摘要：This study presents new estimates of business R&D
capital stocks for 22 countries at the aggregate
and industry levels. At 9 percent of GDP, the EU
business R&D capital stock falls short of its US
and Japanese counterparts. Within the EU, R&D
capital stocks are much lower in the southern and
the new member states, reflecting large and persistent
disparities in R&D expenditure. There was hardly
any convergence over the past decade. The R&D
capital stock is concentrated on three technology-
intensive manufacturing industries and is positively
correlated with growth in total factor productivity
across countries and industries. Finally, the ratios
between the stocks of R&D capital and tangible
capital suggest marked differences in how R&D and
tangible capital are combined in production.
