ECONOMIC RESTRUCTURING IN PRIMARY INDUSTRIES - TRANSACTION COSTS AND CORPORATE VERTICAL INTEGRATION IN THE ARIZONA COPPER-INDUSTRY, 1980-1991

The recent restructuring of the copper industry in Arizona offers a un ique opportunity to evaluate the role of transaction costs in the reor ganization of production systems. Contrary to popular assertions that mass production is declining in importance all across the economic lan dscape, our study documents the existence of firms that are exploiting economies of scale and intensifying vertical integration. Firms that dominate the restructuring process are perfecting their core skills in the industry, restoring reliability in the supply of inputs, and harm onizing decisions at each stage in the vertical chain of production. M oreover, these firms intensified vertical integration by reducing tran saction costs. We assess the importance of these cost reductions by co mparing the normative allocations of minesite concentration mill outpu ts to smelters, as generated by a linear programming model that minimi zes transportation, labor, and fixed costs, with actual allocations of outputs in the restructured production system. The results show that costs incorporated in traditional models were not actually minimized. The residuals thus represent transaction costs that are unaccounted fo r by conventional factors-of-production models.