Dynamics of r&d and investment in the scientific sector.

This paper empirically explores the dynamic interactions among research and development, capital investment, and the stock market performance of 191 firms in science-based industries during the period 1973-81. Using a framework based on dynamic factor analysis, we test asymmetric specifications of the dynamics between R & D and investment. The data indicate that R & D Granger-causes investment but that investment does not Granger-cause R & D. We discuss interpretations of this causal ordering, characterize the stylized facts of the movements over time of R & D and investment, and measure the stock market valuation of these movements.