We explore the business cycle implications of expectation shocks and of two well-known psychological biases, optimism and overconfidence. The expectations of optimistic agents are biased toward good outcomes, while overconfident agents overestimate the precision of the signals that they receive....

This paper constructs a simple model in which asset price fluctuations are caused by sunspots. Most existing sunspot models use local linear approximations: instead, I construct global sunspot equilibria. My agents are expected utility maximizers with logarithmic utility functions, there are no...

Firms in emerging markets are exposed to severe financial frictions and credit constraints, that are exacerbated by the sudden stop of capital inflows. Can monetary policy offset this external credit squeeze? We show that although this may be the case during moderate contractions (or in partial...

The latest boom in commodity prices fueled concerns about fiscal policies in commodity-exporting countries, with many claiming that it triggered loose fiscal policy and left no funds for a rainy day. This paper examines the links between fiscal policy and terms-of-trade fluctuations using a...

Governments in emerging markets often behave like a "tormented insurer," trying to use non-state-contingent debt instruments to avoid cuts in payments to private agents despite large fluctuations in public revenues. In the data, average public debt-GDP ratios decline as the variability of...

We study the effects of changes in uncertainty about future fiscal policy on aggregate economic activity. Fiscal deficits and public debt have risen sharply in the wake of the financial crisis. While these developments make fiscal consolidation inevitable, there is considerable uncertainty about...

Forecasting currencies with commodity prices -- Commodity prices, commodity currencies, and global economic developments / Jan J. J. Groen and Paolo A. Pesenti -- Comments: Kalok Chan, Roberto S. Mariano -- The relationship between commodity prices and currency exchange rates: evidence from the...

After decades of trial, error, and occasional regress the pieces of a successful Latin American economic model can be seen scattered among the leading economies of the region. The most traditional macroeconomic maladies of the emerging world - such as chronic fiscal imbalances and monetary...