Employees learn from performing their tasks, and in the process they accumulate potentially portable human capital. If companies cannot commit to specific task assignments, they may have an incentive to assign workers to tasks that reduce the cost of retaining them but do not maximize their...

The last decades have shown that the traditional steady job with a permanent contract is on the decline. While permanent contracts and the insider position that they bring are highly valued by workers, research on the returns to human capital have predominantly focused on wages as subject of...