New insight into market concentration and competition: Use of Barnett’s variable profit function to measure market structure in banking
Previous research on market concentration in banking is heavily tilted towards using deposits as the underlying variable for measuring market concentration. This paper proposes a change in methodology by replacing deposits with the Variable profit function based on Barnett and Hahm’s Economic model for Financial Institutions, used in their 1994 paper. This model has also been successfully used in Dr. William A. Barnett’s successive research. Hancock 1997 also proposes using a similar methodology for modelling banks as Economic firms. Results change dramatically once deposits are substituted by variable profits, and a confounding puzzle is solved, involving one of South Asia’s thriving banking markets.