Social experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. "Significant" effects are often reported with p-values that do not account for...

This paper focuses on the entrepreneurial undertaking of immigrants and natives in Germany. We first study factors that affect the sorting of individuals into self-employment and then we investigate whether self-employment has a differential effect on the wages of individual workers and can lead...

In this paper we suggest an alternative approach to testing for the dual structure of the labour market. The novelty of the suggested approach is that rather than considering wage determination we concentrate on the turnover. To perform the test we suggest using a latent class count data...