Indirect public control of self-managed monopolies

How difficult is it and by what means is it possible to control a self-managed firm that has some monopoly power? To answer this question, classical modeling options are adopted: static framework, maximization by the firm of value added per capita. Three assumptions are added: perfect information on technologies by the Center, availability of unlimited lump-sum transfers and linear excise taxes, and market clearing. Attention is thus restricted to allocational problems, ruling out concern for distribution and regulation.