I find such claims annoying. Since non of us are privy to how these decisions are made. Unless one of the posters here is Mancini, Cook or Marwood, or their playtoy (which I doubt). All we can claim is any player bought under the regime of a certain coach, is that coach's buy. Unless that is, there is tangible evidence to the contrary.
Hughes: Boateng, Lescott, De Jong, Tevez, RSC, Bayor, Bellamy, Kolo, Robihno, Barry and Bridge. There is some evidence suggesting Robihno was not totally a Hughes purchase, but he wasn't against it. He supported bring ing in a superstar to signal City was ready for the bigtime. So it is his buy.
Mancini: Viera, AJ, Silva, Yaya, Milner, Boateng, Balotelli, Kolarov and Dzeko.