Competition policy aims to prevent anticompetitive agreements and mergers, limiting the abusive exercise of market power. The formulation and application of this policy presents significant challenges, which include showing that proposed mergers are anticompetitive, proving that firms are...

This paper develops a North-South trade model in which the South produces food and the North produces both food and a high-tech good. Food production is undertaken by unskilled workers while the high-tech product is made only by horizontally dierentiated skilled workers. Due to the possibility...

We develop a model of innovation in which entrepreneurs develop a new (differentiated) product market that is subsequently exploited by a well-established firm that "stretches" its brand to enter a new market as "fast second". In this setting, there is a positive externality to the pioneering...

We present an empirical analysis of product differentiation using a new dynamic panel data set on film programming choice in a major U.S. metropolitan motion-pictures exhibition market. Using these data, we compute two measures of film programming choice, which allow us to investigate the...

We analyze policy options during an international health emergency to provide consumers in least developed countries access to patented life-extending pharmaceuticals. We show that a properly specified tariff against reexports achieves optimal price dispersion and is shown to depend on the...

We analyze policy options during an international health emergency to provide consumers in least developed countries access to patented life-extending pharmaceuticals. We show that a properly specified tariff against re?xports achieves optimal price dispersion and is shown to depend on the...