While international trade in goods and services has long been expanding, the speed and scope of recent changes have given rise to the term ¿globalization.¿ Among the most pressing policy questions in the United States and other advanced economies are those concerning the impact of globalization: Has globalization fostered productivity growth and well-being in advanced economies? Or have the forces of globalization weakened key national industries, resulted in widespread worker dislocation and wage stagnation, and worsened inequality? Understanding the impacts of globalization is critical to fashioning appropriate policies in a rapidly changing world. But understanding its impacts requires good data, and national statistical systems were not designed to measure many of the transactions occurring in today¿s global economy. The chapters in this volume and its companion, Measuring Global­ization: Biases to Price, Output, and Productivity Statistics from Trade, identify biases and gaps in national statistics, examine the magnitude of the problems they pose, and propose solutions to address significant biases and fill key data gaps. The chapters originally were presented as papers at a research conference in 2013 funded by the Alfred P. Sloan Foundation, and their authors include researchers from academic insti­tutions and statistics agencies in the United States and other countries.