Failed Rescue Attempt of Reinhart-Rogoff

In a Bloomberg column, Matthew Klein gives a brief discussion of errors in New Zealand GDP numbers that he claims supports Reinhart-Rogoff over their critics at the University of Massachusetts, Thomas Herndon, Michael Ash, and Robert Pollin (HAP). However the numbers he gives do not support his case.

He claims that the UMass trio relied on mistaken numbers from the Maddison Project, which is generally taken as an authoritative source on GDP. However, Klein claims that the data given for...