The traditional Medicare fee-for-service program may be able to purchase clinical laboratory test services at a lower cost through competitive bidding. Demonstrations of competitive bidding for clinical laboratory tests have been twice mandated or authorized by Congress but never implemented....

It is widely believed that the English auction is solved after the dominated strategies are eliminated. This opinion is formally confirmed only for one "ascending clock" auction and can not be generalized for most other English auctions. In this paper I show that the formal argument which is...