Former Google Director of Strategic Technologies Preston McAfee made the jump to Microsoft to become the software giant's chief economist. McAfee's new duties include leading a team of economists to develop "new business models and metrics" and "marketplaces for advertising and apps," according to a blog post by Harry Shum, Microsoft executive vice president of technology and research. It's all part of a plan by Microsoft to focus on user data generated in day-to-day computing for continual learning and improvement. McAfee will also help develop government relations, policy and Microsoft economic strategy. Before joining Google in 2012, McAfee served as Yahoo chief economist for five years, obtained several patents, spent five years as a professor at California Institute of Technology and published two economics textbooks.