1. Industrial Diversity in Urban Areas: Alternative Measures and Intermetropolitan Comparisons
2. [2]M. E. Conroy "The Optimal Diversification of Regional Industrial Structures," paper presented at the 1972 Annual Meetings of the Econometric Society, Toronto, Canada; 1972 .
3. [3]M. E. Conroy "Optimal Regional Industrial Diversification, A Portfolio-Analytic Approach," unpublished Ph.D. dissertation, The University of Illinois at Urbana-Champaign, 1972 .
4. [4]D. Goldfarb "GRADMAX, A Variable Metric Algorithm for Solving Nonlinear Programming Problems with Linear Constraints," 1971 (mimeographed).