@TECHREPORT {SFB649DP2017-002,
  AUTHOR={Helbing, Georg and Shen, Zhiwei and Odening, Martin and Ritter, Matthias},
  TITLE={{Estimating location values of agricultural land}},
  YEAR=2017,
  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/SFB649DP2017-002.pdf},
  NUMBER={2017-002}
}