conceptual foundation and are known to have counter-intuitive properties. The authors propose a new approach that is grounded on a theoretical "influence function," representing explicit prior beliefs about how citations reflect influence. They provide conditions for robust qualitative comparisons of influence - conditions that can be implemented using readily-available data. An example is provided using the economics publication records of selected universities and the World Bank
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  • 40
    Online Resource
    Online Resource
    Washington, D.C : The World Bank
    Language: English
    Pages: Online-Ressource (32 p)
    Edition: 2010 World Bank eLibrary
    Parallel Title: Ravallion, Martin Troubling tradeoffs in the Human Development Index
    Abstract: The 20th Human Development Report has introduced a new version of its famous Human Development Index (HDI). The HDI aggregates country-level attainments in life expectancy, schooling and income per capita. Each year's rankings by the HDI are keenly watched in both rich and poor countries. The main change in the 2010 HDI is that it relaxes its past assumption of perfect substitutability between its three components. However, most users will probably not realize that the new HDI has also greatly reduced its implicit weight on longevity in poor countries, relative to rich ones. A poor country experiencing falling life expectancy due to (say) a collapse in its health-care system could still see its HDI improve with even a small rate of economic growth. By contrast, the new HDI's valuations of the gains from extra schooling seem unreasonably high - many times greater than the economic returns to schooling. These troubling tradeoffs could have been largely avoided using a different aggregation function for the HDI, while still allowing imperfect substitution. While some difficult value judgments are faced in constructing and assessing the HDI, making its assumed tradeoffs more explicit would be a welcome step
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