EFFECTS OF A PREPAID NONMONETARY INCENTIVE ON RESPONSE RATES AND RESPONSE QUALITY IN A FACE-TO-FACE SURVEY

We conducted a randomized experiment on a face-to-face interview surve y in order to test the effects on response rates of a prepaid nonmonet ary incentive. Results showed a statistically significant increase in response rates, mostly through reduction in refusal rates, in the half sample that received the incentive (a gift-type ballpoint pen) as com pared with a no incentive control group. The effect appears to be due to greater cooperation from incentive recipients at the initial visit by an interviewer. Unexpectedly, the incentive group also showed a sig nificantly higher rate of sample ineligibility, possibly due to easier identification of vacant residences or nonexistent addresses. In addi tion, evidence suggests greater response completeness among responding incentive recipients early in the interview, with no evidence of incr eased measurement error due to the incentive.