Two nonparametric procedures for detecting differentialitem functioning (DIF)-the Mantel-Haenszel(MH) procedure and the simultaneous item bias (SIB)procedure-were compared with respect to their Type Ierror rates and power. Data were simulated to reflectconditions varying in sample size, ability...

In recent years, the focus in the study of household behavior has shifted from the household as a homogeneous unit (unitary model) to the different individuals comprising the household (collective model). There are several issues (such as preferences heterogeneity among household members,...