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3 - The Measurement and Estimation of Productivity Growth

Published online by Cambridge University Press:  05 June 2014

Edward N. Wolff
Affiliation:
New York University
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Summary

Introduction

In the last chapter I presented an overview of modern growth theory and touched on some measurement and econometric issues. It is now helpful to provide technical details on both the measurement and the estimation of productivity growth, particularly total factor productivity (TFP) growth. In this chapter, I present the theoretical foundation for much of the empirical literature dealing with issues of productivity measurement.

As Erwin Diewert emphasized in a number of papers, TFP is a production function–based concept (see, for example, Diewert, 1976). Although all researchers would agree that productivity growth has occurred if a firm is able to produce more output from the same vector of inputs, the quantitative estimate of the magnitude of TFP growth depends on how each researcher chooses to measure it. There are several different ways to measure TFP – empirically based index numbers, econometric methods, stochastic frontier methods, and data envelopment analysis (DEA). It is important to address this issue, as well as many other important theoretical issues associated with defining and measuring productivity change. For instance, an uncritical reader might get the mistaken impression that there is such a thing as an industry-level or country-level production function and that it has the Cobb-Douglas functional form, because almost all empirical work in this literature uses this functional form.

Type
Chapter
Information
Productivity Convergence
Theory and Evidence
, pp. 70 - 123
Publisher: Cambridge University Press
Print publication year: 2013

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