Kostis, P. C., & Kafka, K. I. (2021). Uncertainty and Culture. In European Social Survey Report – Exploring public attitudes, informing public policy: Selected findings from the first nine rounds. Publisher's Version

Κωστής, Π. Χ. (2021). Οι Επιδράσεις της Οικονομικής Αβεβαιότητας στο Λιανικό Εμπόριο της Ελληνικής Οικονομίας. In Αρανίτου Β. (Επιμ.) Η ιστορία, η οικονομία και οι μετασχηματισμοί του λιανικού εμπορίου και η ελληνική περίπτωση. Εκδόσεις Κέρκυρα - Economia Publishing.

Kostis, P. C. (2021). Uncertainty Shocks, Cultural Behaviors and Economic Development. Journal of Business Accounting and Finance Perspectives. Publisher's Version

Petrakis, P. E., Kafka, K. I., Kostis, P. C., & Valsamis, D. G. (2021). Greek Culture after the Financial Crisis and the Covid-19 Crisis: An Economic Analysis. ISBN 978-3-030-81017-7: Palgrave MacMillan.

Kostis, P. C. (2021). Economic Development and Performance of Eurozone Economies: The Growing Imbalances During the Crisis. Journal of the Knowledge Economy.

Kostis, P. C. (2021). Culture, innovation, and economic development. Journal of Innovation and Entrepreneurship, 10.

Kafka, K. I., & Kostis, P. C. (2021). Post-materialism and economic growth: Cultural backlash, 1981?2019. Journal of Comparative Economics, 49, 901-917.