Abstract
Technological changes in the U.S. pulp and paper industry between 1915 and 1940 are chronicled, and three patterns—evolutionary bias, output-increasing innovation in response to technological disequilibria, and differences in the timing of innovations between the 1920s and 1930s—are identified and explained by means of a theoretical framework for induced innovation. The framework conceptualizes technological change as a means for growth-seeking firms to overcome barriers to accumulation and provides a general explanation of induced innovation that is situated in historical time.

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