@article{UBHD-68192326,
  author={Gathmann, Christina and Keller, Nicolas},
  title={Access to citizenship and the economic assimilation of immigrants},
  year={2017},
  pages={1-48},
  language={eng},
  issn={1468-0297},
  note={Gesehen am 20.11.2017},
  journal={The economic journal},
  doi={10.1111/ecoj.12546},
}
@book{UBHD-69047689,
  author={Gathmann, Christina and Keller, Nicolas},
  title={Returns to citizenship?},
  subtitle={Evidence from Germany's recent immigration reforms},
  publisher={Univ., Center for Economic Studies},
  address={Munich},
  year={2014},
  pages={34 S. + Anh.},
  language={eng},
  number={ARRAY(0x563b4315a538)},
  series={CESifo working papers},
  note={Literaturverz. S..30 - 34},
}
@book{UBHD-69047687,
  author={Gathmann, Christina and Keller, Nicolas},
  title={Returns to citizenship?},
  subtitle={evidence from Germany's recent immigration reforms},
  publisher={DIW},
  address={Berlin},
  year={2014},
  pages={Online-Ressource (32, [22] S.)},
  language={eng},
  number={ARRAY(0x563b43284a08)},
  series={SOEP papers on multidisciplinary panel data research / German Socio-Economic Panel Study (SOEP), DIW Berlin},
}
@book{UBHD-67775280,
  author={Gathmann, Christina and Keller, Nicolas},
  title={Returns to citizenship?},
  subtitle={Evidence from Germany's recent immigration reforms},
  publisher={IZA},
  address={Bonn},
  year={2014},
  pages={Online-Ressource (34, [23] S.)},
  language={eng},
  number={ARRAY(0x563b432af988)},
  series={Discussion paper series / IZA},
  note={Gesehen am 18.02.2015},
}
@book{UBHD-69047685,
  author={Gathmann, Christina and Keller, Nicolas},
  title={Returns to citizenship?},
  subtitle={Evidence from Germany's recent immigration reforms},
  publisher={CESifo},
  address={M{\"u}nchen},
  year={2014},
  pages={Online-Ressource (38, [22] S.)},
  language={eng},
  number={ARRAY(0x563b43297768)},
  series={CESifo working papers},
}
@article{UBHD-69047684,
  author={Gathmann, Christina and Keller, Nicolas and Monscheuer, Ole},
  title={Zuwanderung als Chance f{\"u}r Deutschland},
  year={2014},
  pages={159-164},
  language={ger},
  issn={1613-978X},
  volume={94},
  number={3},
  journal={Wirtschaftsdienst},
  doi={10.1007/s10273-014-1652-3},
}
@book{UBHD-68047188,
  author={Keller, Nicolas},
  title={Essays on immigration policies},
  address={Heidelberg},
  year={2016},
  pages={vi, 172 Seiten},
  language={eng},
  school={Dissertation,  Universit{\"a}t Heidelberg,  2016},
  keywords={Einwanderungspolitik / Arbeits{\"o}konomie / Deutschland},
  library={UB [Signatur: 2016 Q 86]},
}
@book{UBHD-68024935,
  author={Keller, Nicolas},
  organization={Universit{\"a}t Heidelberg},
  title={Essays on immigration policies},
  address={Heidelberg},
  year={2016},
  pages={1 Online-Ressource (VI, 172 Seiten)},
  language={eng},
  note={Gesehen am 07.12.2016},
  school={Dissertation,  Universit{\"a}t Heidelberg,  2016},
  doi={10.11588/heidok.00021560},
  keywords={Einwanderung / Einwanderungspolitik / Arbeits{\"o}konomie},
  url={https://nbn-resolving.org/urn:nbn:de:bsz:16-heidok-215607},
  library={UB},
}