Zvi Griliches, a world-renowned scholar and a pioneer in the field of productivity growth, has compiled in a single volume his work on research and development (R & D) and productivity. Griliches addresses the relationship between R & D and productivity, one of the most complex yet vital issues in today's business world. Using econometric techniques, he establishes this connection and measures its magnitude for firm-, industry-, and economy-level data. Several of these papers incorporate French and Japanese productivity data to provide a comparative perspective, and one new paper outlines future directions for productivity research. A comprehensive introduction puts the papers in the context of Griliches's distinguished body of work.