The statistical analysis of cross-section data very often reveals a U-shaped relationship between subjective well-being and age. This paper uses fourteen waves of British panel data to distinguish between two potential explanations of this shape: a pure life-cycle or aging effect, and a fixed...

This paper reviews studies conducted in naturally-occurring work environments or in the laboratory on the impact of performance feedback provision and peer effects on individuals' performance. First, it discusses to which extent feedback on absolute performance affects individuals' effort for...