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Jessica Di Salvatore and Andrea Ruggeri
Peacekeeping has been one of the main conflict management tools used by the international community to restore or safeguard peace and security. Since 1948, the United Nations has established 70 peace operations and has substantially evolved, adopting approaches to peace that extend beyond purely military concerns. Indeed, the promises of peacekeeping as effective instrument of conflict reduction may, to some extent, explain the evolution toward multidimensional missions and the unprecedented number of peacekeepers deployed in the last decade. As consequence, the growing importance of peacekeeping effectiveness has sparked a new wave of research that empirically investigates whether and under which conditions UN peacekeeping works.
Peacekeepers are mostly deployed in conflict or postconflict environments where violence is either ongoing or lingering. Thus, violence remains a priority for peace missions. Consequently, peacekeeping is deemed successful or effective according to whether it curbs conflict in several dimensions. Effective missions are those responsible for decreasing the intensity of battle violence, protecting civilians, and containing conflict diffusion and recurrence in the postwar phase. Each mission, however, is deployed in different contexts and operates under variable conditions that affect the operation’s capacity to influence conflict. Concerning mission features, peacekeeping success is more likely when large contingents are deployed under robust mandates. Mission type, size, and composition signal credible commitment from the international community and empower peacekeepers to halt violence while guaranteeing the implementation of peace agreements. These nuanced understandings of peacekeeping stem from the availability of new data on both conflict and peace operations at the national and subnational levels of analysis. Moreover, the empirical study of the effectiveness of peace operations has recently been flanked by simulation-based forecasting, field experiments, and surveys investigating local-level outcomes of peace missions.
Unsurprisingly, the focus on violence and conflict outcomes as indicators of success is debatable. First, in dealing with violence, peacekeeping operations produce spillover effects that are largely neglected, such as refugee flows and terrorist violence. Second, given the wide range of functions performed by UN peacekeepers, including electoral assistance, economic reconstruction, and state building, it is reasonable to include these aspects when defining effectiveness. Third, and relatedly, no assessment of short- versus long-term implications of peacekeeping for political, social, and economic development in the host country has been forthcoming. While reducing infant mortality, inequality, and crime are not necessarily tasks for peacekeepers, it is vital to study whether and how UN missions may have shaped the quality of peace in host countries.
Soo Yeon Kim
The World Trade Organization (WTO) dispute settlement system is its judicial arm and enforcement mechanism, designed to assist members in resolving trade disputes that arise between them. Its design reflects a move toward greater legalization in trade governance under the multilateral trade regime. Compared with the dispute settlement system of its predecessor, the General Agreement on Tariffs and Trade (GATT), the WTO’s dispute settlement provided a more structured and formal process with clearly defined stages and more discipline in the timetable of the dispute so as to resolve trade disputes as efficiently as possible. Most important, the WTO’s dispute settlement provides for virtually automatic adoption of panel rulings: a respondent losing a case can block the adoption only if it can persuade all members of the WTO not to do so. The legal basis for the WTO’s dispute settlement system is the Dispute Settlement Understanding (DSU), which provides the principles and procedures by which members may bring their trade disputes to the multilateral trade regime for resolution. Overseeing the dispute settlement process is the Dispute Settlement Body (DSB), which consists of all WTO members and meets regularly to receive and to adopt reports of disputes at their various stages of progress.
How effective is the WTO’s dispute settlement mechanism? Effectiveness can be conceptualized as success in attaining the objectives of the dispute settlement under the WTO in three areas: the efficiency of dispute settlement; inclusiveness of the dispute settlement process, especially as it concerns developing country participation; and compliance with legal obligations resulting from arbitration. The existing scholarship on this topic features key debates and frontiers for future research on firms and global production networks/value chains that have the potential to advance our state of knowledge concerning this “crown jewel” of the multilateral trade regime.
Pellumb Kelmendi and Amanda Rizkallah
Civil war is one of the most devastating and potentially transformative events that can befall a country. Despite an intuitive acknowledgment that civil war is a defining political moment in a state and society’s history, we know relatively little about the legacies of wartime social and political processes on post-war political development. Scholars and practitioners have written extensively on the effects of different war endings and international interventions on post-war political outcomes—particularly as they concern the maintenance of security and stability. However, this scholarship has tended to treat the wartime period as a black box. Until recently, this bias has precluded systematic efforts to understand how the wartime political and social processes and context preceding international interventions and peace agreements have their own autonomous effects on post-war politics. Some of these processes include regional and local patterns of mobilization, armed group structure, political polarization, and violence, among others. Focusing more closely on the post-war effect of variation in wartime processes can not only improve our existing understanding of outcomes such as peace duration and stability but can also improve our understanding of other political development outcomes such as democratization, party building, local governance, and individual political behavior and participation.
However, some scholars have started investigating the effect of wartime processes on post-war political development at three broad levels of analysis: the regime, party, and individual levels. At the regime level, democratization seems most likely when the distribution of power among warring parties is even and in contexts where armed actors find it necessary to mobilize ordinary citizens for the war effort. The transition from armed group to peacetime party has also received attention. Armed groups with sustained wartime territorial control, strong ties with the local population, centralized leadership, and cohesive wartime organizations are most likely to make the transition to post-war party and experience electoral success. Moving beyond case studies to more comparative work and giving greater attention to the precise specification of causal mechanisms would continue moving this research agenda in a productive direction. In addition, some scholars have examined individual behavior and attitudes after civil war. A central finding is that individuals who experience victimization during civil war are more likely to engage in political participation and local activism after the war. Future research should go beyond victimization to examine the effects of other wartime experiences.
Harnessing the insights of the rich literature on the dynamics of civil war and the parallel advances in the collection of micro-level data is key to advancing the research on wartime origins of post-war political development. Such progress would allow scholars to speak to the larger question of how state and society are affected and transformed by the process of civil war.
Conor M. Dowling and Yanna Krupnikov
Since the 1960s there has been an increase in the amount of negative advertising in American campaigns. Although only 10% of advertisements aired in the 1960 campaign were negative, in the 2012 campaign only 14.3% of aired ads were positive. The increase in negative advertising has raised questions about the effects these types of ads may have on the electoral outcomes and the political process at large. Indeed, many voters and political actors have assumed and argued that negative advertising will have negative consequences for American politics. Although many news consumers and people interested in politics make many assumptions about the role of negativity in politics, the effect of campaign negativity on the political process is ambiguous. If there is a relationship between negativity and political outcomes, this relationship is nuanced and conditional. Although negativity may, under certain conditions, have powerful effects on political outcomes, under other conditions the effects of negativity are minimal. Moreover, while there is some research to suggest that this type of campaigning can produce negative consequences, other research suggests that negativity may—at times—be beneficial for the political process.
Politicians mobilize people to vote by devising messages and imparting them to those people. Many studies examine African electioneering through a framework that distinguishes between programmatic, clientelist and charismatic appeals. Some, but not all, African politicians appeal to people by adopting particular policy positions, the strict sense of “programmatic appeals.” However, almost all solicit peoples’ support by stressing their sincere intentions and their abilities to pursue uncontroversial aspects of public policy, otherwise known as “valence appeals.” Parties’ historic records and their locations in government or opposition affect which issues they can claim to own and which they stress in their campaigns.
While appeals over public policy are commonplace in African electoral politics, so too is clientelism. Many politicians give voters gifts, in the form of favorable distributions of public service delivery, in-kind goods, and cash. However, few of these gifts constitute contingent exchanges of goods for votes. Instead, political largesse is used to flatter, to impress and to convince voters of politicians’ virtue. In this respect, public policy and clientelism frequently appear in African elections side-by-side.
“Political appeals” is employed by many as an organizing concept which orders the study of political messages. It sheds light on how electoral politics affects public policy. However, it also obscures. A separate canon of work studies political discourses in sub-Saharan Africa. One of the most studied subjects in this strain of the literature is populism. African populisms have been conceived of by some as discourses that unite disparate groups against an elite, and as an electoral strategy that draws together particular constituencies by others. Whichever definition one takes, African populists are rare. Only a handful have been identified.
Nationalists are much more common in sub-Saharan Africa. Politicians and parties have constructed national missions that act as master discourses, which subsume and order all manner of political issues. Some politicians that employ nationalist discourses stress their liberation credentials as qualifications to govern and delegitimize opponents who did not participate in the struggle. National revolutions or liberations are portrayed as ongoing projects with indefinite points of completion which give nationalism its regenerative qualities. Other nationalisms stress threats from rival groups, whether strangers within the nation’s borders, or nefarious forces abroad.
Likewise, ethnic discourses are commonplace in sub-Saharan Africa, but their rhetorical contents differ. Some valorize an ethnic people. Other express an ethnic group’s victimhood, or grievances, or fear of rival group threats. Equally, the goals that they espouse differ. Some propose compensation, others reconciliation, others still the capture of the central state, the devolution of state power, or the creation of a separate state of their own. Equally, they are contested and used by a variety of actors. Ethnicities are created from both above and below. They are used not only to mobilize people for mass actions to but make normative claims on politicians.
More broadly, politicians strive to develop conceptions of political morality. They present themselves as moral leaders and recharacterize various political issues as questions of morality or moral character. Putting these common discursive frames aside, African politicians employ any number of esoteric discursive frames which are not found elsewhere. Grand discourses aside, African politicians employ numerous rhetorical and symbolic techniques to suggest, reframe, perform and charm.
While messages win people’s support, those messages must be imparted, through mass media or face-to-face contact. Political parties mobilize enormous resources to expose people to their messages on the ground. The ground campaign has received little attention to date, but a scattering of studies show that parties strive to gain local presence. Some establish branches and others recruit local actors. They rely on these local actors to organize their ground campaigns and employ a variety of targeting strategies.
Christopher D. Raymond
A wide body of research has studied the impact of religious cleavages on electoral choice in a range of democracies. This research focuses on two types of religious cleavages. One type of religious cleavage is the confessional cleavage, which is a measure of the center-periphery cleavages. This type of cleavage is measured in surveys using indicators of respondents’ religious identities (e.g., Christian vs. Muslim [when one needs to distinguish between voters of different faiths], Catholic vs. Protestant [when one needs to distinguish between different denominations within the same broader faith], and Presbyterian vs. Methodist [when one needs to distinguish between different traditions]). The other type of religious cleavage is the clerical cleavage, which divides religious from secular (i.e., nonreligious) voters. Clerical cleavages are measured using either a measure of religious behavior (e.g., individuals’ frequency of attendance of religious services or frequency of prayer) or beliefs (e.g., whether and the degree to which one believes in the tenets associated with one’s religious identity). Where such cleavages are present, previous research shows that religious groups tend to vote for parties appealing to their votes, while religious voters behave differently from secular voters.
A wide body of research also examines whether and how the effects of religious cleavages change over time. One line of research argues that the effects of religious cleavages on electoral choices change in response to changes in society and among individuals. For instance, as individuals and society as a whole become more secular, some research argues that religious cleavages impact electoral choices less than more religious societies where religion matters more to individuals. Additionally, as voters become more cognitively sophisticated, voters do not need to rely on religious cleavages, resulting in weaker religious effects on voting behavior. Another line of research argues that the effects of religious cleavages change in response to changes in the messages articulated by political parties: When parties compete on issues relevant to religious voters and maintain organizational ties to religious groups in society, the effects of religious cleavages on voting behavior will be strong; when parties deemphasize religious issues and reduce formal ties to religious organizations, the effects of religious cleavages will weaken. While research suggests both types of changes impact the effects of religious cleavages on electoral choices, more research is needed to determine the extent to which ties between parties and religious voters have weakened, especially after accounting for the impact of religious and parental socialization on the behavior of seculars, as well as the degree to which material satisfaction increases the salience of religious issues for religious voters.
Jeremiah J. Castle
Scholars have identified a variety of mechanisms through which religion could impact vote choice in the United States. Researchers have long recognized that, like other social identities, religion is an important factor in the development of party identification. In the United States, evangelical Protestants and highly committed members of other religious traditions tend to favor the Republican Party, while seculars and low-commitment members of other religious traditions tend to favor the Democratic Party. Religion also impacts views on a variety of issues, including abortion, social welfare policy, and foreign affairs. Under the right circumstances, religious voters may incorporate these policy positions into their vote choice. Finally, a growing body of research recognizes that voters use a candidate’s religious views as a heuristic to infer partisanship, ideology, competence, trustworthiness, and a variety of other traits. Given these numerous paths of influence, it is no surprise that researchers regularly find that religion is an important factor in electoral choice.
Researchers have also identified a variety of ways in which religion can impact turnout, thereby creating a second means for religion to influence American elections. Religion helps in the development of social networks and civic skills, thus reducing the costs of political participation. Religion can also be a factor in the development of sociopsychological traits such as threat, thereby facilitating mobilization. By understanding the capacity of religion to impact both turnout and electoral choice, scholars can better understand the myriad ways in which religion influences elections in the United States.
Stephanie J. Rickard
Policies as diverse as tariffs, exchange rates, and unemployment insurance vary across democratic countries. In an attempt to explain this cross-national variation, scholars have turned to the institutions that govern countries’ elections. The institutions that regulate elections, also known as an electoral system, vary significantly across democracies. Can these varied electoral institutions explain the diversity of policies observed? This question remains unanswered. Despite a growing body of research, little consensus exists as to precisely how electoral institutions affect policy. Why is it so difficult to untangle the effects of electoral institutions on economic policy? One reason for the confusion may be the imprecise manner in which electoral institutions are often measured. Better measures of electoral systems may improve our understanding of their policy effects. Improved theories that clarify the causal mechanism(s) linking electoral systems to policy outcomes will also help to clarify the relationship between electoral systems and policies. To better understand the policy effects of electoral institutions, both theoretical and empirical work must take seriously contextual factors, such as geography, which likely mediate the effects of electoral institutions. Finally, different types of empirical evidence are needed to shed new light on the policy effects of electoral institutions. It is difficult to identify the effects of electoral systems in cross-national studies because of the many other factors that vary across countries. Examining within-country variations, such as changes in district magnitude, may provide useful new insights regarding the effects of electoral institutions on policy.
Electoral violence in Africa has garnered a lot of attention in research on African politics. Violence can be the result of manipulation of the electoral process or a reaction to that manipulation. While there is an agreement to distinguish it from the wider political violence by its timing with elections and motivation to influence their outcome, the analysis of its types, content, and impacts varies. There are different assessments of whether repetition of elections reduces violence or not. Elections in Africa are more often marred with violence than elections in other continents, but there is lots of variation between African countries, within countries, and even from one election to another. In addition to well-judged use and development of the existing datasets, qualitative methods and case studies are also needed. Much of the literature combines both approaches. In the analysis of the factors, causes, and contexts of electoral violence, researchers utilize distinct frameworks: emphasizing historical experiences of violence, patrimonial rule and the role of the “big man,” political economy of greed and grievance, as well as weak institutions and rule of law. All of them point to intensive competition for state power. Preelection violence often relates to the strategies of the government forces and their supporters using their powers to manipulate the process, while post-election riots typically follow in the form of spontaneous reactions among the ranks of the losing opposition. Elections are not a cause of the intensive power competition but a way to organize it. Thus, electoral violence is not an anomaly but rather a manifestation of the ongoing struggle for free and fair elections. It will be an issue for researchers and practitioners alike in the future as well.
Despite scholarly disagreements over the meanings of both the rule of law and emergency, there is broad agreement that emergencies often invite and justify departures from the formal requirements and substantive values identified with the rule of law as a normative ideal. It is often argued that strict adherence to existing laws, which are typically enacted during periods of normalcy in order to prevent arbitrary forms of rule associated with tyranny, could inhibit the government’s ability to respond quickly and effectively to the often unexpected and extraordinary challenges posed by an emergency such as war or natural disaster. Consequently, the temporary use of extraordinary measures outside the law has been widely accepted both in theory and in practice as long as such measures aim to restore the normal legal and political order. However, understandings of the tension between emergency and the rule of law have undergone a significant shift during the 20th century as emergency powers increasingly get codified into law. The use of extralegal measures that violate the formal and procedural requirements of the rule of law is still considered a dangerous possibility. However, as governments have come to rely increasingly on expansions of power that technically comport with standards of legality to deal with a growing list of situations characterized as emergencies, there is concern that extraordinary exercises of power intended to be temporary are becoming part of the permanent legal and political order.
Emerging powers are usually referred to as states whose increasing material capacities and status-seeking strategies may potentially have an impact on the international system and also affect the dominant position of the hegemonic powers therein. The rising of new powers is a recurrent phenomenon in international relations. When talking about emerging powers, scholars associate the words with the so-called BRICS states: Brazil, Russia, India, China, and South Africa. The emergence of BRICS, and especially of China, poses the question of whether the rising process is a peaceful one. Realism, institutionalism, and constructivism have all dealt with the possible systemic impacts of the BRICS states. BRICS nations seem to be reformist rather than disruptive, meaning that they are pushing for the better representation of their self-perceived new status in multilateral institutions rather than challenging the current system per se. In terms of foreign policy, BRICS states interact with well-established powers such as the United States and European ones—herein they display balancing or bandwagoning strategies, as they do also toward each other. Moreover, well-established powers either accommodate or contest the rising process and status claims of these emerging powers. However, BRICS states are also regional powers. Regional peers contest the rising processes of BRICS and particularly claims to global powerhood.
While BRICS can be seen as striving for the reform of multilateral institutions, the traditional view of BRICS as a homogenous force, comprising countries with similar interests, is sometimes misleading. Even though BRICS states have their own institution with a new bank, they also pursue different interests within traditional institutions. Therefore, the existing literature on BRICS is tilted toward systemic and institutional concerns. Although works taking into consideration the interplay between the domestic and international levels in foreign policy analysis do exist, they are not necessarily related to emerging processes and rarely go beyond foreign economic policy issues. People, leaders, and governmental institutions are decision makers or are part of the decision-making process in foreign policy, and thus they form perceptions and act according to how the rising process of the state is unfolding. An integration of the systemic, state, and personal levels captures the essence of the foreign policies of BRICS states in the context of rising and can take into consideration the ups and downs and stalemates of rising-process trajectories in international politics.
Increasingly, scholars are recognizing the influences of emotion on foreign policy decision-making processes. Not merely feelings, emotions are sets of sentimental, physiological, and cognitive processes that typically arise in response to situational stimuli. They play a central role in psychological and social processes that shape foreign policy decision-making and behavior. In recent years, three important areas of research on emotion in foreign policy have developed: one examining the effects of emotion on how foreign policy decision makers understand and think-through problems, another focused on the role of emotion in diplomacy, and a third that investigates how mass emotion develops and shapes the context in which foreign policy decisions are made.
These literatures have benefitted greatly from developments in the study of emotion by psychologists, neuroscientists, and others. Effectively using emotion to study foreign policy, however, requires some understanding of how these scholars approach the study of emotion and other affective phenomena. In addition to surveying the literatures in foreign policy analysis that use emotion, then, this article also addresses definitional issues and the different theories of emotion common among psychologists and neuroscientists.
Some of the challenges scholars of emotion in foreign policy face: the interplay of the psychological and the social in modelling collective emotions, the issues involved in observing emotions in the foreign policy context, the theoretical challenge of emotion regulation, and the challenge of winning broader acceptance of the importance of emotion in foreign policy by the broader scholarly community.
There are lots of ways that emotions have been studied in psychology and various ways that their use has been examined in the context of foreign policy. Perhaps one of the most useful ways to examine the influence of emotion on foreign policy is through the lens of risk and threat assessment. Some approaches to emotion tend to categorize emotions as valence-based, in terms of broad-based positivity or negativity. Certainly, elements of this kind of approach can be useful, particularly in terms of thinking about the ways in which political conservatives appear to have a negativity bias. However, an investigation of discrete emotions allows a more sophisticated and nuanced exploration of the effect of emotion on risk analysis and threat assessment, in particular the effect of fear, anger, and disgust on decision-making under conditions of risky threat. Genetic, as well as environmental, circumstances can influence individual variance in the experience and expression of such emotions, and any comprehensive approach to understanding the influence of emotion on decision-making should take all these factors into account.
Josep M. Colomer
The classical analytical category of “empire,” as opposed to “state,” “city,” “federation,” and other political forms, can account for a large number of historical and current experiences, including the past United States of America, the European Union, Russia, and China. An “empire” has been conceived, in contrast to a “state,” as a very large size polity with a government formed on movable frontiers, with multiple institutional levels, overlapping jurisdictions, and asymmetric relations between the center and the diverse territorial units.
Stephen L. Quackenbush
Deterrence is an important subject, and its study has spanned more than seven decades. Much research on deterrence has focused on a theoretical understanding of the subject. Particularly important is the distinction between classical deterrence theory and perfect deterrence theory. Other studies have employed empirical analyses. The empirical literature on deterrence developed at different times and took different approaches. The early empirical deterrence literature was highly limited for varying reasons. Much of the early case study literature did not seek to test deterrence theory. Early quantitative studies did seek to do so, but they were hampered by rudimentary methods, poor research design, and/or a disconnect between quantitative studies and formal theories of deterrence. Modern empirical research on deterrence has made great strides toward bridging the formal-quantitative divide in the study of deterrence and conducting theoretically driven case studies. Further, researchers have explored the effect of specific variables on deterrence, such as alliances, reputations and credibility, and nuclear weapons. Future empirical studies of deterrence should build on these modern developments. In addition, they should build on perfect deterrence theory, given its logical consistency and empirical support.
Empirical Evidence for Empirical International Relations Theorizing: Tests of Epistemological Assumptions With Data
Brian C. Rathbun
Balancing theory with evidence, in which we form and adjust our theories at least in part based on their performance, might seem to be a part of any social scientific enterprise. However, there are powerful epistemological tendencies, particularly in the field of international relations (IR), which lead many researchers in other directions. One is somewhat unique to IR—the role played historically by paradigms in the field. At their worst, paradigms put theory before evidence. They offer a set of core assumptions about the nature of international politics and lead their adherents to cherry pick evidence to support them. The other we find in many other social sciences besides political science and international relations—a commitment to deductive theorizing, particularly by practitioners of rational choice. Based on an instrumentalist epistemological position, deductive theory derives hypotheses from a set of assumptions that remain untested, and aims at uncovering general patterns of human behavior that are as generalizable as possible. This type of research, which rests on an instrumentalist epistemological approach, finds itself unable to follow the evidence because it is uninterested in testing its own assumptions with empirical data. When these assumptions prove faulty, it generates bad theory because its foundation is rotten.
International relations theorists have squabbled for decades over basic epistemological positions, with each side favoring a particular school in the philosophy of science that justifies their preferred approach to research. As Monteiro and Ruby have nicely argued in 2009, these disagreements cannot be resolved through argument, as each epistemological approach rests on its own set of assumptions that cannot be tested. While they are correct to argue that IR pick and choose their epistemology based on the kind of research they like to do, the viability of epistemological choices is to some degree subject to empirical testing.
Jeffrey Pickering and David F. Mitchell
While the empirical literature on foreign military intervention has made considerable progress identifying the causes and consequences of military intervention, we still have much to learn about the subject. Mixed and even contradictory results remain common in the literature, and cumulative knowledge has in many instances proven elusive. Arguably the two most prominent theoretical approaches in recent scholarship, the bargaining model and the rivalry approach, have provided important insight into the phenomenon. They would nonetheless benefit from further refinement. Common explanatory variables outside of these two approaches also require further theoretical and empirical development. The literature has recently begun to examine the impact that military intervention has on target societies as well, with particular attention being given to target state democratization, human rights development, and conflict resolution. Empirical research could shed additional light on all of these phenomena by developing more detailed theory and data on intervention targets. It would also profit from incorporating systematic knowledge on leaders’ proclivities to use military force into current theoretical models.
Erik A. Gartzke and Paul Poast
What explains war? The so-called bargaining approach has evolved quickly in the past two decades, opening up important new possibilities and raising fundamental challenges to previous conventional thinking about the origins of political violence. Bargaining is intended to explain the causes of conflict on many levels, from interpersonal to international. War is not the product of any of a number of variables creating opportunity or willingness, but instead is caused by whatever factors prevent competitors from negotiating the settlements that result from fighting. Conflict is thus a bargaining failure, a socially inferior outcome, but also a determined choice.
Embraced by a growing number of scholars, the bargaining perspective rapidly created a new consensus in some circles. Bargaining theory is radical in relocating at least some of the causes of conflict away from material, cultural, political, or psychological factors and replacing them with states of knowledge about these same material or ideational factors. Approaching conflict as a bargaining failure—produced by uncertainty and incentives to misrepresent, credible commitment problems, or issue indivisibility—is the “state of the art” in the study of conflict.
At the same time, bargaining theories remain largely untested in any systematic sense: theory has moved far ahead of empirics. The bargaining perspective has been favored largely because of compelling logic rather than empirical validity. Despite the bargaining analogy’s wide-ranging influence (or perhaps because of this influence), scholars have largely failed to subject the key causal mechanisms of bargaining theory to systematic empirical investigation. Further progress for bargaining theory, both among adherents and in the larger research community, depends on empirical tests of both core claims and new theoretical implications of the bargaining approach.
The limited amount of systematic empirical research on bargaining theories of conflict is by no means entirely accident or the product of lethargy on the part of the scholarly community. Tests of theories that involve intangible factors like states of belief or perception are difficult to pursue. How does one measure uncertainty? What does learning look like in the midst of a war? When is indivisibility or commitment a problem, and when can it be resolved through other measures, such as ancillary bargains? The challenge before researchers, however, is to surmount these obstacles. To the degree that progress in science is empirical, bargaining theory needs testing.
As should be clear, the dearth of empirical tests of bargaining approaches to the study of conflict leaves important questions unanswered. Is it true, for example, as bargaining theory suggests, that uncertainty leads to the possibility of war? If so, how much uncertainty is required and in what contexts? Which types of uncertainty are most pernicious (and which are perhaps relatively benign)? Under what circumstances are the effects of uncertainty greatest and where are they least critical? Empirical investigation of the bargaining model can provide essential guidance to theoretical work on conflict by identifying insights that can offer intellectual purchase and by highlighting areas of inquiry that are likely to be empirical dead ends. More broadly, the impact of bargaining theory on the study and practice of international relations rests to a substantial degree on the success of efforts to substantiate the perspective empirically.
Game theory is a set of mathematical tools used to analyze the strategic interaction between decision makers. Proponents of game theory have offered different perspectives about its potential benefits in the study of politics: It is a rigorous apparatus that can offer a solid foundation for the scientific enterprise; it offers predictions that could be tested with statistical analysis; it can account for the essence of unique cases and could be tested with qualitative evidence. Critics of game theory, in political science and international security specifically, argued in the 1990s that it had generated few empirical insights. Two decades later, game-theoretic approaches to international security remain a robust research program, but their prevalence remains limited. It is important to evaluate the potential benefits of game theory and the contributions that it has made to international security, so as to devise appropriate strategies to maximize its empirical purchase. The controlled comparison approach, using qualitative evidence on a medium number of cases, appears especially promising.
Much of the empirical international relations research implicitly equates peace with the absence of war. Moreover, causes of war are seen as sufficient for understanding peace. Such an approach turns peace into a nonevent. The stable peace literature has challenged this perspective in several ways. Firstly, peace is multilayered and additional dimensions are considered beyond violence. Secondly, it attempts to explain movements among different levels (or qualities) of peace. This study reviews the stable peace literature. It also considers alternate conceptualizations of peace. Findings from comparative case studies are considered next to those from the emerging quantitative literature that explicitly focuses on peace. Attention to internal peace and links between micro and macro levels of analysis are some of the areas highlighted as needing greater attention.