A new IPA study published in Science tested the effectiveness of a popular sanitation education/promotion program in Bangladesh. The program, in use in 60 countries, had no effect alone but did when combined with subsidies to build latrines.  Read more in the announcement here, the project summary here, and summary from Science here. Additional coverage from Voice of America, Ars Technica, Science 2.0, Science Codex, Medical News Today, and Medical Xpress.