This paper describes the U.S. offshore oil and gas lease sales conduct
ed by the Department of the Interior since 1954. Several decisions are
discussed, including bidding for leases, the government's decision wh
ether to accept the highest bid, the incidence and timing of explorato
ry drilling, and the formation of bidding consortia. Equilibrium model
s of these decisions that emphasize informational and strategic issues
and that account for institutional features of the leasing program ar
e analyzed, and their predictions compared to outcomes in the data.