There is a vast literature on how incentives affect response rates as well as response quality in cross-sectional (one point in time) and longitudinal surveys (repeated observations) in higher-income countries. However, there is more limited evidence around applicability to lower- and medium- income countries (LMICs). IPA Colombia tested how the effect of an increase in incentive size affects response rates, response quality, and response distributions. Consistent with prior research, they found no significant differences in response rates, item non-response, and no pattern of differences in responses when incentive amounts were increased.
Phone Survey Methods Resource
January 25, 2021