To secure their membership in a popular group, individuals may contribute more to the group’s local public good than they would if group formation were exogenous. Those in the most unpopular group do not have this incentive to contribute to their group. Substantial differences in individual...

Many empirical studies find a partial negative effect of market integration on cooperation in traditional poor small-scale farmer communities in developing countries, blaming an erosion of collective action enhancing norms (Social Capital). This paper takes the empirical analysis one step...

This paper studies the aggregate distribution of declared opinions and behavior when heterogeneous individuals make the trade-off between being true to their private opinions and conforming to an endogenous social norm. The model sheds light on how various punishment regimes induce conformity or...

Morally motivated individuals behave more cooperatively than predicted by standard theory. Hence,if a firm can attract workers who are strongly motivated by ethical concerns, moral hazard problems like shirking can be reduced. We show that employers may be able to use the firm’s corporate...

Farm couples' labour market responses are partly the qualitative choice of entering the ff-farm labour market and partly the continuous choice of the number of on-farm and off-farm working hours, given entry. Such a setting is interesting when examining the increasing occurrence of multiple...

A structural dynamic programming model is applied for modeling labour market transitions among older age workers in Norway in 1992-2003. Special attention is given to early retirement pensiion and disability pension as two major exit routes from the labour force. Health status is represented by...

This paper assesses the causal effect of sick-leaves on subsequent earnings using an administrative dataset for Norway linking individual earnings, sick-leave records and primary care physicians. The leniency of a worker's physician - certifying sickness absence - is used as instrument for...

Unreported labour by one worker in a firm increases the probability of detection for his fellow workers, not only for himself. The firm takes this external effect into account. As a consequence, unreported work becomes rationed by the firms demand, rather than determined by demand equal supply....

A crucial issue in efficiency-equality evaluations of tax reforms resides in the possibility that the level as well as the distribution of welfare may change, where the household-specific measures of welfare capture the value of income as well as the value of leisure. A better-designed...

In this paper we discuss a general framework for analyzing labor supply behavior in the presence of complicated budget- and quantity constraints of which some are unobserved. The individual’s labor supply decision is viewed as a choice from a set of discrete alternatives (jobs). These jobs are...