The virtual disappearance of moderate and cross-pressured members from the US Congress is analysed in this article. There were substantial numbers of these partisan non-conformists in both parties and in both chambers until the early 1980s when the middle began to shrink. This trend continued and accelerated in the 1990s. Partisan non-conformists disappeared through replacement and conversion. When moderate and cross-pressured members left Congress, their replacements were much more likely to be mainstream partisans in the 1980s and 1990s than they had been in earlier decades. The occurrence of some type of conversion (a shift towards the party's ideological mainstream or a party switch) is also much more common in recent decades. We present evidence that the shrinking middle in Congress resulted from electoral changes.

The debate about electoral reform in Britain has taken a new turn with the latest upsurge in mid-term support for the Liberals, the launch of the SDP, and the immediate electoral success of the Alliance between the two parties. We do not deal here with the durability or consequences of these developments. We are concerned with the electoral system that they put under challenge. This concern is the more important because, as we shall show here, the working of that system altered fundamentally between 1955 and 1979. Before considering how fragile ‘the mould of British polities’ is or whether it should be broken, it is appropriate to reconsider and remeasure the precise shape and texture of that mould, and establish what are the chemical bonds which have determined those characteristics.

In order to understand how electoral rules affect political outcomes, we need to know whether and how voters react to them. The ability of voters to react strategically to electoral rules may be limited in cases where the electoral rules are complex. In this article, I look for evidence of rational reactions to a moderately complex electoral system, that used in the Federal Republic of Germany. By examining district-level election results, I find substantial evidence that voters do react rationally, despite the complexity of the two-vote system. The rational reactions by voters lead to excess first votes for incumbents, for candidates of the major party expected to be in government, to major-party candidates in close races and to major-party candidates in districts with significant minority-party support. The findings support both the general claim that voters can react strategically to complex electoral rules, and more specific claims about the value of the two-vote ballot in Germany.

This article presents evidence that both micro (individual level) and macro (aggregate level) theories of public opinion overstate the importance of political sophistication for opinion change. It is argued that even the least politically sophisticated segment of society receives messages about the economy and uses this information to update attitudes about political issues. To test this hypothesis, the authors have used General Social Survey data to construct a 31-item measure of policy mood, disaggregated by political sophistication, that spans from 1972 to 2004. They found that all the subgroups generally changed opinion at the same time, in the same direction, and to about the same extent. Furthermore, they show that groups at different sophistication levels change opinions for predominantly the same reasons.

EC directives must be transposed into the national legal order of the memberstates within a specified deadline. Although member states are obliged to notifytheir transposition measures, they often fail to comply with these deadlines.Distinguishing between domestic and EU-related factors, this study examinestransposition failure and delay of EC directives from 1986 to 2002. Notificationfailure is found to be more likely when there is conflict between the memberstates during the EU legislative process. National patterns of transpositiontimeliness are shown to vary significantly, and higher levels of complexity andincreased use of parliamentary legislation, as well as more federalist andpluralist structures, contribute to delayed compliance.

Japan uses simple plurality elections with multi-member districts to elect its lower house. This system tends to produce competition among n + 1 candidates per district. This ‘law of simple plurality elections’ is a structural generalization akin to Duverger's Law. Evidence from Japan also indicates that the causal mechanism behind this ‘law’ is not strategic voting, although strategic voting occurs, but elite coalition building. It is further argued that the connection between structure and behaviour is learning and not rationality. Equilibria are reached slowly through trial and error processes. Once reached, the equilibrium is unstable because parties and candidates try to change it. Even without rational actors and stable equilibria, however, this structural generalization accurately describes the dynamics of electoral competition at the district level in Japan.

The received wisdom in international relations suggests that we can best account for the foreign policies of small states by examining structural/systemic rather than domestic level factors. This article challenges this scholarly consensus. The distribution of power and the balance of threat do influence domestic institutional formation and change in emerging states. However, the subsequent military strategies of these weak states are likely to reflect such domestic institutional choices in a number of important and predictable ways. The article tests this argument against pre-1900 US domestic regime change and foreign security policy. The historical evidence suggests that while international preconditions were critically linked to constitutional reform, the institutional structures and rules of democratic presidentialism affected both the timing and substance of US military strategies in later periods. The US case study provides a springboard for speculating on the international context of democratization in Eastern Europe and the long-term foreign-policy consequences of this domestic regime choice.

Elections are thought to bolster legitimacy by providing fair mechanisms for selecting leaders. Survey data from more than 20,000 respondents in twelve African countries demonstrate that in Africa losers of elections are less inclined to trust their political institutions, consent to government authority or feel that voting matters. Contrary to initial expectations, however, losers are more willing than winners to defend their institutions against manipulation by elected officials. Losers in Africa seem critical of their institutions, but nonetheless willing to protect them, while winners seem submissive subjects, granting unconditional support to their current leaders. Finally, losers are much more likely than winners to denounce flawed elections, but losers have additional reasons to doubt the legitimacy of their current institutions.

Existing empirical models of international co-operation emphasize domestic determinants, although virtually all theories of international relations focus on interdependencies between countries. This article examines how much states’ linkages with the international system, relative to domestic factors, such as income and democracy, influence the dynamics of global governance efforts. To this end, we study the ratification behaviour of 180 countries vis-à-vis 255 global environmental treaties. Except for integration into the world economy, which affects co-operative behaviour negatively, our results show that international factors have a stronger and more positive impact on cooperative behaviour than domestic factors. This implies that Galton’s advice not to examine the effects of internal and external variables in isolation is also useful in the study of international politics.

Aggregation means the organization of elements of a system into patterns that tend to put highly compatible elements together and less compatible elements apart. Landscape theory Predicts how aggregation will lead to alignments among actors (such as nations), whose leaders are myopic in their assessments and incremental in their actions. The predicted configurations are based upon the attempts of actors to minimize their frustration based upon their pairwise Propensities to align with some actors and oppose others. These attempts lead to a local minimum in the energy landscape of the entire system. The theory is supported by the results of two cases: the alignment of seventeen European nations in the Second World War and membership in competing alliances of nine computer companies to set standards for Unix computer operating systems. The theory has potential for application to coalitions of political Parties in parliaments, social networks, social cleavages in democracies and organizational structures.

This article asks why some ethnically distinct regions fight fiercely to secede while others struggle to save the same multinational state. It tests competing explanations using a new dataset containing forty-five cases, significantly more than any previous study in the Soviet setting. The empirical results confirm arguments that the most separatist regions tend to be those possessing the most wealth, containing the least assimilated ethnic groups and already enjoying the greatest levels of autonomy. Demonstration effects are also found to be powerful. No support is found for prominent theories pointing to group upward mobility and ‘skill sets’ as being decisive. Group histories of grievous exploitation or national independence are found not to explain patterns of secessionism.

Voting power indexes such as that of Banzhaf are derived, explicitly or implicitly, from the assumption that all votes are equally likely (i.e., random voting). That assumption implies that the probability of a vote being decisive in a jurisdiction with n voters is proportional to 1/√n. In this article the authors show how this hypothesis has been empirically tested and rejected using data from various US and European elections. They find that the probability of a decisive vote is approximately proportional to 1/n. The random voting model (and, more generally, the square-root rule) overestimates the probability of close elections in larger jurisdictions. As a result, classical voting power indexes make voters in large jurisdictions appear more powerful than they really are. The most important political implication of their result is that proportionally weighted voting systems (that is, each jurisdiction gets a number of votes proportional to n) are basically fair. This contradicts the claim in the voting power literature that weights should be approximately proportional to √n.

If voters use information about the economy to assess the competence of incumbents, a connection between economic conditions and incumbent success should only be discernible in settings where public policy might plausibly affect the economy, and where the assignment of government responsibility is relatively straightforward. Applying this logic to gubernatorial elections in the United States, we test the following hypothesis: the connection between economic conditions and incumbents' vote shares is mediated by the structure of the state economy. This hypothesis is premised on the idea that voters understand that raw macroeconomic aggregates – when driven by factors like weather, commodity prices and federal policy – are poor signals of incumbent performance. Using data from gubernatorial elections held between 1950 and 1998, we show that the connection between macroeconomic indicators and incumbent success is weak in states dominated by natural resources and farming but quite strong elsewhere. This finding helps explain why earlier studies found no connection between state-level economic conditions and gubernatorial elections.

A six-wave 2005–09 national panel survey conducted in conjunction with the British Election Study provided data for an investigation of sources of stability and change in voters’ party preferences. The authors test competing spatial and valence theories of party choice and investigate the hypothesis that spatial calculations provide cues for making valence judgements. Analyses reveal that valence mechanisms – heuristics based on party leader images, party performance evaluations and mutable partisan attachments – outperform a spatial model in terms of strength of direct effects on party choice. However, spatial effects still have sizeable indirect effects on the vote via their influence on valence judgements. The results of exogeneity tests bolster claims about the flow of influence from spatial calculations to valence judgments to electoral choice.

The most characteristic, distinctive and persistent belief of American corporate executives is an underlying suspicion and mistrust of government. It distinguishes the American business community not only from every other bourgeoisie, but also from every other legitimate organization of political interests in American society. The scope of direct and indirect government support for corporate growth and profits does not belie this contention; on the contrary, it makes it all the more paradoxical. Why should the group in American society that has disproportionately benefited from governmental policies continue to remain distrustful of political intervention in the economy?

It is of course possible to attribute at least some of the public distrust of government by members of the business community to political posturing; continually to denounce government is a way of assuring that the policies of government reflect corporate priorities. Wilbert E. Moore suggests:

When businessmen did, and do, make extreme, ideologically oriented pronouncements on freedom from political interference, it is surely fair to say that they do not mean to be taken with total seriousness…Often, in fact, the sayers and the doers are not the same people… [T]he extreme spokesmen of business ideology are more often lawyers and public relations men than they are practicing executives…These are generally men, who like professors and Congressmen, ‘have never met a payroll’.

To what extent does public support for subnational officials fluctuate in response to local rather than national performance? Are the policy failures of subnational officials reliably punished by voters? Drawing upon both individual and aggregate level data, this article attempts to shed new light on these questions about the politics of decentralization by exploring electoral outcomes and public opinion at the subnational level in Argentina. Consistent with referendum voting models, this analysis suggests that the fate of candidates in both national and subnational elections is shaped by the performance of the incumbent presidential administration. Moreover, to the extent that subnational performance has an electoral impact, voters do not necessarily respond in ways that enhance electoral accountability. Voters not only blame and reward subnational officials for national performance, but also attribute responsibility for subnational performance to national authorities. The implications with respect to the impact of decentralized decision making on democratic accountability are decidedly mixed and anything but consistent with the argument that decentralization results in a closer match between citizen preferences and the allocation of public resources.

Voluntary compliance is an important aspect of strong tax regimes, but there is limited understanding of how social norms favoring compliance emerge. Using novel data from urban Nigeria, where tax enforcement is weak, this article shows that individuals with a positive experience of state services delivery are more likely to express belief in an unconditioned citizen obligation to pay tax. In addition to support for this fiscal exchange mechanism, social context is consequential. Where individuals have access to community-provided goods, which may substitute for effective state services provision, they are less likely to adopt pro-compliance norms. Finally, the article shows that norm adoption increases tax payment. These findings have broad implications for literatures on state formation, taxation and public goods provision.

Coalition formation has been the subject of much theoretical and empirical work in the past decade or so. The theories that have been tested all rest, one way or another, upon assumptions about the ways in which the payoff accruing to a particular coalition is distributed among its members. Yet much less empirical work has been done on the process of payoff distribution. Thus some of the fundamental assumptions of coalition theories, at least in terms of their practical application to coalition governments, have been more scantily tested. Several theories of payoff distribution have been recently developed, however. It is the purpose of this article to test the application of these theories to the practice of coalition government in Europe.

President Carter will perhaps be remembered most for his perceived incompetence, an impression produced largely by his inability to forge coalitions in Congress, and by his failure as an ‘outsider’ to intervene effectively in the established policy-making processes in Washington. In his farewell address, Carter alluded to what he believed to be the source of his troubles – the fragmentation of power and decision-making exploited by influential special interests. Carter believed that he was trapped in a web of organized groups allied with well-placed congressional and bureaucratic sympathizers seeking to protect their narrowly defined interests and frustrating his own broader vision of the public good.

Does exposure to political violence prompt civilians to support peace? We investigate the determinants of civilian attitudes toward peace during ongoing conflict using two original panel datasets representing Israelis (n=996) and Palestinians in East Jerusalem, the West Bank and Gaza (n=631) (149 communities in total). A multi-group estimation analysis shows that individual-level exposure to terrorism and political violence makes the subject populations less likely to support peace efforts. The findings also confirm psychological distress and threat perceptions as the mechanism that bridges exposure to violence and greater militancy over time. The study breaks ground in showing that individual-level exposure – necessarily accompanied by psychological distress and threat perceptions – is key to understanding civilians’ refusal to compromise in prolonged conflict.