00367nam a2200121 a 450000500170000002000150001708200230003210000220005524500590007726000340013630000180017049000570018820251203092010.0  a0803951280  a300.15195,bD, har  aHardy, Melissa A.  aRegression with dummy variables, Melissa A. Hardy, eng  aLoNew Delhion, Sage, GBc1993  avi,90p.c18cm  aQuantitative applications in the social sciencesd93