Ariela Alpert, Sarah Craig, and Lucia Sanchez, of IPA's Small and Medium Enterprise (SME) Initiative, have an article in The Broker, explaining a conundrum in the field - while training seems to help small businesses in the developing world grow, the research shows classroom management training consistently disappointing in effectiveness. They review what's known to date in the article here, and more on the initiative's work to find out how to grow small and medium-sized enterprises in the developing work is on their page, here.