R&D and Productivity in the UK: evidence from firm-level data in the 1990s

The UK`s business R&D (BERD) to GDP ratio is low compared to other leading economies, and the ratio has slowly declined over the 1990s. This paper uses data on large UK firms to analyse the link between R&D and productivity over the 1989-2000 period. Using a production function approach, and a sample of up to 719 firms, various different samples and estimators are used to assess the elasticity of, and rate of return to, R&D. The results indicate that UK returns to R&D are similar to returns in other leading economies. Furthermore, the returns to R&D have been relatively stable over the 1990s. There is no evidence to suggest that stock market listed firms, or firms with higher past profitability, have significantly different returns. Overall, the results suggest that the low BERD to GDP ratio in the UK is unlikely to be due to direct financial or human capital constraints (as these imply finding relatively high rates of return). Instead, the low BERD to GDP ratio appears to reflect low (perceived) opportunities by firms and the inability of firms to manage R&D to generate value. The paper provides some, tentative evidence, that high rates of competition in the science-based sector are associated with low returns to R&D.