This paper deals with processes that require several complementary inputs subject to improvements in quality. If after a quality upgrade one of these inputs requires a period of learning before it can be used effectively, then in general it will pay to purchase the inputs at different dates --...

This paper deals with processes that require several complementary inputs subject to improvements in quality. If after a quality upgrade one of these inputs requires a period of learning before it can be used effectively, then in general it will pay to purchase the inputs at different dates --...

To study the role of home production in life¿cycle behavior, this paper creates a theoretical model in which both spouses in a couple allocate their time between market and home work. It then derives a pair of regression equations for estimating the parameters of the model, and it carries out...