Identifying Asset Poverty Thresholds New methods with an application to Pakistan and Ethiopia
Understanding how households escape poverty depends on understanding how they accumulate assets over time. Therefore, identifying the degree of linearity in household asset dynamics, and specifically any potential asset poverty thresholds, is of fundamental interest to the design of poverty reduction policies. If household asset holdings converged unconditionally to a single long run equilibrium, then all poor could be expected to escape poverty over time. In contrast, if there are critical asset thresholds that trap households below the poverty line, then households would need specific assistance to escape poverty. Similarly, the presence of asset poverty thresholds would mean that short term asset shocks could lead to long term destitution, thus highlighting the need for social safety nets. In addition to the direct policy relevance, identifying household asset dynamics and potential asset thresholds presents an interesting methodological challenge to researchers. Potential asset poverty thresholds can only be identified in a framework that allows multiple dynamic equilibria. Any unstable equilibrium points would indicate a potential poverty threshold, above which households are expected to accumulate further and below which households are on a trajectory that makes them poorer over time. The key empirical issue addressed in the paper is whether such threshold points exist in Pakistan and Ethiopia and, if so, where they are located. Methodologically, the paper explores what econometric technique is best suited for this type of analysis. The paper contributes to the small current literature on modeling nonlinear household welfare dynamics in three ways. First, it compares previously used techniques for identifying asset poverty traps by applying them to the same dataset, and examines whether, and how, the choice of estimation technique affects the result. Second, it explores whether other estimation techniques may be more suitable to locate poverty thresholds. Third, it adds the first study for a South Asian country and makes a comparison with Ethiopia. Household assets are combined into a single asset index using two techniques: factor analysis and regression. These indices are used to estimate asset dynamics and locate dynamic asset equilibria, first by nonparametric methods including LOWESS, kernel weighted local regression and spline smoothers, and then by global polynomial parametric techniques. To combine the advantages of nonparametric and parametric techniques - a flexible functional form and the ability to control for covariates, respectively - the paper adapts a mixed model representation of a penalized spline to estimate asset dynamics through a semiparametric partially linear model. This paper identifies a single dynamic asset equilibrium with a slightly concave dynamic asset accumulation path in each country. There is no evidence for multiple dynamic equilibria. This result is robust across econometric methods and across different ways of constructing the asset index. The concave accumulation path means that poorer households recover more slowly from asset shocks. Concavity also implies that greater initial equality of assets would lead to higher growth. Moreover, the dynamic asset equilibria are very low. In Pakistan it is below the average asset holdings of the poor households in the sample. In Ethiopia, the equilibrium is barely above the very low mean. This, together with the slow speed of asset accumulation for the poorest households, suggests that convergence towards the long run equilibrium may be slow and insufficient for rural households in Pakistan and Ethiopia to escape poverty.
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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Kaushik Basu, 1999.
"Child Labor: Cause, Consequence, and Cure, with Remarks on International Labor Standards,"
Journal of Economic Literature,
American Economic Association, vol. 37(3), pages 1083-1119, September.
- Basu, Kaushik, 1998. "Child labor : cause, consequence, and cure, with remarks on International Labor Standards," Policy Research Working Paper Series 2027, The World Bank.
- Aghion, Philippe & Caroli, Eve & Garcia-Penalosa, Cecilia, 1999.
"Inequality and economic growth: the perspective of the new growth theories,"
CEPREMAP Working Papers (Couverture Orange)
- Cecilia Garcia-Penalosa & Eve Caroli & Philippe Aghion, 1999. "Inequality and Economic Growth: The Perspective of the New Growth Theories," Journal of Economic Literature, American Economic Association, vol. 37(4), pages 1615-1660, December.
- Aghion, Philippe & Caroli, Eve & GarcÃa-PeÃ±alosa, Cecilia, 1999. "Inequality and Economic Growth: The Perspective of the New Growth Theories," Scholarly Articles 12502063, Harvard University Department of Economics.
- Pagan,Adrian & Ullah,Aman, 1999.
Cambridge University Press, number 9780521355643, October.
- Oded Galor & Joseph Zeira, 1993.
"Income Distribution and Macroeconomics,"
Review of Economic Studies,
Oxford University Press, vol. 60(1), pages 35-52.
- Barrett, Christopher B., 2003.
"Rural Poverty Dynamics: Development Policy Implications,"
127243, Cornell University, Department of Applied Economics and Management.
- Christopher B. Barrett, 2005. "Rural poverty dynamics: development policy implications," Agricultural Economics, International Association of Agricultural Economists, vol. 32(s1), pages 45-60, 01.
- Barrett, Christopher B., 2003. "Rural Poverty Dynamics: Development Policy Implications," 2003 Annual Meeting, August 16-22, 2003, Durban, South Africa: Plenary Sessions 245921, International Association of Agricultural Economists.
- Banerjee, Abhijit V & Newman, Andrew F, 1993.
"Occupational Choice and the Process of Development,"
Journal of Political Economy,
University of Chicago Press, vol. 101(2), pages 274-298, April.
- Abhijit V. Banerjee & Andrew F. Newman, 1990. "Occupational Choice and the Process of Development," Discussion Papers 911, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Emerson, Patrick M & Souza, Andre Portela, 2003.
"Is There a Child Labor Trap? Intergenerational Persistence of Child Labor in Brazil,"
Economic Development and Cultural Change,
University of Chicago Press, vol. 51(2), pages 375-398, January.
- Emerson, Patrick M & Souza, Andre Portela, 2003. "Is There a Child Labor Trap? Intergenerational Persistence of Child Labor in Brazil," Economic Development and Cultural Change, University of Chicago Press, vol. 51(2), pages 375-398, January.
- Patrick M. Emerson & Andre Portela Souza, 2002. "Is There a Child Labor Trap? Inter-Generational Persistence of Child Labor in Brazil," Vanderbilt University Department of Economics Working Papers 0214, Vanderbilt University Department of Economics.
- Lybbert, Travis J. & Barrett, Christopher B. & Desta, Solomon & Coppock, D. Layne, 2002.
"Stochastic Wealth Dynamics And Risk Management Among A Poor Population,"
14736, Cornell University, Department of Applied Economics and Management.
- Travis J. Lybbert & Christopher B. Barrett & Solomon Desta & D. Layne Coppock, 2004. "Stochastic wealth dynamics and risk management among a poor population," Economic Journal, Royal Economic Society, vol. 114(498), pages 750-777, October.
- Sahn, David E. & Stifel, David C., 2000. "Poverty Comparisons Over Time and Across Countries in Africa," World Development, Elsevier, vol. 28(12), pages 2123-2155, December.
- Jalan, Jyotsna & Ravallion, Martin, 2002.
"Household Income Dynamics in Rural China,"
Working Paper Series
UNU-WIDER Research Paper , World Institute for Development Economic Research (UNU-WIDER).
- Michael Carter & Christopher Barrett, 2006. "The economics of poverty traps and persistent poverty: An asset-based approach," Journal of Development Studies, Taylor & Francis Journals, vol. 42(2), pages 178-199.
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