Cooper WW, DKS Park and P Ciurana (2000). “Marginal Rates and Elasticities of Substitution with Additive Models in DEA.” JPA 13(2): 105-123.

Cooper WW, DKS Park and P Ciurana (2000). “Marginal Rates and Elasticities of Substitution with Additive Models in DEA.” JPA 13(2): 105-123.

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