A global decline in research productivity? Evidence from China and Germany
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Research productivity in Germany and China has declined by 5% and 3% annually since 2010, respectively, despite significant R&D investments.
Philipp Boeing and Paul Hünermundd, "A global decline in research productivity? Evidence from China and Germany,"Economics Letters, December 2020, https://www.sciencedirect.com/science/article/abs/pii/S0165176520304067












Ed Comment:“We saw in recent paper that the quality of researchers declines as the share of researchers increases. For the same reason (.i.e., a shortage of talent) every increase in a research is a decrease in the quality of people employed to other critical endeavors such as commercialization.”
New paper replicates Bloom'sAre Ideas Getting Harder To Findfor China and Germany and finds evidence of a decline in research productivity in both countries providing support to Bloom's work
What they did, “….Following Bloom et al., we calculate the research productivity parameter,𝛼𝛼, in equation (1),by taking the average of output growth per firm and decade (1990s, 2000s, and 2010s), and dividing by average input levels. As measures for output we use sales revenue, employment, revenue labor productivity, and market capitalization (monetary units deflated by the GDP implicit price deflator). Market capitalization is not available for Germany’s predominantly privately owned companies and we substitute it with sales revenue from innovative products and services. Regarding inputs, Bloom et al. (2020) show theoretically that research inputs in (1) can be measured by𝑆𝑆̃𝑡𝑡, the“effective number of researchers”, by deflating a firm’s R&D expenditures, 𝑆𝑆with the nominal wage rate for high-skilled workers in the economy…”
Bottom line, “….Table 1 depicts our results. In Germany, the effective number of researchers grows at an annual rate of 1.5% to 4.9%. Like Bloom et al.’s findings for the U.S., however, such input growth is not met with a proportional growth in output.As a result, we find declines in research productivity ranging from3.7% to 7.8% per year. The average of the four estimates, equal to -5.225%, implies that research productivity halves every fourteen years, which is very close to the estimated halflife of thirteen years for the U.S. (Bloom et al., 2020). In China, we observe an extremely rapid expansion of research activities during the first and second decades of the 21st century, with growth rates for effective researchers ranging between 21% and 24%.5 The resulting output growth, again, is not proportional to such inputs, which is reflected in a decrease in research productivity estimated between 15.4% and 29.3%. Averaged across estimates, this amounts to a decline of -23.775% per year, or a half-life of around 3 years….”
Note they theorize that China might see a quicker decline in research productivity due to internal constraints, “….Overall, ideas are not only getting harder to find in the U.S., but that the same holds true for the largest R&D-spending countries in Europe and Asia respectively. Although estimates are difficult to compare, due to differences between data sources, negative growth rates are, in fact, remarkably similar across Germany and the U.S. China has undergone an even larger decline in research productivity in the last two decades, which reflects its rapid transformation from principally capital-driven growth toward more innovation-led growth. It remains to be seen whether China will start to follow productivity trends of advanced economies. The increasingly inward looking and mission-driven nature of Chinese innovation policy (Chinese State Council, 2020), however, suggests that research productivity might continue to decline faster in China than elsewhere. Knowledge production at the technology frontier crucially relies on creative freedom, serendipitous discovery, and exchange…”
