Using data from the turn-of-the-century whiskey industry, we conduct tests of the NEIO methodology similar to those conducted by Genesove and Mullin [1998]. Like Genesove and Mullin, we find that the NEIO methodology appears to perform reasonably well for low levels of market power. Conduct is...

Using data collected between August, 1999, and January, 2000, covering 399 books, we examine pricing by thirty-two online United States-based bookstores. At the aggregate level, we find that both advertising and competitive structure had the predicted effects. More competition led to lower...