In this project, we examine the importance of individual and employer-specific determinants in escaping low earnings in Germany. The overall objective is to identify a possible segmentation of the labour market into work places with low and high prospects of earnings mobility. In order to quantify the extent to which segmentation proceeds along individual and/or employer characteristics, we use the Linked-Employer-Employee Data set of the IAB, a data set that supplies both information on workers as well as their employers.