Katri Karjalainen successfully defends PhD thesis

On 22 May 2009, Katri Karjalainen successfully defended her PhD thesis, titled “Challenges of purchasing centralization: empirical evidence from public procurement”, at Helsinki School of Economics. Opponent for the defense was Prof. dr. Björn Axelsson from Stockholm School of Economics, and the thesis was supervised by Dr. Katariina Kemppainen from Helsinki School of Economics and Dr. Erik van Raaij from Rotterdam School of Management, Erasmus University.