Vetsikas, A., Mertzanis, C., and Pavlopoulos, A. (2026). National innovation systems and firms’ capital investment around the world: a N-tuple helix approach. Small Business Economics. https://doi.org/10.1007/s11187-026-01195-7
Vetsikas, A. (2026). The politics of innovation in Japan: retention capacity, leakage, and lock-in in the national innovation system. The Japanese Political Economy, 1-28. https://doi.org/10.1080/2329194X.2026.2636817
Pavlopoulos, A., Mertzanis, C. and Vetsikas, A. (2026). Governance through taxation: Fiscal efficiency and its disciplinary effect on earnings management. Abacus (accepted).
Mertzanis, C., Vetsikas, A., Pavlopoulos, A. and Ahmed, M. (2026). Climate laws and firms' access to energy. Energy, 140222. https://doi.org/10.1016/j.energy.2026.140222
Mertzanis, C., Houcine, A., Pavlopoulos, A., Vetsikas, A. and Kampouris, I. (2025). Financial Technology and Environmental Performance: International Evidence. International Journal of Finance & Economics, https://doi.org/10.1002/ijfe.70065
Vetsikas, A. and Founta, K. (2025). Assessing the Greek National Innovation System During the Economic Crisis: Insights from a Global Comparative Analysis Using a N-Tuple Helices Composite Index. Journal of the Knowledge Economy. https://doi.org/10.1007/s13132-025-02839-x
Vetsikas, A., Stamboulis, Y. and Georgatzi, V. (2024). Exploring the coevolution of heterogeneous actors in national innovation systems: a system dynamics analysis of Finland. Review of Evolutionary Political Economy, 5(3), 581-610. https://doi.org/10.1007/s43253-024-00133-1
Vetsikas, A. (2024). Assessing the Performance of National Innovation Systems with a Helix-Based Composite Indicator: Evidence from 24 European Countries. Eastern European Economics, 62(1), 18-49. doi.org/10.1080/00128775.2023.2167722
Mertzanis, C., Pavlopoulos, A., Vetsikas, A., Reppas, D. and Hamill, P. (2023). Religion and the financing of corporate investment around the world. International Review of Financial Analysis, 90, 102923. doi.org/10.1016/j.irfa.2023.102923
Vetsikas, A. and Stamboulis, Y. (2023). A conceptual framework for modeling heterogeneous actors' behavior in national innovation systems. Journal of Evolutionary Economics, 33(3), 773-796. doi.org/10.1007/s00191-023-00829-3
Vetsikas, A. and Stamboulis, Y. (2023). Does innovation activity affect trade openness? An ARDL bounds testing approach for 10 European countries. The Journal of International Trade & Economic Development, 32(1), 163-188. doi.org/10.1080/09638199.2022.2080855
Βέτσικας, Α., και Σταμπουλής, Γ. (2022). Μοντελοποιώντας τη δυναμική των εθνικών συστημάτων καινοτομίας. Το Βήμα των Κοινωνικών Επιστημών, 19(74), 51–80. doi.org/10.26253/heal.uth.ojs.sst.2021.673 (in Greek)
Georgatzi, V., Stamboulis, Y. and Vetsikas, A. (2020). Examining the determinants of CO2 emissions caused by the transport sector: Empirical evidence from 12 European countries. Economic Analysis and Policy, 65, 11-20. doi.org/10.1016/j.eap.2019.11.003
Dimitriadis, S., Blanas, N., Aspridis, G. and Vetsikas, A. (2016). Organizational Change Management: Delineating Employee Reaction to Change in SMEs Located in Magnesia. Academic Journal of Interdisciplinary Studies, 5(1), 309-318. 10.5901/ajis.2016.v5n1p309
Markatou, M. and Vetsikas, A. (2015). Innovation and Crisis: An Analysis of its Impact on the Greek Patenting Activity. Procedia - Social and Behavioral Sciences, 195, 123-132. doi.org/10.1016/j.sbspro.2015.06.419