We empirically study the dynamics of R&D productivity by firm size over an industry's life cycle. To do this, we examine the relationship between R&D expenditures, firm size, and new product introductions at the firm level in the personal computer industry. In general, we find the following. (1)...

This paper presents some rather complicated empirical work employing econometric modelling to demonstrate the validity of a quite simple proposition: the use of a product's price as an indicator of quality is only justified when the market is free of trade barriers and other imperfections. It...