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4 - The rise and fall of incumbents

Published online by Cambridge University Press:  30 March 2010

John R. Baldwin
Affiliation:
Statistics Canada
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Summary

One tree will last longer in full vigour and attain a greater size than another, but sooner or later age tells on them all. Though the taller ones have a better access to light and air than their rivals, they gradually lose vitality, and one after another they give place to others.

Alfred Marshall (1920: 316)

Introduction

The entry and exit of entire firms account for only part of the turnover that transfers market share from one firm to another. Entry occurs at the beginning of a firm's life, exit at the end. In the interim, infra-marginal change within the body of an industry occurs as incumbents grow and decline. In Chapters 2 and 3, the magnitude of entry and exit is described in detail. This chapter outlines the amount and pattern of turnover in incumbent firms – those that continue from one period to another – and compares it with the amount of turnover occasioned by entry and exit.

The amount of turnover can be expressed either in terms of absolute expansion and contraction in firm size or in terms of relative change such as shifts in market shares. In the first section, the pattern of change is examined using rates of growth and decline in firms defined at the level of the manufacturing sector as a whole; in the second section, the market share being shifted from those gaining to those losing relative position within a four-digit manufacturing industry is examined.

Appreciating the magnitude of the entry and exit process requires a comparison of instantaneous and cumulative rates of change.

Type
Chapter
Information
The Dynamics of Industrial Competition
A North American Perspective
, pp. 61 - 81
Publisher: Cambridge University Press
Print publication year: 1995

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