Ricardo A. M. R. Reis (born September 1, 1978) is a Portuguese economist. He is currently a professor of economics at Columbia University in New York City. He became a full professor at the age of 29, one of the youngest ever in the history of the University. Reis is a Research Associate of the NBER, a Research Affiliate of the CEPR, and is a co-editor of the Journal of Monetary Economics and sits on the Board of Editors of the American Economic Review and the Journal of Economic Literature.
Reis earned his Bachelor of Science (B.Sc.) degree from the London School of Economics in 1999, and his Doctor of Philosophy (Ph.D.) from Harvard University in 2004. In 2009, Reis was ranked the second most cited young economist in the world.
His main area of research is macroeconomics. His past work has focussed on models of inattention, measures of inflation, and several contributions to the study of monetary and fiscal policy. His best known work is on the theories of rational inattention and sticky information, according to which information disseminates slowly throughout the population leading to sluggishness in macroeconomic aggregates, endogenous disagreement, and a Phillips curve trade-off between inflation and real activity. He has also made many contributions to the study of the properties of inflation, including its unchanged persistence, measures of pure inflation, and dynamic price indices. His last work shows that across the world there was very little increase in government purchases, with most fiscal stimulus programs going to fund increases in social transfers.