A record number of homicides in Mexico has forced President Felipe Calderon to open discussions on a new strategy in the war on drugs: legalization. The impact of violence is the biggest threat to the Mexican economy according to 57 percent of Mexican executives, a survey published last month by Deloitte Touche Tohmatsu showed. Mexico, which spends about $8.2 billion annually on law enforcement, would save between 5 percent and 15 percent of GDP if narcotics were legal in all countries, said Luis Rayo, a finance professor at the University of Utah.