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We analyze the dynamic interaction of Japan’s total factor productivity, gross domestic product (GDP) domestic and foreign private and public research and development (R&amp;D) in vector-error-correction models (VECMs) for Japan with data from 1963–2017. Extensive testing leads to favoring a model with five cointegrating equations for the six variables. Analysis of effects of permanent policy changes shows that (i) additional public R&amp;D encourages private R&amp;D and total factor productivity (TFP), and has higher internal rates of return than private R&amp;D changes and therefore could speed up Japan’s growth; (ii) public R&amp;D changes have a statistically significant positive permanent effect on foreign private R&amp;D stocks and a transitional effect on foreign public R&amp;D stocks; (iii) private R&amp;D changes have a statistically significant positive permanent effect on foreign public R&amp;D stocks and a transitional effect on foreign private R&amp;D stocks; (iv) after a temporary GDP change, public R&amp;D is counter-cyclical in the short and medium run and private R&amp;D is pro-cyclical. Empirical results are related to the parameters of a VES (variable elasticity of substitution) function for TFP production.

Japan’s Productivity and GDP Growth: The Role of Private, Public and Foreign R&D 1967–2017