Demining campaigns are key to remove anti-personnel landmines, one of the main causes of civilian victimization in conflict-affected areas and a significant obstacle for post-war reconstruction and long-term development. We argue that the documented positive economic effects of mines' clearance campaigns is likely not the case if demining operations take place while conflicts are ongoing or if they are only partial. Using highly disaggregated data on demining operations in Colombia from 2004 to 2019 and exploiting the staggered fashion of demining, we find that only post-conflict humanitarian demining generates economic growth (measured with nighttime light density) and increases students' performance in test scores. In contrast, economic activity does not react to post-conflict demining events carried out during military operations, and it decreases if demining takes place while the conflict is ongoing. Rather, those types of demining are more likely to exacerbate extractive activities that do not manifest in higher economic growth but increase deforestation instead.

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Violence in conflict settings is seldom random, making its effects indistinguishable from the intentions of the perpetrator. We leverage on the quasi-randomness of accidental landmine explosions to study how violence shapes electoral outcomes in Colombia. We combine the geolocation of landmine blasts with the coordinates of voting polls in a regression discontinuity design that compares polls close to which a landmine exploded just before the election to those close to which it did just afterward. Blasts within a month from election day depress turnout by 23%. In addition, those who do vote penalize the democratic left for the explosions and are more likely to support political parties with ties with illegal paramilitary groups.

The victimization of civilians and combatants during internal conflicts causes large and persistent socioeconomic costs. Moreover, it is not clear whether peace negotiations can significantly reduce this burden, as some sources of harm persist well after conflicts end. This is the case of antipersonnel landmines, which are hidden underground and remain active for decades. Looking at the recent experience of Colombia, and using a difference-in-differences empirical strategy, we study the conditions under which peace agreements reduce landmine blasts and victimization. Our findings point to the importance of post-conflict information sharing and comprehensive humanitarian mine clearance campaigns.

Anti-personnel landmines are one of the main causes of civilian victimization in conflict-affected areas and a significant obstacle for post-war reconstruction. Demining campaigns are therefore a promising policy instrument to promote long-term development. We argue that the economic and social effects of demining are not unambiguously positive. Demining may have unintended negative consequences if it takes place while conflicts are ongoing, or if they do not lead to full clearance. Using highly disaggregated data on demining operations in Colombia from 2004 to 2019, and exploiting the staggered fashion of demining activity, we find that post-conflict humanitarian demining generates economic growth (measured with nighttime light density) and increases students' performance in test scores. In contrast, economic activity does not react to post-conflict demining events carried out during military operations, and it decreases if demining takes place while the conflict is ongoing. Rather, demining events that result from military operations are more likely to exacerbate extractive activities.