Data on all generic drug entries in the period 1984-1994 are used to estimate which markets heterogeneous potential entrants will decide to enter. I find that organizational experience predicts entry. Firms tend to enter markets with supply and demand characteristics similar to the firm's...

Because of its unique institutional and regulatory features, the generic drug industry provides a useful laboratory for understanding how competition evolves within a market. We exploit these features to estimate a system of structural relationships in this industry, including the relationship...

The Hatch-Waxman Act encourages generic drug companies to challenge the patents on brand name drugs by awarding the first generic challenger 180 days of generic marketing exclusivity, a bounty often worth millions of dollars. Challenging a patent usually triggers patent infringement litigation...