Academic research, government inquiries, and press accounts show extensive mortgage fraud during the housing boom of the mid-2000s. We explore a particular type of mortgage fraud: the overstatement of income on mortgage applications. We define “income overstatement” in a zip code as the...

This paper develops a micro-founded general equilibrium model of the financial system composed of ultimate borrowers, ultimate lenders and financial intermediaries. The model is used to investigate the impact of uncertainty about the likelihood of governmental bailouts on leverage, interest...

In this paper, we provide an economy-wide perspective on equity and debt across banks and industrial firms when both are faced with incentive problems and equity is scarce. Increasing bank equity may mitigate the bank-level moral hazard but exacerbates the firm-level moral hazard due to the...

There is a demand for safe assets, either government bonds or private substitutes, for use as collateral. Government bonds are safe assets, given the government's power to tax, but their supply is driven by fiscal considerations, and does not necessarily meet the private demand for safe assets....

Insurance contracts contingent on macroeconomic shocks or on average bank capital could be a way of insuring against systemic crises. With insurance, banks are recapitalized when negative events would otherwise cause a write down of capital or even bank insolvency. In a simple model we...

This paper explores the origins and evolving role of money. It stresses the role of money in solving coordination problems. This role is present with or without exchange. A historical overview of money stresses the evolutionary aspects of monetary institutions. The analysis develops a general...

Deterioration in the link between M2 and GDP, along with large prediction errors, led the Federal Reserve to downgrade M2 as a reliable indicator in 1993. We argue that the financial condition of depository institutions was a major factor behind this unusual pattern of M2 growth. When...

This paper summarizes and explains the main events of the liquidity and credit crunch in 2007-08. Starting with the trends leading up to the crisis, I explain how these events unfolded and how four different amplification mechanisms magnified losses in the mortgage market into large dislocations...

This article complements the structural New-Keynesian macro framework with a no-arbitrage affine term structure model. Whereas our methodology is general, we focus on an extended macro-model with an unobservable time-varying inflation target and the natural rate of output which are filtered from...

This paper studies bank runs in a model with private money. We show that allowing claims on demand deposits to circulate as a medium of exchange can help prevent bank runs. In our model, there exists a unique banking equilibrium where no one demands early withdrawals of real goods and agents in...