Basic Research and Productivity Increase in Manufacturing: Additional Evi¬dence

Abstract

In a recent paper in this Review, Edwin Mansfield illustrated empirically (using a sample of ten petroleum and six chemical firms) that firm rates of productivity change are related to the amount of companyfinanced basic research performed, certeris paribus. In this note additional evidence is presented which is supportive of Mansfield's findings. This analysis is based on a sample of fifty- one major manufacturing firms active in R&D: it is unique in that the impacts of company-financeda nd governmentfinancedb asic researche xpendituresa re consideredd eterminantso f productivityg rowth. The following model was estimated

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