We use a vertical product differentiation model under partial market coverage to study the social welfare optimum and duopoly equilibrium when convex costs of quality provision are either fixed or variable in terms of production. We show the following new results. First, under fixed costs, the...

We address the question of how lending market competition, measured by the bargaining power of banks, affects the agency costs of debt finance. It is shown that intensified lending market competition will lead to lower lending rates and investment return distributions which are shifted towards...