Research apps allow to administer survey questions and passively collect smartphone data, thus providing rich information on individual and social behaviours. Agreeing to this novel form of data collection requires multiple consent steps, and little is known about the effect of...

Looping questions are used to collect data about several similar events, such as employment spells, retirement accounts, or marriages. The questions collect information about the number of events experienced as well as details about each one. The questions require respondents to think hard to...

Panel survey participation can bring about unintended changes in respondents' behavior and/or reporting of behavior. Using administrative data linked to a large panel survey, we analyze changes in respondents' labor market behavior. We estimate the causal effect of panel participation on the...