LSE British Election Conference 2010

Over the weekend the LSE’s Government Department hosted its Undergraduate Election Conference for 2010

Tunable interactions between vortices and a magnetic dipole

The interactions between vortices in a thin superconducting film and one magnetic dipole in the presence of a magnetic field applied parallel to the film surfaces are studied theoretically in the London limit. The dipole magnetic moment is assumed to have constant magnitude and freedom to rotate. The pinning potential for an arbitrary vortex configuration is calculated exactly. It is found that, due to the dipole freedom to rotate, the pinning potential differs significantly from that for a permanent dipole. In particular, its dependence on the applied field is non-trivial and allows for tuning of the pinning potential by the applied field. The critical current for one vortex pinned by the dipole is obtained numerically as a function of the applied field and found to depend strongly on the field. Order of magnitude changes in the critical current resulting from changes in the direction and magnitude of the applied field are reported, with discontinuous changes taking place in some cases. The effect of vortex pinning by random material defects on the critical current is investigated using a simple model. It is found that if random pinning is weak the critical current remains strongly dependent on the applied field. Possible applications to vortices pinned by arrays of magnetic dots are briefly considered.Comment: 9 pages, 9 figures. Submitted to Phys. Rev.

Engineering a venture capital market: lessons from the American experience

The venture capital market and firms whose creation and early stages were financed by venture capital are among the crown jewels of the American economy. Beyond representing an important engine of macroeconomic growth and job creation, these firms have been a major force in commercializing cutting edge science, whether through their impact on existing industries as with the radical changes in pharmaceuticals catalyzed by venture-backed firms commercialization of biotechnology, or by the their role in developing entirely new industries as with the emergence of the internet and world wide web. The venture capital market thus provides a unique link between finance and innovation, providing start-up and early stage firms - organizational forms particularly well suited to innovation - with capital market access that is tailored to the special task of financing these high risk, high return activities

The Political Ecology of Takeovers: Thoughts On Harmonizing the European Corporate Governance Environment

Economic policy debate in the United States during the 1980s focused on the dynamics of bidder and target tactics in hostile takeovers. Confronted with the largest transactions in business history, financial economists took advantage of developments in econometric techniques to conduct virtually real time studies of the impact on firm value of each new bidder tactic and target defense. For courts and lawyers, hostile takeovers subjected standard features of corporate law to the equivalent of a stress x-ray, revealing previously undetected doctrinal cracks. Congress held seemingly endless hearings on the subject, although managing to enact only relatively innocuous tax penalties on particular defensive tactics the public found especially offensive. State legislatures, closer to the political action, acted more substantively, if less wisely. Whether or not takeovers created new wealth they did result in its transfer, and at least one of the parties from whom wealth was transferred – target management – had remarkable influence in state legislatures. When labor also came actively to oppose hostile takeovers, the coalition was virtually unstoppable. The decade saw some thirty-four states pass more than sixty-five major laws restricting corporate takeovers, including states discouraging partial offers and front-end loaded offers. The 1980s have now closed transactionally as well as chronologically. The first quarter of 1991 marked the lowest level of merger and acquisition activity since the first quarter of 1980. The passing of this remarkable decade invites a broader perspective, which can be helpfully thought of as the political ecology of takeovers. An ecological perspective builds on the proposition that phenomena are embedded in interactive systems – a rich web of mutually dependent relationships. Thus, a seemingly independent event cannot be fully evaluated without understanding how it relates to the environmental forces to which it was a response and which, in turn, respond to it. What the narrow focus of the 1980s debate missed was an appreciation of the complex economic corporate governance and political environments in which hostile takeovers are embedded. Corporate acquisitions are a response to real conditions in the economic environment. The choice among acquisition techniques, most importantly between friendly and hostile transactions, depends both upon the economic motivation for the transaction and upon conditions in the corporate governance environment. Finally, conditions in the corporate governance environment are directly influenced by politics; both what is allowed and prohibited is defined, in the first instance, by legislation. My goal in this article is two-fold. I begin by sketching the political ecology of takeovers in the United States – the interaction of economics, corporate governance and politics that shaped the experience of the 1980s. I then make a tentative effort at applying the insights gained from an ecological perspective to the current endeavor to change dramatically the European corporate governance environment through the harmonization of takeover and company law in the European Community. Sheltered by the cloak of political naivete commonly allowed those attempting comparative analysis from a distance, I will argue that an ecological understanding of takeovers suggests a different approach than that reflected so far in the debate over the terms of harmonization. This approach is based on what I term the mutability principle