Dr.Han plans a large-scale panel study,with prospective design,and secures funding.There are many challenges to the project,and in an effort to minimize attrition,he

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Incentivizing participants with moderate cash payments can help to minimize attrition by increasing their motivation to remain in the study. This is a common practice in panel studies, as it helps to maintain a high response rate and keep the sample representative. Using two different samples at two different times may introduce additional sources of bias, as the two samples may differ in important ways that affect the study outcome. Establishing causality by collecting data at two different times is important, but it does not directly address the issue of attrition. Increasing the sample size for an initial national survey may be helpful in ensuring the sample is representative, but it does not necessarily address the issue of attrition over the course of the study.

DrHan Plans a Large-Scale Panel Study,with Prospective Design,and Secures Funding