According to Nordhaus, the optimal life of a patent T* trades off the ``embarrassment" of monopoly with motivating innovation, given that imitators would otherwise copy inventions and, in competing with innovators, reduce their profit hence incentive to innovate. To test this argument, we...

In some recent merger cases the European Commission has relied on quantitative economic techniques in the competitive assessment of horizontal mergers. These techniques have ranged from the use of merger simulation models (for both differentiated and homogenous goods), to the deployment of...

We analyze the impact of a merger on firms’ incentives to innovate. We show that the merging parties always decrease their innovation efforts post-merger while the outsiders to the merger respond by increasing their effort. A merger tends to reduce overall innovation. Consumers are always...

Donors who try to impose policy conditionality on countries receiving their aid commonly face confflicting incentives between using aid to induce income-increasing reforms and using aid to assist low-income countries: this confflict can lead to a time-consistency problem. This paper o¤ers a...

This paper presents a principal-agent model of IMF conditional lending, in the aftermath of a "capital-account" liquidity crisis. We show that traditional ex-post conditonality can be effective in safeguarding the Fund's resources, allowing for the provision of efficient emergency lending and...

One of the main elements of the current reform of electricty trading in the UK is the change from a uniform price auction in the wholesale market to discriminatory pricing. We analyse this change under two polar market structures (perfectly competitive and monopolistic supply), with demand...

We study the impact of electricity divestments in a stylised model where a dominant producer faces a competitive fringe with the same cost structure and is forced to sell some of its capacity. For a given demand level, the divestment which achieves the greatest reduction in prices can be several...

We study alternative market power mitigation measures in a model where a dominant producer faces a competitive fringe with the same cost structure. We characterise the asset divestment by the dominant firm which achieves the greatest reduction in prices. This divestment entails the sale of...

This paper examines the case for government-led smoothing of domestic petroleum prices in the face of volatile international prices. Governments in most developing and transition countries engage in petroleum price smoothing, as the survey of country practice carried out for this paper shows....