Duplicate title to Chen, X., Sasaki, T. ORCID: https://orcid.org/0000-0002-4635-1389, Brännström, Å., & Dieckmann, U. ORCID: https://orcid.org/0000-0001-7089-0393 (2013). First carrot, then stick: how the adaptive hybridization of incentives promotes cooperation. IIASA Interim Report. IIASA, Laxenburg, Austria: IR-13-026