1. Acs, Z. J., & Sanders, M. (2008). Intellectual property rights and the knowledge spillover theory of entrepreneurship. Working paper. Jena: Max Planck Institute of Economics.
2. Acs, Z. J., Audretsch, D. B., Braunerhjelm, P., & Carlsson, B. (2004). The missing link: The knowledge filter and entrepreneurship in endogenous growth. Discussion Paper no. 4783. London, UK: Center for Economic Policy Research.
3. Acs, Z. J., Audretsch, D. B., & Evans, D. S. (1994a). The determinants of variations in self-employment rates across countries and over time. Discussion Paper no. 871. London, UK: Centre for Economic and Policy Research.
4. Acs, Z. J., Audretsch, D. B., & Feldman, M. P. (1994b). R&D spillovers and recipient firm size. The Review of Economics and Statistics, 76, 336–340.
5. Acs, Z. J., & Audretsch, D. B. (1988). Innovation in large and small firms: An empirical analysis. The American Economic Review, 78, 678–690.