Strategic public investment in research and development (R&D) can strengthen the economy almost immediately while encouraging private sector investment for years to come, according to a new study led by the University of Southampton. Conducted in collaboration with UCL and the World Bank and published in The Economic Journal, the research finds that government-funded R&D is a particularly productive form of public investment. Rather than displacing private innovation, it stimulates additional business investment and economic activity even before the full technological benefits of research are realised.
Lead researcher Dr Vincenzo De Lipsis says the findings have important implications for governments seeking to stimulate growth while managing constrained public finances. “At a time when governments are seeking to rebuild industrial capacity while operating within tight fiscal constraints, our findings show that the composition, design and credibility of public investment can be as important as its overall size,” he says. The team set out to understand how quickly public R&D generates wider economic benefits, how large those benefits become, and whether they endure over time.
To answer these questions, the researchers analysed more than 280 quarterly economic observations from the US Bureau of Economic Analysis spanning 1947 to 2017. The dataset included public and private investment, government expenditure, tax revenues and gross domestic product (GDP). The United States’ long history of public investment in innovation enabled the team to examine how government-funded R&D influences the economy over several decades and to trace both its short- and long-term effects.
The analysis showed that public R&D delivers substantially stronger and longer-lasting economic benefits than conventional government spending. A key reason is its ability to “crowd in” private investment by encouraging businesses to increase their own research spending. The researchers estimate that every additional dollar invested in public R&D generates between $2.60 and $4.30 in additional economic output within a year, highlighting its effectiveness as an engine of economic growth.
The study also suggests that the impact of public R&D begins before projects are fully underway. When governments make clear, credible long-term commitments to research and innovation, businesses may adjust their investment plans in anticipation, reducing uncertainty and increasing confidence. According to the authors, governments are uniquely positioned to stimulate innovation because they can support high-risk, long-term research and use innovation-oriented procurement to help create new markets and strengthen productive capacity.
The researchers conclude that public and private R&D should be viewed as complementary rather than competing forms of investment. Public funding is well suited to tackling long-term, high-risk challenges and laying the scientific and technological foundations for innovation, while private firms are better placed to transform those discoveries into commercially viable products and services. Together, sustained public investment and private sector innovation can deliver stronger economic growth, greater resilience and lasting benefits for society.
More information: Vincenzo De Lipsis et al, Macroeconomic Effects of Public R&D, The Economic Journal. DOI: 10.1093/ej/ueag061
Journal information: The Economic Journal Provided by University of Southampton