Most studies find little to no effect of classroom computers on student achievement. We suggest that this null effect may combine positive effects of computer uses without equivalently effective alternative traditional teaching practices and negative effects of uses that substitute more...

In 2005, the Indian Government launched a conditional cash-incentive program to en- courage institutional delivery. This paper studies the eects of the program on neonatal mortality using district-level household survey data. We model mortality using survival analysis, paying special attention...

Cooperating behavior may be fostered by personality traits re ecting either favorable inclination to others or willingness to comply with norms and rules. We test the relative importance of these two factors in an experiment where subjects provide real mental effort in two treatments with...

An ‘efficiency wage’ model developed for Western economies is reinterpreted in the context of Stalin’s Russia, with imprisonment – not unemployment – acting as a ‘worker discipline device’. The threat of imprisonment allows the state to pay a lower wage outside the Gulag than...

This paper studies the interaction of incentive pay and social distance in the dissemination of information.We analyse theoretically as well as empirically the effect of incentive pay when agents have pro-social objectives,but also preferences over dealing with one social group relative to...

We investigate whether and how the type of unemployment benefit institution affects productivity. We designed a field experiment to compare workers' productivity under a welfare system, where the unemployed receive an unconditional monetary transfer, with their productivity under a workfare...

We use HISCLASS to code the occupational titles of over 30,000 English male workers according to the skill-content of their work. We then track the evolution of the sampled working skills across three centuries of English history, from 1550 to 1850. We observe a modest rise in the share of...