After obtaining his PhD in 1996 with a book on the 19th century Amsterdam market, Joost Jonker (*1955) worked as a consultant-researcher with Stratagem Strategic Research and RAND Europe, mostly on aviation-related matters. Having moved to Utrecht University, he widened his research interests to embrace business and financial history from the 16th century to the present. Since 2012 he occupies the NEHA Chair in Business History at the University of Amsterdam (http://www.uva.nl/profiel/j/o/j.p.b.jonker/j.p.b.jonker.html), which he combines with a position as Senior Researcher at the International Institute of Social History in Amsterdam. Jonker wrote or co-wrote books on Dutch international trading companies, a company history of Royal Dutch Shell, and numerous articles on business and financial history.