The authors are indebted to E. M. Babb, V. W. Ruttan, F. E. Walker, and L. T. Wallace, Department of Agricultural Economics, Purdue University, for helpful comments and criticism in drafting this note.
The authors are indebted to E. M. Babb, V. W. Ruttan, F. E. Walker, and L. T. Wallace, Department of Agricultural Economics, Purdue University, for helpful comments and criticism in drafting this note.
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