Should income transfers be conditional upon personal characteristics of the potential recipients (the so-called quot;taggingquot;) or should they only be tied to reported incomes? There is clear evidence that tagging and its assessment of the eligibility of applicants creates stigmatization. In...

Should income transfers be conditional upon personal characteristics of the potential recipients (so-called tagging), or should they only be tied to reported incomes? A still widespread social norm consists in requiring that individuals (of working age) support themselves and their families....

This paper characterizes optimal income taxation when individuals respond along both theintensive and extensive margins. Individuals are heterogeneous across two dimensions:specifically, their skill and disutility of participation. Preferences over consumption and workeffort can differ with...