Munich Personal RePEc Archive

Secondary Products, By-products and the Commodity Technology Assumption

Londero, Elio (1998): Secondary Products, By-products and the Commodity Technology Assumption. Published in: Economic Systems Research , Vol. 11, No. 2 (1999): pp. 195-203.

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Abstract

A more general method for preparing commodity by commodity input-output tables under the commodity technology assumption is presented for the case when there are produced and non-produced by-products, originating in both principal and secondary production. Existing methods of the same family are shown to be special cases of the one presented. A numerical example (not included) shows that incorrect model specification is a sufficient condition for unwarranted negative coefficients. Finally, the model is shown to satisfy desirable properties of an input-output system.

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