In organizational survey research, low response rates are a serious problem. Research into possible survey designs to improve these response rates is thus very important. To obtain insights on the use of incentives to achieve better response rates in organizational surveys, we decided to do a meta-analysis of experimental research on the effectiveness of incentives in organizational surveys. The advantage of a meta-analysis is that you can synthesize research results of a set of previous studies, with the potential to assess whether an overall effect exists, as opposed to a one-time experiment which is more limited by the specific situation and features of the study. Additionally, with an analysis of study characteristics, it is possible to detect if there are variables that moderate the overall effectiveness. For this moderator analysis, we coded features of the studies and then investigated their effect on the effect size. The research process became a flexible process, in which we made important decisions on the steps to be made as we progressed toward the completion of the study, instead of a priori deciding on all the details of the research design.