To my brother Björn who was the best role model a little brother possibly could have had. To my mother Bera who made me see all the possibilities in life.I would like to thank; my wife Jennie for pushing me to get the work done and my children Scott and Naomi for making my life so enjoyable. Tomas for helping me with the lectures and for being such a good friend. Of course my tutor Professor Bo Ekehammar for constructive feedback in spite of lack of time. Agneta Bohlers for proof reading and checking up on my English.Last, but not least, thanks to Jan Bylov, Nordea Markets,Copenhagen and Johnny Thorsell, BörsInsikt AB, Stockholm for raising the money needed for the study….