1. Bargaining Theory, Trade Unions and Industrial Strike Activity;Ashenfelter;American Economic Review,1969
2. Baah A. Y. (2005) ‘An Empirical Analysis of the Labour Market and Trade Union Effects in Ghana’, D.Phil. Thesis, University of Sussex, Falmer, Brighton, UK.
3. Wage Effects of Unions and Industrial Councils in South Africa;Butcher;Industrial and Labor Relations Review,2001