The Effect of Natural Resource Shocks on Violence, Crime, and Drug Cartels Presence in Mexico

Abstract: We examine the effect of natural resource shocks on violence by drug cartels at the municipality level in rural Mexico from 2003 to 2017. For this, we use an Instrumental Variable setup by instrumenting our main explanatory variable vegetation density with rainfall. Vegetation density is an indicator for natural resource shocks and reflects the “greenness" in a particular area which is considered as an indicator of land productivity. Our main finding is that negative shocks in vegetation density increase homicides. This negative shock could imply crop failures resulting in bad economic outcomes for people in rural areas thereby pushing people to engage with violent drug cartels. Additionally, in order to confirm the main results we explore possible effects that natural resource shocks have on drug cartel presence, seizure of illegal drugs and other drug-related criminal activities. These results further confirm the negative relationship between natural resource shocks and violence by drug cartels. Our findings highlight the dynamics in the operation of the drug cartels and are relevant for understanding the determinants of conflict in rural Mexico.