Prof. Dr. Bert M. Balk held a chair in business administration, in particular the measurement of price, quantity, and productvity changes and economic-statististical research, at Rotterdam School of Management, from 2001 to 2011. This chair was supported by Statistics Netherlands, where Prof. Balk worked in various positions from 1973 to 2011. A.o. he was deputy head of the Department for Price Statistics and director of the Center for Research of Enterprise Microdata (Cerem). His research interests include measurement in economics, in particular index number theory and productivity measurement. He has published a large number of articles in academic journals, has written two books, and has served on the editorial boards of the Journal of Productivity Analysis and Statistica Neerlandica.