Kingston (1996) is incorrect to assert class theory assumes intergener
ational immobility. Class theory simply assumes some class structural
mechanisms but such mechanisms do not presuppose immobility. Relative
mobility patterns illustrate one fundamental way that class mechanisms
operate and class-structured relative mobility patterns coexist along
side substantial absolute mobility for good reason. Kingston's prefere
nce for absolute over relative mobility is not the basis for sustained
scientific research into mobility regimes.