The expanded and updated 4th edition of the book “Trade Unionism and Collective Bargaining Economy” written by Istanbul Commerce University, Department of Economics (English) Lecturer Prof. Dr. Yusuf Balcı was published by Seçkin Publishing. The book mainly includes economic analyzes of trade unionism and collective bargaining, which is the most important area of ​​the industrial relations system that emerged after the industrial revolution, and its transformation in the information society. The book is the main source of lectures on Labor Economics, Unionism and Collective Bargaining Economics taught at universities