Article

CATASTROPHIC SUCCESS? FOREIGN-IMPOSED REGIME CHANGE AND CIVIL WAR

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Abstract

Foreign-imposed regime change (FIRC) has been argued to have a pacifying effect on interstate relations: when a victorious power changes the composition of its defeated rival's government, a recurrence of armed conflict between them becomes very rare. Yet the domestic effects within states that experience FIRC may be less benign. This paper investigates the extent to which FIRC might be a form of "catastrophic success," dampening international conflict but exacerbating internal conflict. My analysis differentiates between FIRCs that bring entirely new leaders to power versus those that restore a recently overthrown ruler to office. I argue that the former disrupts state power and foments grievances and resentments, whereas the latter does not. Analyzing a dataset of country-years from 1816 to 2008 that includes one hundred FIRCs, I find that only new leader FIRC significantly increases the risk of civil war in the short-term aftermath. New leader FIRC is also especially damaging to the prospects for domestic peace when it is inflicted in conjunction with defeat in an interstate war, and in poor or ethnically heterogeneous countries.

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... impuso un modelo de dominio en múltiples esferas que han abarcado lo económico, lo sociocultural, lo religioso y, si era necesario para imponerse, la manipulación de cambios políticos mayores, llegando al regime change (Downes 2021), e inclusive el uso de la fuerza militar, si se podía elaborar una narrativa que la justificara. Más aún, una forma de mantener el control sobre el resto del mundo habría sido la creación y el sostenimiento de conflictos y tensiones regionales que evitaran el surgimiento de polos alternativos de desarrollo a partir de la colaboración y la confianza entre pares (O'Rourke, 2021). ...
... Western countries) have experienced IIH, this novel interpretation of hierarchy with FIRCs offers new pathways for comprehending the emerging patterns of conflict in the postcolonial age. State instability has been attributed to economic, cultural, structural, systemic, religious, sectarian and internal political structure (democracy vs. authoritarianism) causes (Gent 2008;Peic and Reiter 2010;Savun and Tirone 2012;Downes 2013;Vogt 2018). With a few exceptions (Cunningham 2016, O'Rourke 2017McCormack 2018), many analyses ignore the significant impact of international hierarchies in mobilising patterns of political unrests or civil conflicts. ...
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... Enterline and Greig (2008) show that imposed polities are more likely to face domestic challenges. Downes (2010) finds that 2 Findings in the domain of psychology, microeconomics, and sociology help explain how political dislocation increases the likelihood of resistance. Political dislocation is a perceived negative shift in power compared to the status quo. ...
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... They would also provide at least some ammunition for those involved in the deliberations who were skeptical about the ultimate success of the US intervention in Afghanistan. Downes (2010) finds that foreign imposed regime changes significantly increase the risk of the civil wars in the targets of those changes, especially if leaders brought to power have not previously ruled in those societies, and if the country in question is poor and ethnically heterogeneous. ...
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Resenha do livro: FUKUYAMA, Francis (2006). America at a Crossroad: Democracy, power and the Neoconservative Legacy.
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RESUMEN En el contexto posterior a la Guerra Fría, una creciente conciencia mundial sobre las violaciones de los derechos humanos ha captado la atención de la comunidad internacional más que nunca. El desplazamiento forzado ha creado un desafío sin precedentes y la cuestión de la protección humana se ha convertido en un asunto grave de controversia en la agenda humanitaria, que implica repensar el significado de la soberanía estatal con respecto al suministro de ayuda en crisis humanitarias y el concepto de la Responsabilidad de Proteger, así como la cuestión sobre los criterios fundamentales a los que se recurre para justificar una intervención humanitaria. En el marco de la presente tesis, por lo tanto, será señalada la necesidad urgente de reformas en numerosos ámbitos para poder suministrar el apoyo humanitario a las internally displaced persons (IDP) de forma eficaz y duradera. Asimismo, se mostrará que es imprescindible efectuar cambios en cuanto a una restructuración interna de las Naciones Unidas, en la esfera jurídica y económica, así como en las medidas de protección y seguridad in situ para los desplazados. Será crucial identificar las circunstancias interdependientes entre una intervención humanitaria llevada a cabo en nombre de los derechos humanos y la protección civil, y el impacto que conlleva sobre el desarrollo de una crisis migratoria. Con el ejemplo de Libia, se demostrará cómo se condicionaron la intervención militar por la OTAN en 2011 y la crisis de desplazamiento que ha desencadenado progresivamente tras la caída del régimen de Gadafi y el estallido de la guerra civil en 2014. Partiendo de los orígenes de la crisis humanitaria en Libia, se investigarán las normas vigentes en las relaciones internacionales, el desarrollo de una obligación normativa internacional de protección e intervención humanitaria, los criterios de evaluación de una intervención militar (just cause), la adecuación de la intervención en Libia, así como las causas de la guerra en el país más allá de los motivos oficiales de la seguridad humana y la protección de la población civil. La investigación de los crímenes de guerra cometidos por las partes beligerantes involucradas en el conflicto libio desde 2011, así como el significado de la justicia transicional y la reconciliación nacional para el futuro de la nueva Libia constituyen otros temas centrales. Asimismo, será de interés fundamental examinar la aplicación del sistema internacional de protección y del apoyo humanitario en el caso real de Libia. A este respecto, el análisis práctico del Global Protection Cluster y de los Principios Rectores de los Desplazamientos Internos, así como su implementación sobre el terreno es un aspecto clave. La Libia post-revolucionaria se está enfrentando a desafíos enormes como polarización política, anarquía y la guerra civil continua. Con el fin de alcanzar la paz, seguridad y estabilidad duraderas, Libia todavía deberá emprender amplias reformas legales, judiciales y políticas, fomentar el diálogo nacional y comprometerse a respaldar procesos inclusivos de reconciliación nacional mediante el apoyo de la comunidad internacional, ONGs, las autoridades nacionales y locales, así como la sociedad civil, mujeres y tribus. Palabras clave: desplazamiento interno, Libia, IDP, refugiados, intervención militar, soberanía estatal, Responsabilidad de Proteger, crisis humanitaria, guerra civil, Naciones Unidas, sistema de protección, apoyo humanitario, Principios Rectores de los Desplazamientos Internos, Global Protection Cluster, derechos humanos, derecho internacional, crímenes de guerra, reformas, transición, justicia transicional, reconciliación nacional, paz. ABSTRACT In the post-Cold War context, growing global consciousness of human rights violations has captured the attention of the international community as never before. Forced displacement has created an unprecedented challenge and the issue of human protection has become a serious issue of controversy in the humanitarian agenda. This involves rethinking the meaning of state sovereignty with regard to providing assistance in humanitarian crises, the concept of the Responsibility to Protect and the question of fundamental criteria used to justify humanitarian intervention. Therefore, in the context of this thesis, the urgent need for reforms in many pertinent areas will be demonstrated in order to ensure the provision of humanitarian support to internally displaced persons (IDP) in an effective and enduring manner. Furthermore, the necessity of essential changes in terms of an internal restructuring of the UN, as well as in the legal and economic field, and in the protection and security measures on site for the displaced will be shown. It will be crucial to identify the interdependent circumstances between a humanitarian intervention carried out in the name of human rights and civil protection, and the impact it has on the development of a migratory crisis. Based on the example of Libya, it will be demonstrated how the NATO-led military intervention in 2011 is interrelated with the displacement crisis progressively triggered by the fall of the Gaddafi regime and the outbreak of civil war in 2014. Starting from the origins of the humanitarian crisis in Libya, the following will be explored: the existing standards in international relations; the development of an international regulatory obligation to protect and to intervene on humanitarian grounds; the assessment criteria of a military intervention (just cause); the appropriateness of the intervention in Libya; as well as the causes of the war behind the official reasons of human security and protection of the civilian population. The investigation of war crimes committed by the warring parties involved in the Libyan conflict since 2011, as well as the significance of transitional justice and national reconciliation for the future of the new Libya are further central aspects. In addition, another major concern is to examine the application of the international protection system and humanitarian support in the actual case of Libya. In this regard, the practical analysis of the Global Protection Cluster and the Guiding Principles on Internal Displacement, as well as their implementation on the ground constitutes a key aspect. Post-revolutionary Libya is facing enormous challenges, such as political polarization, anarchy and the ongoing civil war. In order to achieve durable peace, security and stability, Libya must undertake extensive legal, judicial and political reforms, encourage national dialogue and engage in inclusive processes of national reconciliation with the support of the international community, NGOs, national and local authorities, as well as civil society, women and tribes. Keywords: internal displacement, Libya, IDP, refugees, military intervention, state sovereignty, Responsibility to Protect, humanitarian crisis, civil war, United Nations, protection system, humanitarian support, Guiding Principles on Internal Displacement, Global Protection Cluster, human rights, international law, war crimes, reforms, transition, transitional justice, national reconciliation, peace.
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Can foreign invaders successfully exploit industrial economies? Since control over economic resources is a key source of power, the answer affects the likelihood of aggression and how strenuously states should counter it. The resurgence of nationalism has led many policymakers and scholars to doubt that conquest still pays. But, until now, the "cumulativity" of industrial resources has never been subjected to systematic analysis. Does Conquest Pay? demonstrates that expansion can, in fact, provide rewards to aggressor nations. Peter Liberman argues that invaders can exploit industrial societies for short periods of time and can maintain control and economic performance over the long term. This is because modern societies are uniquely vulnerable to coercion and repression. Hence, by wielding a gun in one hand and offering food with the other, determined conquerors can compel collaboration and suppress resistance. Liberman's argument is supported by several historical case studies: Germany's capture of Belgium and Luxembourg during World War I and of nearly all of Europe during World War II; France's seizure of the Ruhr in 1923-24; the Japanese Empire during 1910-45; and Soviet hegemony over Eastern Europe in 1945-89. Does Conquest Pay? suggests that the international system is more war-prone than many optimists claim. Liberman's findings also contribute to debates about the stability of empires and other authoritarian regimes, the effectiveness of national resistance strategies, and the sources of rebellious collective action.
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theoretical rigor and empirical depth to a long-standing question of securities studies. He explores how various government leaders assess the cost of war in terms of domestic politics and their own postwar fates. Goemans first develops the argument that two sides will wage war until both gain sufficient knowledge of the other's strengths and weaknesses so as to agree on the probable outcome of continued war. Yet the incentives that motivate leaders to then terminate war, Goemans maintains, can vary greatly depending on the type of government they represent. The author looks at democracies, dictatorships, and mixed regimes and compares the willingness among leaders to back out of wars or risk the costs of continued warfare. Democracies, according to Goemans, will prefer to withdraw quickly from a war they are not winning in order to appease the populace. Autocracies will do likewise so as not to be overthrown by their internal enemies. Mixed regimes, which are made up of several competing groups and which exclude a substantial proportion of the people from access to power, will likely see little risk in continuing a losing war in the hope of turning the tide. Goemans explores the conditions and the reasoning behind this "gamble for resurrection" as well as other strategies, using rational choice theory, statistical analysis, and detailed case studies of Germany, Britain, France, and Russia during World War I. In so doing, he offers a new perspective of the Great War that integrates domestic politics, international politics, and battlefield developments.
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Death rate from political violence is postulated to vary cross-nationally as a positively accelerated time-lagged function of income inequality and as a nonmonotonic inverted "U" function of regime repressiveness. The former hypothesis is consistent with approaches to the explanation of collective political violence that emphasize the general concept of discontent or, more specifically, relative deprivation; the latter hypothesis is consistent with a political-process version of the resource mobilization approach. In the context of a multivariate model estimated across two decades, 1958-67 and 1968-77, support is found for the inequality hypothesis. Support also is found for the regime repressiveness hypothesis in the decade (1968-77) for which the index of regime repressiveness is available. The U-curve effect of regime repressiveness appears to have stronger impact on variation in rates of deadly political violence than the positively accelerated effect of income inequality.
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Audience costs enable leaders to make credible commitments and to communicate their intentions to their adversaries during a crisis. I explain audience costs by simultaneously modeling crisis behavior and the domestic reelection process. I assume that a leader's ability influences the outcome of a crisis. As such, voters use outcomes as a signal of their leaders' quality. Leaders have incentives to make statements that deter their enemies abroad, since these statements also enhance their standing at home. Yet, such "cheap talk" foreign policy declarations are only credible when leaders suffer domestically if they fail to fulfill their commitments. In equilibrium, false promises are only made by the least competent types of leaders. Leaders that break their promises suffer electorally. Because initial domestic conditions and institutional arrangements affect the vulnerability of leaders to these domestic costs, such factors influence the credibility of policy declarations and, therefore, the crisis outcome.
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The shifting nature of international conflict has prompted a rethinking of the Correlates of War Project's classification of wars. This research note describes the new expanded war typology and the resultant three war data sets. Lists of the qualifying wars in the inter-state, extra-state, and intra-state categories during the 1816-1997 period are appended.
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The empirical literature on civil war has seen tremendous growth because of the compilation of quantitative data sets, but there is no consensus on the measurement of civil war. This increases the risk of making inferences from unstable empirical results. Without ad hoc rules to code its start and end and differentiate it from other violence, it is difficult, if not impossible, to define and measure civil war. A wide range of variation in parameter estimates makes accurate predictions of war onset difficult, and differences in empirical results are greater with respect to war continuation.
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Most tests of hypotheses about the effects of “ethnicity” on outcomes use data or measures that confuse or conflate what are termed ethnic structure and ethnic practice. This article presents a conceptualization of ethnicity that makes the distinction between these concepts clear; it demonstrates how confusion between structure and practice hampers the ability to test theories; and it presents two new measures of ethnic practice—ECI (the ethnic concentration index) and EVOTE (the percentage of the vote obtained by ethnic parties)—that illustrate the pay-offs of making this distinction and collecting data accordingly, using examples from the civil war literature.
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International Security 29.1 (2004) 49-91 When Gen. Eric Shinseki, chief of staff of the U.S. Army, testified in February 2003 that an occupation of Iraq would require "something on the order of several hundred thousand troops," officials within George W. Bush's administration promptly disagreed. Within two days, Secretary of Defense Donald Rumsfeld declared, "It's not logical to me that it would take as many forces following the conflict as it would to win the war"; Deputy Secretary of Defense Paul Wolfowitz characterized Shinseki's estimate as "wildly off the mark." More than a year after the occupation of Iraq began, the debate continues over the requirements and prospects for long-term success. History, however, does not bode well for this occupation. Despite the relatively successful military occupations of Germany and Japan after World War II, careful examination indicates that unusual geopolitical circumstances were the keys to success in those two cases, and historically military occupations fail more often than they succeed. Why do some military occupations succeed whereas others fail? Although the occupation of Iraq has prompted a slew of analyses on op-ed pages, there is almost no academic literature answering this question. The most relevant studies choose "nation building" as their primary subject of interest and focus on liberal democracy and successful economies as key objectives. Nation building, however, is not the central goal of occupations, and, further, not all occupations aim to build nations. Rather, the primary objective of military occupation is to secure the interests of the occupying power and prevent the occupied territory from becoming a source of instability. When creating certain political or economic systems, such as liberal democracy or an open economy, has been the goal of an occupying power, it has been so because it was thought that democracy and open markets would further the occupying power's security goals. Security objectives and nation-building objectives sometimes coexist within occupations, but conflating occupation success with the establishment of liberal democracy and functioning economies is misguided. This study recognizes the different goals of military occupation and includes occupations with objectives other than nation building. Further, in these studies of nation building, the logic of case selection is usually not explicitly presented. Discussions of the current occupation of Iraq often either turn to the relatively successful cases of post-World War II Germany and Japan or randomly select a subset of occupations to examine, but a valid study of occupations must examine both successes and failures. I present a data set of twenty-four military occupations since the Napoleonic Wars, which allows for a more systematic examination of the causes of occupation success and failure. Finally, many studies of nation building offer interesting and provocative arguments, but they stop short of answering the most important questions. For example, a recent RAND study concludes that successful nation building requires a lengthy time commitment, normally at least five years, but that study does not ask what conditions are conducive to occupiers making the costly commitment to a lengthy occupation and to occupied populations accepting the extended presence of a foreign power. I explain why some occupations last long enough to succeed whereas others end prematurely and why some occupations, such as the U.S. occupations of Haiti and the Dominican Republic in the early twentieth century, fail despite their protracted nature. The crux of my argument is that military occupations usually succeed only if they are lengthy, but lengthy occupations elicit nationalist reactions that impede success. Further, lengthy occupation produces anxiety in impatient occupying powers that would rather withdraw than stay. To succeed, therefore, occupiers must both maintain their own interest in a long occupation and convince an occupied population to accept extended control by a foreign power. More often than not, occupiers either fail to achieve those goals, or they achieve them only at a high cost. Three factors, however, can make a successful occupation possible. The first factor is a recognition by the occupied population of the need for occupation. Thus, occupation is more likely to succeed in societies that have been decimated by war and require help in rebuilding...
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This paper examines the relationship between foreign imposed regime change and war participation. The oppertunity and willingness of an opponent to impose a new regime on a war participant affects the likelihood that such a change will occur. Results from a logistic regression model suggest that (1) winning or losing the war, (2) the amount of war costs the participant endures, (3) the power of the participant relative to its opponent, (4) the amount of war costs the opponent endures, (5) the occurrence of a domestic regime change during the war, and (6) the difference between the authority structures of the war participant and its opponent all have a significant and sizable impact on the probability that a war participant endures a foreign imposed regime change. The first three variables measure the opponent's opportunity to force a regime change, while the last three measure its willingness. I suggest that these results increase our ability to evaluate the likely consequences of a war, and may have important implications for our understanding of the decision to enter and terminate a war.
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Since the end of the Cold War the United States has led six major nation‐building operations – that is to say, the use of military force in the aftermath of a conflict to underpin a transition to democracy. In Somalia, Haiti, Bosnia, Kosovo, Afghanistan and most recently Iraq, the US has renewed with varying success a form of activity upon which it had embarked in Germany and Japan at the end of the Second World War. Study of these past missions suggests a host of lessons applicable today in Iraq, and raises the question of why, in light of its substantial and recent experience, the US government's learning curve appears so flat.
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This article proposes that foreign-imposed regime changes (FIRCs) make civil war onset more likely when they damage state infrastructural power, as in the context of interstate war, and when they change the target’s political institutions as well as leadership. Using rare events logit to analyse civil war onset from 1920 to 2004, it is found that interstate war and institutional change are virtually necessary (though not sufficient) conditions for an FIRC to cause a civil war. Many control variables are included. The results are robust to different research design specifications; nevertheless, they cannot confirm that occupation troops make an FIRC more likely to spark civil war.
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International peacebuilding can improve the prospects that a civil war will be resolved. Although peacebuilding strategies must be designed to address particular conflicts, broad parameters that fit most conflicts can be identified. Strategies should address the local roots of hostility; the local capacities for change; and the (net) specific degree of international commitment available to assist change. One can conceive of these as the three dimensions of a triangle, whose area is the "political space"—or effective capacity—for building peace. We test these propositions with an extensive data set of 124 post-World War Two civil wars and find that multilateral, United Nations peace operations make a positive difference. UN peacekeeping is positively correlated with democratization processes after civil war and multilateral enforcement operations are usually successful in ending the violence. Our study provides broad guidelines to design the appropriate peacebuilding strategy, given the mix of hostility, local capacities, and international capacities.
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Researchers typically analyze time-series-cross-section data with a binary dependent variable (BTSCS) using ordinary logit or probit. However, BTSCS observations are likely to violate the independence assumption of the ordinary logit or probit statistical model. It is well known that if the observations are temporally related that the results of an ordinary logit or probit analysis may be misleading. In this paper, we provide a simple diagnostic for temporal dependence and a simple remedy. Our remedy is based on the idea that BTSCS data are identical to grouped duration data. This remedy does not require the BTSCS analyst to acquire any further methodological skills, and it can be easily implemented in any standard statistical software package. While our approach is suitable for any type of BTSCS data, we provide examples and applications from the field of International Relations, where BTSCS data are frequently used. We use our methodology to reassess Oneal and Russett's (1997) findings regarding the relationship between economic interdependence, democracy, and peace. Our analyses show that (1) their finding that economic interdependence is associated with peace is an artifact of their failure to account for temporal dependence yet (2) their finding that democracy inhibits conflict is upheld even taking duration dependence into account.
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Does ethnicity matter for explaining violence during civil wars? I exploit variation in the identity of soldiers who conducted so-called “sweep” operations (zachistki) in Chechnya (2000–5) as an empirical strategy for testing the link between ethnicity and violence. Evidence suggests that the intensity and timing of insurgent attacks are conditional on who “swept” a particular village. For example, attacks decreased by about 40% after pro-Russian Chechen sweeps relative to similar Russian-only operations. These changes are difficult to reconcile with notions of Chechen solidarity or different tactical choices. Instead, evidence, albeit tentative, points toward the existence of a wartime “coethnicity advantage.” Chechen soldiers, enmeshed in dense intraethnic networks, are better positioned to identify insurgents within the population and to issue credible threats against civilians for noncooperation. A second mechanism - prior experience as an insurgent - may also be at work. These findings suggest new avenues of research investigating the conditional effects of violence in civil wars.
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Do superpower interventions to install and prop up political leaders in other countries subsequently result in more or less democracy, and does this effect vary depending on whether the intervening superpower is democratic or authoritarian? While democracy may be expected to decline contemporaneously with superpower interference, the effect on democracy after a few years is far from obvious. The absence of reliable information on covert interventions has hitherto served as an obstacle to seriously addressing these questions. The recent declassification of Cold War CIA and KGB documents now makes it possible to systematically address these questions in the Cold War context. We thus develop a new panel dataset of superpower interventions during the Cold War. We find that superpower interventions are followed by significant declines in democracy, and that the substantive effects are large. Perhaps surprisingly, once endogeneity is addressed, US and Soviet interventions have equally detrimental effects on the subsequent level of democracy; both decrease democracy by about 33%. Our findings thus suggest that one should not expect significant differences in the adverse institutional consequences of superpower interventions based on whether the intervening superpower is a democracy or a dictatorship.
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In most studies of the impact of ethnic diversity on economic growth, diversity is hypothesized to affect growth through its effect on macroeconomic policies. This article shows that most measures of ethnic diversity (including the commonly used ELF measure) are inappropriate for testing this hypothesis. This is because they are constructed from enumerations of ethnic groups that include all of the ethnographically distinct groups in a country irrespective of whether or not they engage in the political competition whose effects on macroeconomic policymaking are being tested. I present a new index of ethnic fractionalization based on an accounting of politically relevant ethnic groups in 42 African countries. I employ this measure (called PREG, for Politically Relevant Ethnic Groups) to replicate Easterly and Levine's influential article on Africa's “growth tragedy.” I find that PREG does a much better job of accounting for the policy-mediated effects of ethnic diversity on economic growth in Africa than does ELF.
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In 2003, American policymakers linked the democratization of Iraq with greater peace, democracy, and prosperity in the Middle East. We elaborate this regional-level policy argument theoretically and test it empirically on a global sample of states for the twentieth century. We differentiate the impact of fully and weakly democratic externally imposed polities (“bright” versus “dim” beacons, respectively) on regional interstate war, democratization, and economic growth. We conclude that (1) bright beacons reduce, while dim beacons increase war; (2) bright beacons do not stimulate democratization, while dim beacons undermine democratization; and (3) bright beacons stimulate prosperity, while dim beacons undermine prosperity.
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Although published works rarely include causal estimates from more than a few model specifications, authors usually choose the presented estimates from numerous trial runs readers never see. Given the often large variation in estimates across choices of control variables, functional forms, and other modeling assumptions, how can researchers ensure that the few estimates presented are accurate or representative? How do readers know that publications are not merely demonstrations that it is possible to find a specification that fits the author's favorite hypothesis? And how do we evaluate or even define statistical properties like unbiasedness or mean squared error when no unique model or estimator even exists? Matching methods, which offer the promise of causal inference with fewer assumptions, constitute one possible way forward, but crucial results in this fast-growing methodological literature are often grossly misinterpreted. We explain how to avoid these misinterpretations and propose a unified approach that makes it possible for researchers to preprocess data with matching (such as with the easy-to-use software we offer) and then to apply the best parametric techniques they would have used anyway. This procedure makes parametric models produce more accurate and considerably less model-dependent causal inferences.
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Civil war is the most prevalent form of large-scale violence and is massively destructive to life, society, and the economy. The prevention of civil war is therefore a key priority for international attention. We present an empirical analysis of what makes countries prone to civil war. Using a global panel data set we examine different determinants of civil war for the period 1960–2004. We find little evidence that motivation can account for civil war risk but we suggest that there is evidence to support our feasibility hypothesis: that where a rebellion is financially and militarily feasible it will occur. JEL classifications: O10, D74.
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This research note develops a new explanation of postwar peace duration: periods of peace following wars last longer when the war ends in foreign-imposed regime change. This study tests this hypothesis on a new data set (an expansion of Fortna's (2004) data) of all periods of peace following interstate war cease-fires, over the period 1914 2001. It also tests for other possible factors affecting postwar peace duration, including international institutions, the revelation of information during war, third-party intervention during war, postwar changes in the balance of power, regime type, past conflict history, and others. The article finds strong support for the central hypothesis that peace lasts longer following wars that end in foreign-imposed regime change. This pacifying effect diminishes over time when a puppet is imposed, but not when a democracy is imposed. There are other results, including that the strength of a cease-fire agreement has almost no impact on peace duration.