This Time it's Different: Legitimacy and the Limits of Differentiation after Brexit

British political debate since the EU referendum has hinged on what type of Brexit to pursue: hard or soft. Yet, unlike in instances of treaty rejection, the EU made no counter offer to avoid a breakdown in relations that would follow the hardest of exits. This remarkable unity in not discounting the possibility of a hard Brexit demonstrates that UK withdrawal is very distinct from previous wrangles over EU reform. Drawing on the work of Kissinger, this article argues Brexit is a revolutionary act that denies the legitimacy of the EU order. Hence this process does not conform to other episodes of differentiation. When Westminster sought opt‐outs, it did not reject the core principles of integration. By not seeking to oppose a hard Brexit, Brussels has forced the UK government to find a new legitimising principle to govern EU–UK relations, transferring the burden of adjustment to London.     

Contending regionalisms: hubs and challengers in the Americas and the Asia-Pacific

As regions become more institutionalized, they are characterized by two competing trends. First, key regional institutions can become hub institutions that act as transmitters of a comprehensive set of norms. Second, as regional institutions increase in number, regions themselves are liable to become more fragmented. How these trends have played out is explored in two key regions, the Americas and the Asia-Pacific. It is concluded that regions are not static entities but are ever-changing structural arrangements. Hub institutions can be challenged and the consequences can be significant as regions gain in importance on the international stage.     

Regression Discontinuity Designs Based on Population Thresholds: Pitfalls and Solutions

In many countries, important features of municipal government (such as the electoral system, mayors' salaries, and the number of councillors) depend on whether the municipality is above or below arbitrary population thresholds. Several papers have used a regression discontinuity design (RDD) to measure the effects of these threshold‐based policies on political and economic outcomes. Using evidence from France, Germany, and Italy, we highlight two common pitfalls that arise in exploiting population‐based policies (compound treatment and sorting), and we provide guidance for detecting and addressing these pitfalls. Even when these problems are present, population‐threshold RDD may be the best available research design for studying the effects of certain policies and political institutions.     

Do generic gTLDs require their own ex ante regulation?

This article reviews ICANN's treatment of applications to create new Top Level Domains based on generic terms (e.g. .book, .motorcycles), reserved for exclusive use by the applicant. It finds little evidence in past domain name history that such registrations represented a risk to competition. Had applicants made abusive use of their domains then existing law would have provided appropriate remedies in any case. Theory suggests that such a novel market was unsuitable for prospective regulatory action and that, by converting potential monopolies into potential cartels, ICANN's action may even have made the competition risk worse.