This paper investigates how to test for nonresponse selection bias in wage functions induced by missing income information. We suggest an “easy-to-implement” approach which requires information on interviewer IDs and the interview date rather than hard-to-get interviewer characteristics.

This paper investigates how to test for nonresponse selection bias in wage functions induced by missing income information. We suggest an "easy-to-implement" approach which requires information on interviewer IDs and the interview date rather than hard to get interviewer characteristics.

Item nonresponse is often dealt with through imputation. Marginal imputation, which consists of treating separately each variable requiring imputation, generally leads to biased estimators of parameters (e.g., coefficients of correlation) measuring relationships between variables. Shao and Wang...