Leicester, Andrew; Oldfield, Zoë - Institute for Fiscal Studies (IFS) - 2009
aggregates. More recently, economists have begun to use spending information collected by market research companies that records … the TNS and EFS surveys and discuss the implications of this method of data collection for survey attrition. Broadly, we … suggest that problems of fatigue and attrition may not be so severe as may be expected, though there are some differences in …