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., & 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

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

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.