Discussion
Which of the following is the condition(s) of economic viability and technological feasibility of Leontief's static model ?
Answer: D
The conditions of economic viability and technological feasibility of Leontief's static input-output model are the Hawkins-Simon conditions, which require that the principal minors of the matrix (I minus A) be positive so that a non-negative output vector exists for every final demand. The Perron-Frobenius root is a result on the eigenvalues of non-negative matrices, and the Kuhn-Tucker conditions are for non-linear programming. The equality of the primal and dual objective values belongs to linear programming duality. So the keyed answer is option D.
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