This paper presents a simple new method for estimating the size of ‘wealth effects?on aggregate consumption. The method exploits the well-documented sluggishness of consumption growth (often interpreted as ‘habits?in the asset pricing literature) to distinguish between short-run and long-run...

This paper introduces a method for solving numerical dynamic stochastic optimization problems that avoids rootfinding operations. The idea is applicable to many microeconomic and macroeconomic problems, including life cycle, buffer-stock, and stochastic growth problems. Software is provided.

We argue that the U.S. personal saving rate’s long stability (1960s–1980s), subsequent steady decline (1980s–2007), and recent substantial rise (2008–2011) can be interpreted using a parsimonious 'buffer stock' model of consumption in the presence of labor income uncertainty and credit...