"We investigate the information content of inter- transaction time and find that it varies both across stocks and over time. On average, inter-transaction time is found to be informative whenever stocks are sufficiently traded. The magnitude of the information content is found to be larger for...

"This paper empirically examines the effects of market size on producers' sizes in retail trade industries with many producers. A robust prediction of oligopoly theory is that larger markets are more competitive and have lower price-cost markups. Because producers in more competitive markets...

"We calibrate a model of labor demand to infer the employment responseto a change in the minimum wage in the food away from home industry. Assuming a perfectly competi- tive labor market, the model predicts a 2.5 to 3.5 percent fall in employment in response to a 10 percent minimum wage change....