, and depends on three factors: longevity genes, health investment and farsightedness. Provided earnings, farsightedness and … conclusions depend also on how productivity and genes are correlated, on the complementarity of genes and efforts in the survival …

We present a field experiment in which we set up a call-center to study how the productivity of workers is affected if … such confounds and to measure productivity changes of unaffected workers in a clean way, we create an environment where … different control treatments, we find that, in the layoff treatment, the productivity of the remaining, unaffected workers drops …

mechanism can help explain empirical findings of a negative effect of competition on quality in markets such as health care …

on health care quality, health care financing and welfare. We show that without patient mobility quality is too low (high …