Ferrier GD, S Grosskopf, KJ Hayes and S Yaisawarng (1993). “Economies of Diversification in the Banking Industry – a Frontier Approach.” J Monetary Economics 3: 229-249.

Ferrier GD, S Grosskopf, KJ Hayes and S Yaisawarng (1993). “Economies of Diversification in the Banking Industry – a Frontier Approach.” J Monetary Economics 3: 229-249.

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