Scholars have long debated the causes of late third party state joining in ongoing inter-state wars. This research has generally concluding that peace-time conditions, measured in terms of: third party capabilities; proximity to warring states; and inter-state alliances, are determining factors in the decision to join. However, these studies utilize theories derived from static pre-war measures of capabilities and motivation to explain late joining; indeed, the same measures that fail to predict participation at war's outset. Further, extant research has no explanation for why weak and non-proximate states every participate. Existing theory thus fails to provide a comprehensive explanation of joining behavior. This project contends that a resolution lies the interaction between pre-war conditions and intra-war events. Intra-war events that are allowed to vary on a per battle basis, including change in combat location and alliance entry and exit from combat, reveal new information about the war and its progress, thereby forcing third party states to recalculate their initial decision to abstain in relation to their pre-existing situation. Incorporation of intra-war processes helps to better explain decisions by third party states to join ongoing inter-state wars late in their development, and why states that frequently choose to abstain (e.g., weak …

This dissertation seeks to test the proposition that public opinion is a driving force in integration, and thus examines the effect of euroscepticism on EU integration. Utilizing an understanding of integration as the process of European states achieving similar legal, social, cultural, political and economic policy outcomes while ceding greater policy power to European institutions, the relationship between aggregate level euroscepticism in EU member states (the United Kingdom, Germany, Ireland, Greece, Spain, France, Italy, the Netherlands, Austria, and Sweden) and speed of compliance with EU policies is examined. More specifically, this dissertation examines the relationship between aggregate level euroscepticism in an EU member state, and the speed at which that state transposes EU directives. In testing this relationship a number of contextual conditions are examined, including the role of issue salience, domestic party systems, and electoral conditions. The findings of this dissertation suggest that the widely held belief that public opinion is driving European integration may be false.