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内容説明 The Dynamics of Industrial Competition describes the internal dynamics of industries using new and unique longitudinal data that make it possible to track firms over time. It provides a comprehensive picture of a number of different aspects of firm turnover in North America that arise from the competitive process - the entry and the exit of firms， the growth and decline of incumbent firms， and the merger process. Instantaneous and cumulative measures of market dynamics are provided by examining change in both the short and the long run. Using various measures of firm turnover to proxy the amount of competition， the study examines and contextualizes the relationship between industry performance and the intensity of the competitive process.