Roger Aliaga-Díaz, Ph.D., is chief economist, Americas, and a principal in Vanguard Investment Strategy Group. His areas of expertise are monetary policy, international macroeconomics, and finance.

Mr. Aliaga-Díaz has published studies on investment and macroeconomic issues in peer-reviewed academic journals and has presented his research at various industry and academic conferences including the Board of Governors of the Federal Reserve System and the American Economic Association.