Abstract
David Audretsch has made significant contributions to our understanding of the role of knowledge spillovers for innovations and growth. This paper follows this line of research in examining the link between education, human capital spillovers and productivity. Human capital spillovers arise when the presence of individuals with high levels of human capital makes other workers more productive. If higher education is associated with human capital spillovers, a social return to education is generated. We use firm-level production functions to estimate the social returns to higher education in Sweden. The data include more than 50,000 Swedish firms and cover the period from 2001 to 2010. This was a period when Sweden experienced a rapid regional expansion of higher education, and the share of Swedish workforce with higher education has increased dramatically over the past decades. We find economically significant spillover effects from highly educated workers and that a 1 % increase in the share of educated workers is associated with a 0.4–1.0% increase in productivity. When controlling for university-based R&D and business services, the spillover effect is significantly reduced. We also find an economically significant decline in the spillover effect over the 10 year period. According to our estimations, the spillover is positive at the beginning of the period and gradually diminishes by the end of the period, such that we no longer find any significant spillover effect. We interpret this as marginally diminishing social returns to education. The results have policy implications for higher education (We gratefully acknowledge financial support from the Marianne and Marcus Wallenberg foundation and the Kamprad family foundation. We also grateful for the valuable comments provided by Pontus Braunerhjelm, Gunnar Eliasson and Hulya Ulku. Peter S. Karlsson has provided valuable statistical assistance).
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- 1.
The time period is also characterized by a boom in the economy that ended in the last half of 2008, with a share recession in 2009. This has influenced our choice of stochastic frontier model and not using a regular panel model.
- 2.
There are a large number of agglomeration studies that look at spatial concentration and its economic effects on productivity. The core idea is that agglomerations of production factors (people or human capital) enhance productivity. For evidence using the estimates of productivity effects, see Ciccone and Hall (1996), Henderson (2003) and Moretti (2004a).
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- 4.
Morreti’s (2004a) estimates are robust to different assumptions of technology, omitted variables and various other specifications.
- 5.
Further decomposition is possible; however, this drastically reduces the sample. For empirical reasons, we therefore abstain from further decomposition.
- 6.
Depending on the analysis, we use either SIC at either the 2 or 3 digit level. When necessary, to economize on the degrees of freedom, we use the SIC2 digit.
- 7.
Adding this constraint does not significantly alter the results. We therefore only report results without constraints on the coefficients. For further results see appendix.
- 8.
Most R&D reported is conducted at a relatively small number of large firms, and of these investments, about 75% takes place in one of the three largest regions in Sweden (Stockholm, Malmö and Gothenburg). These three regions also have significantly higher shares of the educated workforce compared to the rest of Sweden.
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Appendices
Appendix 1
Translog production function
We also estimate following translog production function:
Where Xi denotes production factors. The total factor productivity, A, is modeled as in the Cobb-Douglas case, and we include the same effects as above. The translog model is estimated under the standard assumptions: ∑i β i = 1 and ∑i β ij = ∑j β ji = 0.
Appendix 2
As a robustness check, we estimate the spillover effects at county level. There are 290 counties in Sweden, compared to 72 local labor market regions.
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Eklund, J.E., Pettersson, L. (2019). Education, Human Capital Spillovers and Productivity: Evidence from Swedish Firm Level Production Functions. In: Lehmann, E., Keilbach, M. (eds) From Industrial Organization to Entrepreneurship. Springer, Cham. https://doi.org/10.1007/978-3-030-25237-3_20
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