In early 2004, the U.S. Government initiated the Medicare Discount Drug Card Program, under which a large amount of pharmacy-level price data pertaining to over 800 drugs has been released weekly on the Medicare Web site continuously between May 29, 2004 and October 2005. This extensive...

In early 2004, the U.S. Government initiated the Medicare Discount Drug Card Program, which created a market for drug cards that allowed their subscribers to obtain discounts on their prescription drug purchases. Pharmacy-level prices for several drugs were posted on the program website weekly...