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Financial Deepening, Inequality, and Growth: A Model-Based Quantitative Evaluation1

Review of Economic Studies 2006 73(1), 251-293
We propose a coherent unified approach to the study of the linkages among economic growth, financial structure, and inequality, bringing together disparate theoretical and empirical literature. That is, we show how to conduct model-based quantitative research on transitional paths. With analytical and numerical methods, we calibrate and make tractable a prototype canonical model and take it to an application, namely, Thailand 1976–1996, an emerging market economy in a phase of economic expansion with uneven financial deepening and increasing inequality. We look at the expected path generated by the model and conduct robustness experiments. Because the actual path of the Thai economy is imagined here to be just one realization of many possible histories of the model economy, we construct a covariance-normalized squared error metric of closeness and find the best-fit simulation. We also construct a confidence region from a set of simulations and formally test the model. We broadly replicate the actual data and identify anomalies.

Private Information and Intertemporal Job Assignments1

Review of Economic Studies 2006 73(2), 531-548
This paper studies the assignment of people to projects over time in a model with private information. The combination of risk neutrality with incomplete contracts that restrict the ability of an agent to report on interim states is a force for long-term assignments. More generally, however, rotating agents can be valuable because it conceals information from agents, which mitigates incentive constraints. With complete contracts that communicate interim states, rotation allows for even more concealment possibilities and better-targeted incentives. Furthermore, it allows for the reporting of interim shocks at no cost to the principal. Properties of the production technology are also shown to matter. Substitutability of intertemporal effort is a force for long-term assignments, while coordination with Nash equilibrium strategies is a force for job rotation.

Firms as Clubs in Walrasian Markets with Private Information

Journal of Political Economy 2006 114(4), 644-671
We incorporate multiagent, principal‐agent theory into general equilibrium analysis. The traded commodities are multiagent contracts that include a description of the individual’s job, effort level, and state‐contingent consumption. These contracts are club goods. The competitive equilibrium and the Pareto program are formulated. The contracts are identified with firms, so the market determines which firms exist and who is assigned to which firm in what capacity. An example is provided in which the internal organization of firms and the distribution of firm classes vary with the aggregate capital endowment and its distribution across agents. A simplex‐based algorithm for solving the Pareto program is developed.

Distinguishing Limited Liability from Moral Hazard in a Model of Entrepreneurship

Journal of Political Economy 2006 114(1), 100-144
We present and estimate a model in which the choice between entrepreneurship and wage work may be influenced by financial market imperfections. The model allows for limited liability, moral hazard, and a combination of both constraints. The paper uses structural techniques to estimate the model and identify the source of financial market imperfections using data from rural and semiurban households in Thailand. Structural, nonparametric, and reduced‐form estimates provide independent evidence that the dominant source of credit market imperfections is moral hazard. We reject the hypothesis that limited liability alone can explain the data.