(Reuters) – Former New York Mayor Michael Bloomberg will return as head of Bloomberg LP, the data and financial news company he founded in 1981, replacing Daniel Doctoroff who has decided to step aside, the company said on Wednesday. The privately held company, in which Bloomberg is the majority shareholder, said Doctoroff would step aside as president and chief executive at year-end. Bloomberg, whose fortune is estimated at more than $32 billion, had expected to […]