German publishing group Axel Springer has bought up 15 percent of Oslo-based jobs site StepStone and plans to take its stake up to 33 percent. Springer’s prepared to pay up to 7 NOK (£0.67) per share – a nice premium on Tuesday’s 3.50 NOK (£0.33) close. Founded in 1996, StepStone floated on Oslo’s market at the apex of the dot.com boom in 2000 and promptly liquidated its UK operation a year later. It’s now entered the “human capital management” area, has offices around the world and claimed