How effective is terrorism? This question has generated lively scholarly debate and is of obvious importance to policy-makers. However, most existing studies of terrorism are not well equipped to answer this question because they lack an appropriate comparison. This article compares the outcomes of civil wars to assess whether rebel groups that use terrorism fare better than those who eschew this tactic. I evaluate the advantages and disadvantages of terrorism relative to other tactics used in civil war. Because terrorism is not a tactic employed at random, I first briefly explore empirically which groups use terrorism. Controlling for factors that may affect both the use of terrorism and war outcomes, I find that although civil wars involving terrorism last longer than other wars, terrorist rebel groups are generally less likely to achieve their larger political objectives than are nonterrorist groups. Terrorism may be less ineffective against democracies, but even in this context, terrorists do not win.

This article argues that specific characteristics of the domestic legal institutions of Islamic law states shape these states' choices of peaceful resolution methods in territorial disputes. After providing original data on the characteristics of Islamic legal structures, I systematically compare pertinent rules of international dispute resolution methods and Islamic law. I demonstrate empirically that not all Islamic law states view international settlement venues in the same way. Secular legal features, such as constitutional mentions of education, supreme court, or peaceful settlement of disputes have the power to attract these states to the most formal international venues—arbitration and adjudication. On the other hand, Islamic law states whose legal system is infused with Islamic religious precepts are attracted to less-formalized venues.

Democracies are more supportive of US positions on important votes in the UN General Assembly than of nondemocracies. Is this because democracies share common perspectives, or does this pattern reflect coercion? Since 1985, US law has stipulated that the US State Department identify important votes and that aid disbursements reflect voting decisions. To unravel these alternative explanations, we introduce a strategic statistical model that allows us to estimate voting preferences, vulnerability to influence, and credibility of linkage, which are theoretical quantities of interest that are not directly observable. The results reject the hypothesis of shared democratic values: poor democracies have voting preferences that are more oppositional to US positions than autocracies, and they are more willing than autocracies to take symbolic stands that may cost them foreign aid. Democracies support US positions, however, because US aid linkages are more credible when directed toward democratic countries. Splitting the sample into Cold War and post–Cold War segments, we find that the end of the Cold War changed the way US linkage strategies treated allies and left- and right-leaning governments, but the effects of democracy remained constant.

This paper blends recent research on hierarchy and democratization to examine the theoretical and empirical costs of treating regime type exogenously in the literature most identified with studying its impact on international politics. It argues that the apparent peace among democratic states that emerges in the aftermath of World War I is not caused by domestic institutional attributes normally associated with democracy. Instead, this peace is an artifact of historically specific great power settlements. These settlements shape subsequent aggregate patterns of military conflict by altering the organizational configuration of the system in three critical ways—by creating new states, by altering hierarchical orders, and by influencing regime type in states. These claims are defended with a series of tests that show first how the statistical relationship between democracy and peace has exhibited substantial variation across great power orders; second, that this statistical relationship breaks down with theoretically motivated research design changes; and third, that great powers foster peace and similar regime types within their hierarchical orders. In short, the relationship between democracy and peace is spurious. The international political order is still built and managed by great powers.

Contemporaries and historians often blame the errors and tragedies of US policy during the Cold War on a dominant narrative of national security: the “Cold War consensus.” Its usual periodization, according to which it came together in the late 1940s and persisted until the late 1960s when it unraveled amidst the trauma of the Vietnam War, fits well with a common theory of change in ideas and discourse. That theory expects stasis until a substantial unexpected failure (in this domain, military defeat) discredits dominant ideas and unsettles dominant coalitions. However, systematic data reveal the standard history of this important case to be wrong. Based on a large-scale content analysis of newspaper editorials on foreign affairs, this article shows that the Cold War narrative was narrower than conventional accounts suggest, that it did not coalesce until well into the 1950s, and that it began to erode even before the Vietnam War's Americanization in 1965. To make sense of this puzzle, I develop an alternative theory of the rise and fall of the narratives that underpin and structure debate over national security. Rooted in the dynamics of public narrative and the domestic politics of the battlefield, the theory argues that military failure impedes change in the narrative in whose terms government officials had legitimated the mission, whereas victory creates the opportunity for departures from the dominant narrative. Process-tracing reveals causal dynamics consistent with the theory: failure in the Korean War, which might have undermined Cold War globalism, instead facilitated the Cold War narrative's rise to dominance (or consensus); and the triumph of the Cuban Missile Crisis made possible that dominant narrative's breakdown before the upheaval of Vietnam. This hard and important case suggests the need to rethink the relationship between success, failure, and change in dominant narratives of national security—and perhaps in other policy domains as well.

An open question in nuclear deterrence theory is whether and how the balance of military power affects the dynamics of escalation. The balance of military strength plays virtually no role in standard accounts of brinkmanship. But this is largely by assumption and seems incompatible with an apparent trade-off between power and risk that decision makers have faced in some actual crises. This paper incorporates this trade-off in a modified model of nuclear brinkmanship. A main result is that the more likely the balance of resolve is to favor a defender, the less military power a challenger brings to bear. The model also formalizes the stability-instability paradox, showing that a less stable strategic balance, that is, a sharper trade-off between power and risk, makes conflict at high levels of violence less likely but conflict at lower levels more likely. The analysis also helps explain the incentives different states have to adopt different nuclear doctrines and force postures.

Does improved communication provided by modern cellphone technology affect the rise or fall of violence during insurgencies? A priori predictions are ambiguous; introducing cellphones can enhance insurgent communications but can also make it easier for the population to share information with counterinsurgents and creates opportunities for signals intelligence collection. We provide the first systematic micro-level test of the effect of cellphone communication on conflict using data on Iraq's cellphone network (2004–2009) and event data on violence. We show that increased mobile communications reduced insurgent violence in Iraq, both at the district level and for specific local coverage areas. The results provide support for models of insurgency that focus on noncombatants providing information as the key constraint on violent groups and highlight the fact that small changes in the transaction costs of cooperating with the government can have large macro effects on conflict.

Affect and emotion are key elements of our lived experience as human beings but currently play little role in how we theorize actorhood in international relations. We offer six amendments for integrating affective dynamics into existing conceptions of individual-level actorhood in IR. From these amendments emerge the theoretical micro-foundations upon which we build propositions concerning potential collective-level affective dynamics and political strategies. We illustrate the analytical payoff of our proposals by examining the aftermath of the terrorist attacks on 11 September 2001. By amending existing understandings of actorhood to include human affective experience, we can integrate and make sense of a variety of psychological, social, and political consequences stemming from the attacks, both within the United States and internationally.

Despite mixed empirical evidence, in the past two decades central bank independence (CBI) has been on the rise under the assumption that it ensures price stability. Using an encompassing theoretical approach and new yearly data for de jure CBI (seventy-eight countries, 1973–2008), we reexamine this relationship, distinguishing the role of printing less money (discipline) from the public's beliefs about the central bank's likely actions (credibility). Democracies differ from dictatorships in the likelihood of political interference and changes to the law because of the presence of political opposition and the freedom to expose government actions. CBI in democracies should be directly reflected in lower money supply growth. Besides being more disciplinarian, it also ensures a more robust money demand by reducing inflation expectations and, therefore, inflation. Empirical results are robust and support a discipline effect conditioned by political institutions, as well as a credibility effect.

War is expensive—troops must be equipped and weapons must be procured. When the enormous borrowing requirements of war make the sovereigns' credibility problem more difficult, central banks enhance a government's ability to borrow. By being the sole direct purchaser of government debt, the central bank increases the effective punishment that can be imposed on the government for defaulting on the marginal lender. This increases lenders' confidence that the government will be punished in case of default, making lenders willing to purchase the debt at a lower rate of interest. The sovereign, dependent on the low borrowing costs offered by the central bank, has an incentive to retain the bank. Data covering the nineteenth and early twentieth centuries reveal that possessing a central bank lowers the sovereign's borrowing costs, particularly during times of war.

Following older debates in international relations literature concerning the relative importance of domestic versus systemic factors, newer debates emphasize interdependence among states and the complex interactions between systemic and domestic factors. As globalization and democratization advance, theories and empirical models of international politics have become more complicated. We present a systematic theoretical categorization of relationships between domestic and systemic variables. We use this categorization so that scholars can match their theory to the appropriate empirical model and assess the degree to which systemic factors affect their arguments. We also present two advances at the frontier of these empirical models. In one, we combine hierarchical models of moderating relationships with spatial models of interdependence among units within a system. In the other, we provide a model for analyzing spatial interdependence that varies over time. This enables us to examine how the level of interdependence among units has evolved. We illustrate our categorization and new models by revisiting the recent international political economy (IPE) debate over the relationship between trade policy and regime type in developing countries.

When it comes to linkages between migration and the global allocation of foreign development assistance, the size of the immigrant population from a recipient country residing in a donor country is an important determinant of dyadic aid commitments. Two complementary hypotheses probe this relationship. First, donors use foreign aid to achieve their broader immigration goals, targeting migrant-sending areas to increase development and decrease the demand for entry into the donor country. Second, migrants already residing in the donor country mobilize to lobby for additional aid for their homeland. Empirical tests on a large sample of country pairs made up of twenty-two donors and more than 150 recipients over the period 1993 to 2008 show robust support for these hypotheses.

Scholarship on the determinants of foreign direct investment (FDI) flows has produced valuable insights into the role of host state characteristics and home-host relations. This study draws attention to another factor in investment decisions—the political and economic relations that home and host states maintain with third-party states. More narrowly, we focus on how investors respond to their home-state's imposition of economic sanctions against a trading partner. Greater economic integration has allowed states to use economic sanctions more frequently in recent decades. At the same time, economic sanctions are thought to have a distorting effect on global trade and financial flows as firms and governments adjust to new constraints. We argue that as firms at home in the sanctioning state respond to coercive measures against a trading partner by looking for alternative sources of profit, they will shift investments to states that can provide indirect access to the sanctioned economy. In particular, those states that are perceived as prospective sanctions-busters—major trading partners of the sanctions target or states with a history of sanctions-busting behavior—will benefit disproportionately from the misfortune of others. We test this conjecture using data on US economic sanctions and global flows of US FDI from 1966 to 2000. The findings reveal that investor decision making in part responds to political developments beyond the home-host dyad.