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Too poor to grow, Volume 1
 
Author:Lopez, Humberto; Serven, Luis; Collection Title:Policy Research working paper ; no. WPS 5012
Country:World; Date Stored:2009/08/05
Document Date:2009/08/01Document Type:Policy Research Working Paper
SubTopics:Achieving Shared Growth; Economic Theory & Research; InequalityLanguage:English
Major Sector:Public Administration, Law, and JusticeRel. Proj ID:1W-Reforms And Growth -- -- P080834;
Region:The World RegionReport Number:WPS5012
Sub Sectors:Central government administrationVolume No:1

Summary: Recent theoretical literature has suggested a variety of mechanisms through which poverty may deter growth and become self-perpetuating. A few papers have searched for empirical regularities consistent with those mechanisms – such as aggregate non-convexities and convergence clubs. However, a seemingly basic implication of the theoretical models, namely that countries suffering from higher levels of poverty should grow less rapidly, has remained untested. This paper attempts to fill that gap and provide a direct empirical assessment of the impact of poverty on growth. The paper’s strategy involves including poverty indicators among the explanatory variables in an otherwise standard empirical growth equation. Using a large panel dataset, the authors find that poverty has a negative impact on growth that is significant both statistically and economically. This result is robust to a variety of specification changes, including (i) different poverty lines; (ii) different poverty measures; (iii) different sets of control variables; (iv) different estimation methods; (v) adding inequality as a control variable; and (vi) allowing for nonlinear effects of inequality on growth. The paper also finds evidence that the adverse effect of poverty on growth works through investment: high poverty deters investment, which in turn lowers growth. Further, the data suggest that this mechanism only operates at low levels of financial development, consistent with the predictions of theoretical models that underscore financial market imperfections as a key ingredient of poverty traps.

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