Michael E. Porter and Jan W. Rivkin discuss the findings of Harvard Business School’s 2013–14 Alumni Survey on U.S. Competitiveness. Their report, "An Economy Doing Half Its Job," focuses on a troubling divergence in the American economy: large and midsize firms have rallied strongly from the Great Recession, and highly skilled individuals are prospering, while middle- and working-class citizens are struggling, as are small businesses.