1. Formulation and estimation of stochastic production function models;Aigner;Journal of Econometrics,1977
2. Economies of scale, concentration and the condition of entry in 30 manufacturing industries;Bain;American Economic Review,1954
3. On the proper cost tests for natural monopoly in a multiproduct industry;Baumol;American Economic Review,1977
4. Institutions of higher education as multiproduct firms: economies of scale and scope;Cohn;Review of Economics and Statistics,1989