Τσουλφίδης Λ. Συζήτηση σχετικά με τις τάσεις και προοπτικές στο οικονομικό και επιχειρηματικό γίγνεσθαι της Θεσσαλονίκης των αποτελεσμάτων του 21ου ΒΑΡΟΜΕΤΡΟΥ ΕΒΕΘ, 13 Απριλίου 2019. Θεσσαλονίκη Hyatt Regency Hotel.
Secular Stagnation, Stagnating profits and Energy Prices. Keynote Speaker, International Congress of Energy, Economy and Security, 6-7 April, 2019, Istanbul Turkey.
Economic Theory in Historical Perspective. New York University, General Liberal Studies Program, March 7, 2019.
The Greek Economy and the Great Recession. Lecture to students and faculty of the University of Tulsa, May 31, 2018, Athens – Greece.
The Recurrence of Long Cycles: Theories, Stylized Facts and Figures. Buffalo State University of New York, Department of Economics, February 23, 2018.
Innovations, Profits and the US Economy. Buffalo State College, February 22, 2018.
Innovations, Profits and the US Economy. New York University, General Liberal Studies Program, February 13, 2018.