Morita H (2003). “Analysis of Economies of Scope by Data Envelopment Analysis: Comparison of Efficient Frontiers.” International Transactions in Operational Research 10(4): 393-402.

Morita H (2003). “Analysis of Economies of Scope by Data Envelopment Analysis: Comparison of Efficient Frontiers.” International Transactions in Operational Research 10(4): 393-402.

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