Media type: E-Article Title: Competence-difficulty gaps, ethics and the new social welfare theory Contributor: Roth, Timothy P. imprint: Elsevier BV, 1997 Published in: The Journal of Socio-Economics Language: English DOI: 10.1016/s1053-5357(97)90014-7 ISSN: 1053-5357 Keywords: Economics and Econometrics Origination: Footnote: