The Pentagon's advanced research arm will hold a proposers' day this week for a program that seeks to help decision makers better understand complex social behaviors by developing testbeds for social science modeling methods. According to an April 7 notice on the Federal Business Opportunities website, the Defense Advanced Research Projects Agency intends to hold a webcast proposers' day on April 20 for the Ground Truth program. "To improve knowledge of social science modeling's capabilities and limitations, DARPA is announcing...