COWLES FOUNDATION FOR RESEARCH IN ECONOMICS
AT YALE UNIVERSITY

Box 208281
New Haven, CT 06520-8281

COWLES FOUNDATION DISCUSSION PAPER NO. 500R

"Bidding in Auctions with Multiplicative Lognormal Errors: An Example"

Richard Engelbrecht-Wiggans

October 1978
Revised April 1979

Auction models with lognormally-distributed multiplicative errors are used extensively in models of mineral lease sales. Equilibrium strategies are typically difficult to calculate; multiplicative strategies are often used as approximations. An example based on a federal offshore oil lease sale shows that multiplicative strategies may be quite far from being in equilibrium. However, under a special form of repetition, such strategies converge very rapidly to an equilibrium. The effects of any fixed costs, the reservation price, the number of bidders and the variance of the error are examined briefly for this example