This paper addresses the puzzle how employers that invest in general human capital can gain an information advantage with respect to the ability of their employees when training is certified by credible external institutions. We apply an established model from the employer-learning literature...

This study aims at disentangling the returns to formal, non-formal and informal training and fills key knowledge gaps. Informal learning is found to be by far the most common form of job-related learning at work. Learning informally at work is found to be associated with 3.5% higher wages, on...

We develop a product market theory that explains why firms provide their workers with skills that are sufficiently general to be potentially useful for competitors. We consider a model where firms first decide whether to invest in industry-specific human capital, then make wage offers for each...