WELLINGTON, Jan 27 (Reuters) - New Zealand's business confidence improved in January as the shock of the November Monetary Policy statement wore off, an ANZ Bank survey said on Friday.

The survey's headline measure showed a net 52% of respondents expected the economy to deteriorate over the year ahead, versus a 70.2% pessimism level in the previous poll in December.

A net 15.8% of respondents expected their own businesses to shrink in the next 12 months, versus a contraction of 25.5% last month. (Reporting by Lucy Craymer; Editing by Christian Schmollinger)