“Assignment messages” are messages that parameterize substitutable preferences using a particular linear program. An “assignment exchange” is a simplified Walrasian exchange in which participants are restricted to report only assignment messages. Any pure Nash or e-Nash equilibrium of...

This paper provides an analysis of the role of prices in determining food purchases and nutrition using very detailed transaction-level observations for a large, nationally-representative sample of US consumers over the period 2002-2007. Using product-specific nutritional information, we develop...

We review different empirical approaches that researchers take to estimate how consumption responds to income changes. We critically evaluate the empirical evidence on the sensitivity of consumption to predicted income changes, distinguishing between the traditional excess sensitivity tests, and...

This paper analyzes how the interaction between firms’ entry-and-exit decisions and variations in competition gives rise to self-fulfilling, expectation-driven fluctuations in aggregate economic activity and in measured total factor productivity (TFP). The analysis is based on a dynamic...

Patents award innovators a fixed period of market exclusivity, e.g., 20 years in the United States. Yet, since in many industries firms file patents at the time of discovery ("invention") rather than first sale ("commercialization"), effective patent terms vary: inventions that commercialize at...

We present new evidence on the ability of chains to improve control over prices set in their franchised outlets. We construct and analyze panel data of fast food outlets from 1999 and 2006 to quantify price differences between franchised and corporate-owned outlets, and to test whether the...

This paper considers three simple rules-based strategies to improve and maintain financial stability. The first reforms the rules of bankruptcy to handle large financial institutions with a minimum of disruption. The second would focus macro-prudential policy on setting permanent and appropriate...

This paper presents evidence that the recession of 2007-2009 and the weak recovery have both been caused by poor economic policies, including a shift toward more discretionary, more interventionist and less predictable actions. While these policies may have led to temporary growth spurts,...

We present a simple framework to illustrate the welfare consequences of a “top up” health insurance policy that allows patients to pay the incremental price for more expensive treatment options. We contrast it with common alternative policies that require essentially no incremental payments...

Charter schools have become a very popular instrument for reforming public schools, because they expand choices, facilitate local innovation, and provide incentives for the regular public schools while remaining under public control. Despite their conceptual appeal, evaluating their performance...