A 2012 article by the same authors and Daniel Sacks returns to this time series criticism with new data, though at times the article asserts that the paradox is a contradiction between two types of cross-section evidence — data for persons and for countries. Outside of economics, two founding fathers in the study of self-reported happiness, Ed Diener in psychology, and Ruut Veenhoven in sociology, have each, with their collaborators, also presented evidence of a significantly positive time series relationship.
A 2012 article by the same authors and Daniel Sacks revisits the criticism of this time series analysis with fresh data, although it sometimes implies that the paradox stems from a discrepancy between two types of cross-sectional evidence — data for people and countries. Meanwhile, outside of economics, Ed Diener in psychology and Ruut Veenhoven in sociology, both well-known researchers in the study of self-reported happiness, have also presented substantial evidence of a positive time series relationship with their collaborators.