Defined and illustrated in this book is the measurement of productivity and the sources and effects of technological change for industries and enterprises. A general framework for analysis unites general assumptions about market structure and producer motivation with new econometric methods to quantify, e.g. economics of scale and scope, learning effects and sources of biased technological change. Adaptation of accounting data to appropriate financial and economic concepts is stressed for both econometric and non-econometric measurement methods. High technology industries such as computers, semiconductors and telecommunications equipment are studied as well as regulated service enterprises. Computation and estimation routines for the SORITEC econometrics software are available on diskette from the authors.