Michael Jansson is Professor of Economics at University of California, Berkeley, and has held visiting positions at Harvard University and MIT. He obtained the PhD degree in economics from Aarhus University in 2000. Professor Jansson is a theoretical time series econometrician with particular focus on the optimality in estimation and testing in econometrics. He has published his works in top journals like Econometrica, Journal of Business and Economic Statistics, Econometric Theory, and Journal of Econometrics. He acts as associate editor of Econometric Theory.