This paper examines the sources of productivity growth for the U.S. telecommunications industry from 1935 to 1987. These years encompass both the pre- and post-AT&T divestiture periods. We formulate a structural model that accounts for both changes in the cost and the demand side of the...

In this paper, we examine the sources of the productivity growth in the U.S. computer industry from 1978 to 1999. We estimate a joint production model of output quantity and quality that distinguishes two types of technological changes: process and product innovations. Based on the estimation...