[en] In light of large costs, potential benefits, and uncertainties surrounding breeder development, many questions need to be addressed concerning the roles of government, equipment vendors, and electric power utilities in financing, owning, and managing breeder development. The study assesses nine institutional arrangements, ranging from those with heavy private sector initiative to complete government ownership and control. These arrangements are evaluated in terms of: the degree of clearly defined centralized management control that would be afforded; the effectiveness of cost control; the strength of the vendor-utility interface; the value of information produced for subsequent commercialization; the ease of financing; the prospects for risk-sharing; and overall plausibility. Some time-slippage at this stage in order to ensure strong private sector involvement might well accelerate commercialization in the longer run. The alternative is a government-directed program that might proceed faster in the next decade but subsequently encounter more barriers to commercial adoption