A competitive firm produces output y. Some of its output is defective and cannot be sold. That is, only a fraction θ E (0, 1) can be sold in the market at unit price p. Let the cost function be c(y), with (y) 0 and c"() >0. Suppose that with experience, the share of good output θ increases. Does the firm compensate for the increased yield by reducing production, or will it instead increase production?