Party unity in parliamentary democracies: A comparative analysis

The level and causes of party unity are under-researched topics in parliamentary democracies, particularly in comparative perspective. This article presents a non-formal model explaining party unity in legislative voting as the result of individual legislators' decisions reacting to the incentives and constraints created by their respective institutional environments. Hypotheses derived from the model are tested against empirical data on party unity in 11 western parliamentary democracies since 1945. On the system level, central party control over nominations and intra-parliamentary resources as well as the strength of parliamentary committees with regard to policy decisions are shown to affect party unity as expected by the model. On the level of individual parties, governing parties are less unified than opposition parties and larger parties show higher unity than smaller ones. Both results shed doubt on frequent claims in the literature.     

Transatlantic cooperation,alliance politics and extended deterrence: European perceptions of nuclear weapons

This article discusses the North Atlantic Treaty Organization (NATO) debate regarding American nonstrategic nuclear weapons (NSNW) in Europe, given the broad spectrum of views on nuclear issues when comparing individual member states. What is striking is the gap between public attitudes – which are broadly hostile to keeping NSNW in Europe – and elite opinion, which privileges the maintenance of NATO commitments to preserve alliance cohesion. To better understand this tension, this article dissects the elements of extended nuclear deterrence in Europe, addressing the difficulties associated with current nuclear-sharing arrangements. For some NATO states, the alliance's nuclear weapons are a political liability, since nuclear sharing clashes with international disarmament and nonproliferation commitments. For other NATO members, maintaining the status quo is preferable, as long as there is no alliance-wide consensus on the question of NSNW. These debates have been put to rest, for now, with NATO's Deterrence and Defense Posture Review, which reaffirmed the purpose of the alliance's nuclear weapons. However, these divisive debates point to more fundamental issues in alliance management, namely the credibility of American commitments, the sustainability of extended nuclear deterrence in Europe and the inevitable political tensions these questions provoke at the domestic level for NATO allies.     

Estimating the potential impact of nonvoters on outcomes of parliamentary elections in proportional systems with an application to German national elections from 1949 to 2009

“If turnout was 100%, would it affect the election result?” is a frequently asked research question. So far, the question has been primarily answered regarding the changes in the distribution of votes. This article extends the analysis to changes in the distribution of seats and government formation. It therefore proposes a method that factors in apportionment methods, election threshold, sizes of parliaments, leverage of nonvoters, closeness of election results, and individual characteristics of nonvoters. The method is then applied to German national elections from 1949 to 2009. The application shows that Germany's Social Democratic Party (SPD) would have gained from the counterfactual participation of nonvoters, although usually not enough to result in a government change. However, the elections of 1994 and 2005 show evidence that such a change could have happened.     

Between Appeasement and Belligerent Moralism: The Evolution of Moral Conduct in International Politics

Public Choice - What are the conditions for ``moral'' conduct in internationalpolitics to be viable? This question is explored by modelingregional conflicts as a two-stage game in which...     

Correction to: Taxing Higher Incomes: What Makes the High-Income Earners Consent to More Progressive Taxation in Latin America?

Political Behavior - The article Taxing Higher Incomes: What Makes the High-Income Earners Consent to More Progressive Taxation in Latin America?, written by Sarah Berens and Armin von Schiller,...