Targeting Incentives in Mature Probability-based Online Panels
This paper complements earlier work about incentive effects in wave 5 of the Panel Survey of the Swiss Election Study (Selects) about the possibilities to decrease incentives for high estimated response propensity respondents. In the present paper, we study possibilities to decrease incentives in wave 6 for the complementary group, the low-propensity respondents. For high-propensity respondents, continuing an (expensive) conditional CHF 10 (cash) produced only slightly higher response rates and a similar sample composition compared with an (inexpensive) lottery (5 x 300 CHF) in wave 5. For low-propensity respondents, however, switching to the lottery produced an 8% points lower response …