Price analysis was used to determine if the behavior of weekly lettuce prices at shipping points and wholesale terminal markets is generally consistent with a competitive marketing system. Results indicated that the winter lettuce market in 1966-68 performed in an orderly and competitive manner. Prices at different locations were established that were consistent with marketing costs--transportation, storage, and handling. Prices at all locations in the marketing system were closely correlated. Margins were related to the distance transported and the price of the commodity. Shipping-point prices of lettuce were inversely related to the supply of product available. Wholesale terminal market prices directly responded to shifts in shipping-point prices. The marketing system for fresh winter lettuce generally performed efficiently in establishing prices that cleared the supply of perishable produce each day and week of the marketing season.