1. 1R. G. D. ALLEN,Mathematical Analysis for Economists(London: MacMillan, 1938 ).
2. 2---,ANDJ. R. HICKS, "A Reconsideration of the Theory of Value, Pt. II,"Economica(February-May 1934 ), 196-219.
3. The Role of Imports from the Newly-industrializing Countries in U.S. Production
4. Estimation and Hypothesis Testing in Singular Equation Systems with Autoregressive Disturbances
5. 5C. BLACKORBY, and R. R. RUSSELL, "The Partial Elasticity of Substitution," Discussion Paper No. 75-1, Department of Economics, University of California, San Diego, 1975 .