In a continuous-time model of capital accumulation, there are convexity or concavity conditions on benefit and cost functions which ensure that dynamical necessary conditions for optimality are also sufficient. Non-convexities can occur in various ways: the Hamiltonian can fail to be concave...

This paper examines an industry where output is determined collusively, with output shares allocated on the basis of relative capacity. Capacity is chosen non-cooperatively, providing an apparently clear incentive for firms to install excess capacity. Although excess capacity equilibria (ECE)...

This paper characterizes precisely the optimal capital policy for a firm facing a non-price rationing constraint in the market for investment funds. With this particular capital market imperfection firms may generally 'overinvest' relative to a perfect market case, rather than underinvest as...

Conventional cost-benefit analysis has generally not taken into account the care in which the project is sufficiently large that its introduction would have significant general equilibrium effects. This paper examines rules that indicate whether such large projects should be accepted or...

An applied general equilibrium model of a small open economy is described. The model incorporates industrial organization structures heretofore absent from applied G.E. trade models. Scale economies, product differentiation and explicit price setting are novel model features. Some illustrative...

Evaluating projects on the basis of aggregate (unweighted) costs and benefits is a wide spread practice in cost-benefit analysis. This practice continues despite serious flaws in the "compensation principle", which is the usual welfare theoretic basis to justify the procedure. For this reason we...

Consider the problem of regulating supply of a homogeneous good in a market with more than one supplier and a large number of buyers. When prices are regulated and set under conditions of imperfect information and uncertainty supply and demand will almost never be equal ex post. In order to...