?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Hu&rft.aufirst=Wei&rft.issue=n%C2%B0+2&rft.volume=vol.+38&rft.date=April+2018&rft.issn=1545-2921&rft.atitle=Intergroup+Conflict+with+Intragroup+Altruism&rft.title=Economics+Bulletin&rft.pages=720-724&rft.genre=article