Rothchild, Brian J. 1977. "Fishing Effort." In J. A. Gulland (Ed.), Fish Population Dynamics. New York: John Wiley and Sons, Inc. Schaefer, Milner B. 1954. "Some Aspects of the Dynamics of Populations Important to the Management of Commercial Marine Fisheries." Inter-American Tropical Tuna Commission, Bulletin 1(2):27-56. Schaefer, Milner B. 1957. "Some Aspects of the Dynamics of Populations Important to the Management of Commercial Marine Fisheries," Journal of the Fishery Research Board of Canada 14(5):669-681. Scott, Anthony. 1955. "The Fishery: The Objectives of Sole Ownership," Journal of Political Economy 64(April):116-124. Segura, Edilberto L. 1973. "Optimal Fishing Effort in the Peruvian Anchovetia Fishery." In Adam A. Sokoloski (Ed.), Ocean Fishery Management: Discussion and Research. National Oceanic and Atmospheric Administration Technical Report NMFS Circ-371. Smith, Vernon L. 1969. "On Models of Commercial Fishing," American Economic Review 58(June):409-431 Theil, Henri. 1971. Principles of Econometrics. New York: John Wiley and Sons, Inc. Tomek, William G. and Kenneth L. Robinson. 1972. Agricultural Product Prices. New York: Cornell University Press. U.S. Department of Commerce. 1976. "Fishery Conservation and Manage- ment Act of 1976 Fact Sheet." Washington: U.S. Government Print- ing Office. U.S. Department of Labor, Bureau of Labor Statistics. 1979. Wholesale Prices and Price Indexes, Supplement 1977 and Producer Prices and Price Indexes. Washington: U.S. Government Printing Offices, Superintendent of Documents. U.S. National Marine Fisheries Service. 1976. Unpublished data on 1976 operating units gear for Regions 4 and 5. U.S. National Marine Fisheries Service. 1957-1976. Fishery Statistics of the United States. Washington: U.S. Government Printing Office, Annual Issues (formerly U.S. Bureau of Commerce Fisheries). U.S. National Marine Fisheries Service. 1979. Unpublished preliminary landings data for Grouper and Red Snapper. Zellner, Arnold. 1962. "An Efficient Method of Estimating Seemingly Unrelated Regressions and Tests for Aggregation Bias," Journal of the American Statistical Association 57(June):348-368.