Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
I. Introduction, 439.—II. Least-cost number of firms in a multiproduct industry, 441.—III. Shape of the M locus: economic interpretation, 446.—IV. Regions in which some specified number of firms may be optimal, 450.—V. Scale of demand and cost-minimizing market form, 454.—VI. The single-product case, 455.—VII. Conclusion, 460.—Appendix A: Proof of Theorem Ib, 462.—Appendix B: Proof of Theorem 3, 464.