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Bahar, Dany

This paper examines Japan’s economic performance in recent years, uncovering a narrative that challenges conventional views. Despite slow productivity growth, Japan maintains the highest economic complexity globally due to its sophisticated export portfolio. The study reveals that while Japan has been experiencing a decline in goods export market shares it has had a rise in services exports, particularly in R&D licensing. Furthermore, Japan has significantly increased its net foreign assets and direct investments abroad, resulting in abnormal high returns. These results put together suggest that Japanese firms —perhaps in reaction to a stagnant domestic labor force—are leveraging their extensive knowledge capital by investing and redeploying resources internationally, which are generating these higher returns. The increasing wealth generated abroad results, we show, in an expansion of non-tradable activities which are less productive, driving down aggregate productivity growth. The paper also highlights concerns over declining innovation quality, posing risks to Japan’s future economic performance and its ability to redeploy its accumulated knowledge to enjoy from unusually high returns from their foreign investments. The findings emphasize the need for policy reforms to enhance innovation quality to sustain Japan’s productivity of non-tradable activities and with an immigration policy that may change the downward trend in labor supply.

The literature on knowledge diffusion shows that it decays strongly with distance. In this paper we document that the probability that a product is added to a country’s export basket is, on average, 65% larger if a neighboring country is a successful exporter of that same product. For existing products, having a neighbor with comparative advantage in them is associated with a growth of exports that is higher by 1.5 percent per annum. While these results could be driven by a common third factor that escapes our controls, they are what would be expected from the localized character of knowledge diffusion.

In this paper we document that the probability that a product is added to a country’s export basket is, on average, 65% larger if a neighboring country is a successful exporter of that same product. We interpret our result as evidence of international intra-industry knowledge diffusion. Our results are consistent with the overall consensus in the literature on technology spillovers: diffusion is stronger at shorter distances; is weaker for more knowledge-intensive products; and has become faster over time.

Japan remains one of the world’s most technologically sophisticated economies, yet its labor productivity has been stagnant for more than two decades. This paper investigates the apparent contradiction between Japan’s high R&D intensity and its weak productivity performance by examining the allocation, composition, and effectiveness of innovation across industries. Using industry-level data from the OECD, patent-level data linked across technology and industry classifications, and a set of nine technological taxonomies, we document that Japan disproportionately concentrates R&D in mid-technology manufacturing sectors—such as motor vehicles, electrical equipment, and chemicals—that generate relatively low productivity spillovers. High-technology sectors, including ICT, pharmaceuticals, scientific R&D, and advanced digital services, receive a significantly smaller share of investment and exhibit much higher productivity contributions in other countries. We further show that Japan’s indirect, tax-based system of R&D support reinforces this equilibrium by favoring large incumbents and under-supporting SMEs. We conclude by assessing the potential of Japan’s new 17-sector strategy to reorient the innovation system toward frontier technologies.