Abstract
This article introduces a new dataset on post-conflict justice (PCJ) that provides an overview of if, where, and how post-conflict countries address the wrongdoings committed in association with previous armed conflict. Motivated by the literature on post-conflict peacebuilding, we study justice processes during post-conflict transitions. We examine: which countries choose to implement PCJ; where PCJ is implemented; and which measures are taken in post-conflict societies to address past abuse. Featuring justice and accountability processes, our dataset focuses solely on possible options to address wrongdoings that are implemented following and relating to a given armed conflict. These data allow scholars to address hypotheses regarding justice following war and the effect that these institutions have on transitions to peace. This new dataset includes all extrasystemic, internationalized internal, and internal armed conflicts from 1946 to 2006, with at least 25 annual battle-related deaths as coded by the UCDP/PRIO Armed Conflict Dataset. The post-conflict justice (PCJ) efforts included are: trials, truth commissions, reparations, amnesties, purges, and exiles. By building upon the UCDP/PRIO Armed Conflict Dataset, scholars interested in PCJ can include variables regarding the nature of the conflict itself to test how PCJ arrangements work in different environments in order to better address the relationships between justice, truth, and peace in the post-conflict period.
Introduction
Justice, truth, and peace in a post-conflict period are often presumed to be mutually reinforcing goals. Unfortunately, during times of insecurity, justice, truth, and peace often come into conflict. Warlords might forego peace negotiations because they fear severe punishment. Failing to punish wrongdoers could seed resentment and potentially provoke retributive violence by victims. Offering amnesty might coax rebels to surrender and thus secure a lasting peace. These examples demonstrate inherent tensions among the options used to address the violence of the past and a broader quest for truth and justice (Elster, 2010). Despite vibrant debate, we have yet to adequately address many of these relationships. With a new dataset on post-conflict justice (PCJ), 1 we can examine empirically these interactions. PCJ includes the different ways in which governments and opposition come to terms with the wrongdoings of the past, including trials, truth commissions, reparations, amnesties, purges, and exiles. More generally, with these data we can assess the relationships between justice, truth, and peace.
Recent peacebuilding literature focuses on the many institutional options available to strengthen a fragile peace (e.g. power sharing [Hartzell & Hoddie, 2007; Jarstad & Sisk, 2008], security sector reform [Toft, 2010], and peacekeeping forces [Doyle & Sambanis, 2006]), and emphasizes the types of institutions which can be put in place to increase the likelihood that conflict will not resume. We add to these institutions PCJ processes.
The focus on justice in the post-conflict period began with the trials at Nuremberg and Tokyo following World War II. In the 1970s and 1980s, many Latin American political transitions were followed by broad amnesty agreements and/or national truth commissions to address the violence of exiting military regimes (i.e. Chile and Argentina). Greater global attention was brought to transitional and post-conflict justice in 1994 when, following the end of Apartheid, South Africa implemented its Truth and Reconciliation Commission, a national effort to address historical legacies of Apartheid and the violence that occurred on both sides of the conflict (Gibson, 2004). Since 1994, a variety of judicial procedures have been initiated, including the Special Court for Sierra Leone, notable for its hybrid approach of national and international participation (Stensrud, 2009); Rwanda’s nation-wide community Gacaca court system (Clark, 2010); and Liberia’s Truth and Reconciliation Commission, which included a strong push to incorporate the voices of the Liberian diaspora community (Young & Park, 2009). From these experiences, scholars have struggled to understand the implementation, selection, and overall effects of PCJ on diverse post-conflict goals such as increasing democracy and reducing human rights abuses (Sikkink & Walling, 2007; Wiebelhaus-Brahm, 2009), seeding reconciliation (Gibson, 2004), generating catharsis and healing (Thoms, Ron & Paris, 2008), and contributing to the duration of peace (Lie, Binningsbø & Gates, 2007; Loyle & Appel, 2011; Snyder & Vinjamuri, 2004).
A major hurdle affecting analysis of these institutions and their impact on the post-conflict period is a lack of systematically collected data, both cross-national and cross-temporal. Post-conflict research has overlooked justice institutions in favor of other peacebuilding efforts; most of the work within transitional justice has focused on single institutions following political transitions, such as truth commissions (Hayner, 2011), reparations programs (De Greiff, 2006), amnesties (Mallinder, 2008), and trials (Bass, 2002; Sikkink & Walling, 2007). Olsen, Payne & Reiter (2010a,b) is a noteworthy exception. Their Transitional Justice Data Base covers trials, truth commissions, amnesties, reparations, and lustration policies in all countries in the world from 1970 to 2007. Olsen, Payne & Reiter (2010a,b) also look at transitional justice in countries with civil war. Unfortunately, their country-year data structure makes it difficult in countries with concurrent conflicts to ascertain which specific conflict the transitional justice measures target. 2
Our dataset differs from existing efforts by focusing solely on judicial institutions that are implemented following and related to a given armed conflict, allowing scholars to address hypotheses regarding post-war justice and the potential effect that these institutions have on transitions to peace. By building upon the UCDP/PRIO Armed Conflict Dataset (Gleditsch et al., 2002), our data, by design, relate directly to a prominent conflict dataset. Building on other post-conflict datasets focusing on power sharing (Hartzell & Hoddie, 2007; Walter, 2002), peacekeeping (Doyle & Sambanis, 2006; Fortna, 2004), third-party security guarantees (Walter, 2002), economic recovery (Collier, Hoeffler & Söderbom, 2008), security sector reform (Toft, 2010), and peace agreement implementation (Jarstad & Nilsson, 2008) to explain sustainable peace, our dataset adds important knowledge on justice processes in the aftermath of armed conflict. In particular, the PCJ dataset includes information on trials, truth commissions, reparations, amnesties, purges, and exiles.
Below, we describe the PCJ dataset, defining post-conflict justice, the universe of cases included, and the six distinct PCJ processes. We thereafter explore patterns of PCJ responses across different conflict characteristics such as conflict incompatibility, intensity, and type of termination. Indeed, our data can be used to address many of the main debates in the post-conflict literature, including the relationship between addressing previous wrongdoings and the likelihood of peace.
Defining and measuring post-conflict justice
In our dataset, post-conflict justice (PCJ) refers to any process initiated within five years following an armed conflict that attempts to address wrongdoings which took place as part of that conflict. The PCJ dataset is constructed to allow scholars to analyze the implementation, patterns, and effectiveness of PCJ processes (or lack of processes) on post-conflict questions such as peace duration, type of conflict, conflict outcome, regime type, and strength of democracy. 3
Our dataset covers all armed conflicts from 1946 to 2006, using the UCDP/PRIO Armed Conflict Dataset version 4-2007 (Gleditsch et al., 2002; Harbom, 2007). The UCDP/PRIO dataset was selected as the foundation for the PCJ data because of its low battle death threshold and inclusive coding criteria. The UCDP/PRIO dataset includes all armed conflicts with at least 25 annual battle-related deaths, which captures significantly lower levels of violence than other conflict data sources.
The observation unit in the UCDP/PRIO armed conflict dataset is the conflict-year. For our focus on the peace period following armed conflict, a cross-sectional data structure is more appropriate, so the PCJ dataset uses a conflict-episode structure. 4 We use the Armed Conflict Dataset’s episode start and end date variables to define when conflict occurs and when the post-conflict peace period begins. We include PCJ processes that were implemented in the first five years of this post-conflict peace period. 5 A five-year window is the convention in the post-conflict literature (e.g. Flores & Nooruddin, 2009; Walter, 2002). This coding rule ensures that a given PCJ process truly occurs in the aftermath of war and therefore has the potential to influence the likelihood of conflict reoccurrence. 6
The PCJ dataset includes 357 armed conflict episodes from 1946 to 2006. 7 A total of 272 post-conflict justice processes relate to 173 different conflict episodes. Fifty-three percent of post-conflict societies implement at least one PCJ tool; 22% have two or more processes. These processes can be implemented either internationally or domestically, but they all represent efforts by the post-conflict government and/or the international community to address wrongdoings related specifically to the conflict episode in question. 8
Our primary sources of information for coding post-conflict justice processes were Keesing’s World News Archive, the United States Library of Congress Country Studies, Minorities at Risk Assessments and Chronologies, and the online database of the Uppsala Conflict Data Program (UCDP). When needed, we accessed the full text of peace agreements and truth commission reports available at the United States Institute of Peace webpage and the online UCDP database. When none of these sources provided adequate information, we consulted others on a case-by-case basis. 9
Types of post-conflict justice processes
The PCJ dataset includes information on six forms of addressing wrongdoing: trials, truth commissions, Percentages of trials with various characteristics
Trials
The most commonly employed PCJ process in our dataset is putting wrongdoers on trial. A trial is the examination of alleged wrongdoing through judicial proceedings within a legal structure. Trials can include domestic prosecutions, international tribunals such as the International Criminal Tribunal for the former Yugoslavia, or hybrid courts such as the Special Court for Sierra Leone. The PCJ dataset records the presence or absence of trials in the post-conflict period as well as trial-specific data regarding whether: the process was domestic or international; the defendant was tried in absentia; anyone was executed as a consequence of the trial process; the trial involved breaches of justice. Figure 1 shows the percentages of the 78 trial processes with these characteristics. 11
Domestic trials are by far the most common way of dealing with past wrongdoings. Only 6 of the 78 trials in our dataset involve an international tribunal; the majority of these relate to the armed conflicts in former Yugoslavia. Twelve of the trial cases include defendants who were tried in absentia. For example, on 2 December 1986 former president Ali Nasir Muhammad of South Yemen was sentenced to death in absentia for his involvement in the civil war, but he had already fled to North Yemen. Close to half (45%) of all post-conflict trials involve executions. Twelve of the trial processes exhibit a breach of justice, in which weak legal standards are Percentages of truth commissions with various characteristics 
Truth commissions
To gather information about past wrongdoings, truth commissions are sometimes established to investigate and hold violators accountable. Truth commissions are officially-sanctioned, temporary investigative bodies that focus on a pattern of abuse over a particular period of time (Hayner, 2011: 11). A commission can be both a mechanism for a country to address past wrongdoings that occurred during a conflict and a way for individuals and communities to learn what happened to relatives and friends. The number of truth commissions is growing, but most are designed to deal with broad legacies of abuse and violence. The PCJ dataset includes only truth commissions that were implemented to address the specific violence of a given armed conflict and those which were implemented in the 5 years immediately following the conflict. 12 We also recorded whether the truth commission was domestic or international and whether or not there was a suspected breach of justice (e.g. the absence of a final report).
Our dataset records nine truth commissions; two are international (see Figure 2 for an overview). All truth commissions are mandated to investigate wrongdoings committed by all parties to the conflict, but two Percentages of reparations with various characteristics
Reparations
Reparations are compensation given by the state to an individual or group who was harmed in some way during the conflict. The majority of post-conflict reparations target all parties to a conflict. Examples include the granting of pensions to widows of those killed in the 3 August 1979 coup d’état in Equatorial Guinea and peace agreements emphasizing the right to return to land – or if that is impossible, fair compensation – to refugees and internally displaced persons. The PCJ dataset records which post-conflict societies called for reparations and provides information on the type of reparation: property, money, and general community compensation. The majority provided property (10 cases) or money (14 cases); only two programs provided public goods to the community. Figure 3 shows the share of the 20 reparation cases with these three types of reparations.
Amnesties
Granting wrongdoers amnesty or immunity is common in post-conflict societies. Amnesty is a promise (or in some cases formal legislation) on the part of the ruling party to not prosecute or punish past violators. When there have been grave violations of human rights, it seems reasonable to believe that some sort of accountability process is necessary; however, in negotiating peace settlements, leaders might choose to forgo traditional conceptions of justice to secure an end to the violence. Amnesty legislation can extend to former heads of state, government officials, members of the military or active participants in the armed violence.

Percentages of amnesties with various characteristics
The PCJ dataset contains 92 cases of amnesty. In addition to a dichotomous variable recording whether an armed conflict was followed with amnesty or not, the data include variables reporting if amnesties were limited, conditional, or unconditional. Figure 4 shows shares of the post-conflict amnesties in our data with these characteristics. Most amnesties are granted unconditionally, particularly general amnesties granted as parts of peace agreements. For example, in Papua New Guinea, the 1998 agreement formally ending the Bougainville conflict states that the government shall ‘grant amnesty to persons involved in crisis-related activities on all sides’ (Lincoln Agreement, 1998: Article 10). Other amnesties are limited to certain crimes or persons, such as the 2003 amnesty to Mujahideen e Khalq members in Iran that did not include the group’s leaders. Post-conflict amnesties are frequently granted conditional on rebels giving up the armed fight. Our data also reveal that in most cases amnesty is extended to the losing party, giving strength to the hypothesis that granting amnesty is a way to bargain for peace.
Purges
The victorious party in a conflict often will try to exclude sympathizers of the defeated party from positions of influence. This process is known as purging: the act of removing politicians, armed forces members, judiciary or other members of society for their (alleged) collaboration with or participation in a conflict and limiting their influence accordingly. 13 Only 15 post-conflict episodes in our dataset are followed by purges. Almost all of these purges are directed towards the loser of the conflict, although Russian President Yeltsin in 1996 purged hardliners, including strong promoters of the Chechnyan war, from within his own ranks.

Percentages of purges with various characteristics
Our data record the presence or absence of purges in the post-conflict period, whether the purges occurred in the military, the judiciary or the civil service. Figure 5 shows that most purges take place in the armed forces, often following military coups. After a coup, the victorious party requires the support of the army and therefore attempts to eliminate potential threats from the military. In a few cases, a purge has been undertaken in the judiciary. In China, after the communists won over the Chiang Kai-shek government in 1949, the new government launched a judicial reform in which judges sympathetic to the former regime were expelled from the courts. Of the 15 purges in our data, six include civil servants (for example, the purge of Allende supporters and communists from the universities in Chile when Pinochet came to power in 1973).
Exiles
Exiles provide an opportunity for a new government to reduce the influence of past wrongdoers by removing them from the country. Exile is a period of forced or voluntary absence from one’s home country. Exile agreements can be de facto or de jure, often allowing a past wrongdoer the opportunity to live out the remainder of his or her life undisturbed, but outside of the home country. An exile can also be willing when an individual chooses to leave the country because of conflict-related events. 14
Reasons for exile differ. Sometimes the victorious party expels its opponents (i.e. the exile is a punishment following a trial); at other times, wrongdoers or their supporters are in exile because they fled the country when defeat was imminent. Former Nicaraguan President Somoza fled after the 1978–79 armed conflict; after the 1964 coup, the former president of Gabon, Jean-Hilaire Aubame, was sentenced to hard labor and ten years of exile. We record whether exile processes are willing or forced (see Figure 6).

Percentages of exiles with various characteristics
PCJ descriptive variables
In addition to the presence or absence of the six types of PCJ and process-specific variables, the PCJ dataset records descriptive characteristics for all PCJ processes: start date, target, sender, and scope of the process. The start date records the first evidence of a PCJ process in our sources (such as the start of a trial or the agreement to convene a truth commission). The target is the individual or group addressed by the process (e.g. the rebel leader who is exiled or the former president who is put on trial). The target variable distinguishes between side A, side B, and both. The sender is the individual, group or government who initiates the process. 15 A process is usually initiated by the group in power after the conflict, but following a peace agreement both groups may agree to a certain PCJ process. The sender variable also distinguishes between side A, side B, and both, in addition to international sender and ‘other’ if the sender is unclear. Finally the scope refers to the level of inclusivity of the targeting of the process, such as whether an amnesty extends only to rebel leaders or to the whole organization.
Details and dynamics of post-conflict justice
PCJ processes are not equally distributed across all types of armed conflicts. In this section we provide some preliminary descriptions of variations in PCJ initiation across conflict incompatibility, conflict intensity, and type of conflict termination.

Number of post-conflict justice processes by conflict incompatibility
Post-conflict justice by conflict incompatibility
We assume that the conflict itself affects the decision to implement a PCJ and the type of process selected. But under what conditions does a country choose an accountability process such as trials or truth commissions over a political concession such as amnesties or exiles? And what influence does the type of conflict have on potential choices? These questions have yet to be empirically tested, but we use the PCJ dataset to preliminarily explore variation in post-conflict justice across conflict-related characteristics such as conflict incompatibility and termination type.
Using the UCDP coding for incompatibility, we divide our dataset’s conflict episodes into those fought over territorial disputes and those fought for government control. Figure 7 shows the number of PCJ processes implemented after these two types of conflict.
Although the numbers of territorial and government conflicts are approximately the same (158 and 168, respectively), the use of PCJ processes differs. Conflicts over government control are more likely to lead to PCJ than territorial conflicts and the relationship between trial and amnesty processes differs between the two types of conflict.
Post-conflict justice by conflict intensity
The UCDP/PRIO Armed Conflict Dataset encompasses conflicts with different levels of violence and intensity, including such diverse conflicts as the 1946–49 Chinese Civil War, in which more than one million people were killed, and the Maoist Communist Party’s fight with the Turkish government in 2005 that caused 25 deaths. We know that severe civil wars are more likely to bring combatants to negotiations than less intense conflicts (Walter, 2002), but we did not know if and how conflict intensity influences post-conflict decisions in terms of justice outcomes. Figure 8 gives a first view of differences in PCJ processes for civil wars and low-intensity armed conflicts. 16
Of the PCJ dataset’s 326 peace periods, 195 follow low-intensity conflicts (fewer than 1,000 battle-related deaths in total) while 131 emerge after civil wars causing at least 1,000 battle deaths. Only 17% (22 of 131) of all civil wars result in trial processes, compared with almost one-third (56 of 195) of the low-intensity conflicts. 17 Civil wars also lead to more amnesties than less severe conflicts. These patterns seem to indicate that those in power after civil wars often forgo accountability processes to secure conflict termination.
Post-conflict justice by type of termination
How a conflict ends also influences the type of PCJ process that is selected. Scholars have suggested that the political power structure following a conflict can be one of the largest determinants of justice implementation (Nalepa, 2010). For example, a decisive victory by one side of the conflict may ensure that PCJ is implemented, but targeted at the losing side. Alternatively, a conflict which ends in a political stalemate or negotiated settlement may forgo punishment by implementing an amnesty in the hope of preserving peace.

Number of post-conflict justice processes by conflict intensity

Number of post-conflict justice processes by conflict termination
In Figure 9 we use variables from the UCDP Conflict Termination dataset version 2.0 (Kreutz, 2010) to explore which types of termination will most likely end in a PCJ process. 18 Of the 326 terminated armed conflicts in this dataset, 109 ended by military victories, 76 by bargained solutions, and 141 by other means.
Trial processes more often take place after conflicts that end in decisive victories (47% of all victory cases contain a trial process). Victories also provide an opportunity to implement purging (10%) and are followed by high levels of exile (42 of 109). High levels of amnesty after victories could be the result of the new leadership wanting to maintain the economic and political support of the old opposition, although amnesties are even more common after bargained solutions to armed conflict (45% of all bargained solutions include amnesty provisions). These statistics provide first-cut evidence that bargaining elites are willing to make concessions for settlement, as truth commissions, reparations, and amnesties occur more frequently than after other types of conflict termination. Exiles are rare when settlements are reached by bargaining, probably because those who would leave, willingly or forced, have agreed to the terms of the settlement. Conflicts that are not clearly resolved generally see few PCJ processes.
Conclusion
The PCJ dataset contributes to the growing literature on post-conflict institutions and transitional justice by providing a broader understanding of post-conflict justice and the variation in PCJ processes across different conflict characteristics and contexts. Since the PCJ dataset can be used in conjunction with the UCDP/PRIO Armed Conflict Dataset, conflict variables can be employed with ease to answer questions about the relationships between justice, truth, and peace. Preliminary analyses suggest that conflict incompatibility, intensity, and termination type influence PCJ options. Conflict, peacebuilding, and transitional justice scholars can use the PCJ dataset to better understand the effect that post-conflict justice has on transitions to peace. The dataset also offers important insights into the conditions and environments that make different PCJ responses more effective.
Footnotes
Replication data
The post-conflict justice dataset, codebook, and background narratives can be found at http://www.prio.no/jpr/datasets. These files are also available at
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Acknowledgements
The authors are grateful to Gillian Beach, Marianne Dahl, Lindsay Jouben, Tove Grete Lie, Britta Nelson, Håvard Mokleiv Nygård, and Eivind Berg Weibust for valuable research assistance. In addition we are grateful for helpful comments along the way, from colleagues at the Centre for the Study of Civil War at PRIO and the Norwegian University of Science and Technology, participants at the ‘Transitional Justice in the Settlement of Conflicts and Kidnapping’ workshop in Bogotá, Colombia, 18–19 October 2005, and the CICDM workshop on peace and conflict, University of Maryland, 2 May 2007.
Funding
This research was supported by the Research Council of Norway, which has provided support for the Centre for the Study of Civil War at PRIO since 2002.
Notes
References
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