Hypothesis
Longer commutes would be associated with lower subjective well-being, as earlier studies had reported.
What failed
Using a range of fixed-effects ordered estimators, the authors found no general evidence that longer commutes go with lower well-being, unlike earlier papers.
Broken assumption
Commuting longer reliably lowers people's life satisfaction.
Why
The abstract attributes nothing specific; it is mainly a comparison of estimators, and reports that linear and ordered fixed-effects models agree.
From the published paper: Dickerson et al. Regional Science and Urban Economics, 2014. ↗CC BY