Media type: E-Article Title: Free-Riding on Altruistic Punishment? An Experimental Comparison of Third-Party-Punishment in a Stand-Alone and in an In-Group Environment Contributor: Lewisch, Peter G.; Ottone, Stefania; Ponzano, Ferruccio Published: Elsevier BV, 2010 Published in: SSRN Electronic Journal (2010) Language: English DOI: 10.2139/ssrn.1632345 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: