The cumulative rate hikes of 2.5 percentage points by the central bank since May 2022 negatively impacted headline inflation by 1.60 per cent, a paper by senior RBI staffers said on Monday."Policy rate increases have anchored inflation expectations and modulated aggregate demand, generating disinflationary responses," the paper by Deputy Governor Michael Patra, Indranil Bhattacharyya, Joice John and Avnish Kumar, said.