@TECHREPORT {SFB649DP2012-013,
  AUTHOR={Senftleben, Charlotte and Wielandt, Hanna},
  TITLE={{The Polarization of Employment in German Local Labor Markets}},
  YEAR=2012,
  INSTITUTION={Sonderforschungsbereich 649, Humboldt Universit\"{a}t zu Berlin, Germany},
  TYPE={SFB 649 Discussion Paper},
  NOTE={available at http://sfb649.wiwi.hu-berlin.de/papers/pdf/SFB649DP2012-013.pdf},
  NUMBER={2012-013}
}