http://www.latimes.com/local/lanow/l...426-story.htmlResearchers theorized that the turnaround may be linked to several factors, including the more polarized national dialogue on race sparked by police shootings in Ferguson, Mo., and elsewhere, as well as by the tenor of last year’s presidential election. Moreover, many parts of L.A. still suffer from some of the economic problems and lack of opportunities that fueled anger before the riots.