Retirement Study to compare the measurement quality of a number of scales between face-to-face, telephone and Web modes. Panel … and decrease non-response error it may have detrimental effects on measurement quality. This can happen because different … modes have distinct measurement biases which, when combined with selection effects, can increase the total survey error of a …

Labor supply estimates are sensitive to the measures of health used. When self reported measures are used health seems … incorporating both self-reported and objective measures of health. I use the model to show the potential biases involved in using … either measure of health or in using one to instrument the other- When outside information on the validity of self …