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Employer Credit Checks: Poverty Traps Versus Matching Efficiency

Review of Economic Studies 2025 92(3), 1661-1698
Abstract We develop a framework to understand pre-employment credit screening as a signal from credit markets that alleviates adverse selection in labour markets. In our theory, people differ in both their propensity to default on debt and the profits they create for firms that employ them; in our calibrated economy, highly productive workers have a low default probability. This leads firms to create more jobs for those with good credit, which creates a poverty trap: an unemployed worker with poor credit has a low job finding rate, but cannot improve her credit without a job. This manifests as an endogenous loss in present-discounted wages that is typically taken as exogenous in quantitative models of consumer default. Banning employer credit checks eliminates the poverty trap, but pools job seekers and reduces matching efficiency: average unemployment duration rises by 2 days for high productivity workers and falls by 13 days for low-productivity workers.

Cointegration and Tests of Purchasing Power Parity

The Review of Economics and Statistics 1988 70(3), 508
Nonstationarity in the levels of spot exchange rates and domestic and foreign price indices makes the use of conventional tests of the absolute version of purchasing power parity (PPP) inappropriate. If PPP is true, inter-country commodity arbitrage ensures that deviations from a linear combination of spot exchange rates and domestic and foreign price levels should be stationary. Under these conditions, exchange rates and price levels should form a cointegrated system. We find the null hypothesis of no cointegration cannot be rejected for all five countries, thus violating the long-run absolute version of PPP.

Reorganization or Liquidation: Bankruptcy Choice and Firm Dynamics

Review of Economic Studies 2021 88(5), 2239-2274
Abstract In this article, we ask how bankruptcy law affects the financial decisions of corporations and its implications for firm dynamics. According to current U.S. law, firms have two bankruptcy options: Chapter 7 liquidation and Chapter 11 reorganization. Using Compustat data, we first document capital structure and investment decisions of non-bankrupt, Chapter 11, and Chapter 7 firms. Using those data moments, we then estimate parameters of a general equilibrium firm dynamics model with endogenous entry and exit to include both bankruptcy options. Finally, we evaluate a bankruptcy policy change similar to one recommended by the American Bankruptcy Institute that amounts to a “fresh start” for bankrupt firms. We find that changes to the law can have sizable consequences for borrowing costs and capital structure which via selection affects productivity, as well as long run welfare.

Leverage and the Foreclosure Crisis

Journal of Political Economy 2015 123(1), 1-65
How much of the foreclosure crisis can be explained by the large number of high-leverage mortgages originated during the housing boom? In our model, heterogeneous households select from mortgages with different down payments and choose whether to default given income and housing shocks. The use of low–down payment loans is initially limited by payment-to-income requirements but becomes unrestricted during the boom. The model approximates key housing and mortgage market facts before and after the crisis. A counterfactual experiment suggests that the increased number of high-leverage loans originated prior to the crisis can explain over 60 percent of the rise in foreclosure rates.

Endogenous Market Participation and the General Equilibrium Value of Money

Journal of Political Economy 1992 100(3), 615-646
We study the monetary theory implications of fixed costs associated with trade in private assets. We show that with heterogeneous endowment profiles it is possible for an endogenous subset of agents to hold currency even when it is dominated in return by a competing asset. With respect to positive issues in monetary theory, the model implies that changes in the steady-state growth rate of the money supply have a negative effect on real interest rates because of endogenous market participation measures. On the normative side, we show that there may be an equity-efficiency trade-off from monetary deflation.

Endogenous Market Participation and the General Equilibrium Value of Money

Journal of Political Economy 1992 100(3), 615-646
We study the monetary theory implications of fixed costs associated with trade in private assets. We show that with heterogeneous endowment profiles it is possible for an endogenous subset of agents to hold currency even when it is dominated in return by a competing asset. With respect to positive issues in monetary theory, the model implies that changes in the steady-state growth rate of the money supply have a negative effect on real interest rates because of endogenous market participation measures. On the normative side, we show that there may be an equity-efficiency trade-off from monetary deflation.

Capital Buffers in a Quantitative Model of Banking Industry Dynamics

Econometrica 2021 89(6), 2975-3023
We develop a model of banking industry dynamics to study the quantitative impact of regulatory policies on bank risk‐taking and market structure. Since our model is matched to U.S. data, we propose a market structure where big banks with market power interact with small, competitive fringe banks as well as non‐bank lenders. Banks face idiosyncratic funding shocks in addition to aggregate shocks which affect the fraction of performing loans in their portfolio. A nontrivial bank size distribution arises out of endogenous entry and exit, as well as banks' buffer stock of capital. We show that the model predictions are consistent with untargeted business cycle properties, the bank lending channel, and empirical studies of the role of concentration on financial stability. We find that regulatory policies can have an important impact on banking market structure, which, along with selection effects, can generate changes in allocative efficiency and stability.