LATELY — 18 July 2005

To Insure Promptness

Paper finds that white taxi passengers tip more than black passengers. Gee, that’s interesting, I thought, I wonder how they’re controlling for income? … as it happens, they don’t (“What we attribute to passenger race may be caused at least in part by a tendency of poorer people to tip less”) even though the median income of blacks in New Haven, Connecticut, is 65% of that of whites. (See also weak defense on page 33ff.)