Incomplete Markets, Transitory Shocks And Welfare
AbstractEquilibrium allocations in models with incomplete markets are generally not Pareto-efficient, but some argue that the welfare losses from missing assets are small when time-horizons are long, agents are patient, and shocks are transitory. We show that even in the simplest infinite horizon model without aggregate uncertainty welfare losses can be substantial and do not disappear when agents become more patient. Our argument has two parts. First, we argue that in dynamic models the persistence of income shocks should increase when the length of a period in the model decreases. This is necessary to maintain realistic properties for the serial correlation in annual income. We show computationally that in this case, the welfare losses from incomplete markets remain constant even as we reduce the model period. Second, we reexamine the analysis in Levine and Zame (1999). They claim that the incomplete market welfare converges to the complete market welfare as the discount factor converges to one. We show that this critically relies on their implicit assumptions regarding debt constraints, and that there is no convergence with more realistic debt constraint assumptions.
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Bibliographic InfoPaper provided by Society for Computational Economics in its series Computing in Economics and Finance 2000 with number 130.
Date of creation: 05 Jul 2000
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- Felix Kubler & Karl Schmedders, 2001. "Incomplete Markets, Transitory Shocks, and Welfare," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 4(4), pages 747-766, October.
- Felix Kubler & Karl Schmedders, 2000. "Incomplete Markets, Transitory Shocks, and Welfare," Discussion Papers 1285, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Felix Kubler & Karl Schmedders, 2000. "Incomplete Markets, Transitory Shocks and Welfare," Levine's Working Paper Archive 2133, David K. Levine.
- D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
- D58 - Microeconomics - - General Equilibrium and Disequilibrium - - - Computable and Other Applied General Equilibrium Models
- D60 - Microeconomics - - Welfare Economics - - - General
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