Two anti-cocaine efforts in Colombia, funded by American taxpayers, were not cost-effective, according to an analysis by two economists. The interventions “are inefficient and socially costly ways of reducing drug consumption,” they conclude. Between 2000 and 2008, the United States spent $4.3 billion on efforts to eradicate cocaine in Colombia, The Washington Post reports. According to economists from MIT and Colombia’s Universidad de los Andes, it cost the U.S. government $940,000 to eliminate a single kilogram of cocaine from the domestic market through herbicide spraying in Colombia. Eliminating a single kilogram through interdiction efforts to block cocaine transit routes and seize shipments of cocaine cost $175,000. The report considered the tactics that coca growers and drug traffickers use to respond to enforcement efforts, such as increasing production and changing trade routes, the article notes. The findings are published in the Journal of Economic Behavior and Organization. Reducing cocaine consumption through drug...