Making comparisons between the variables as measured in the 2012 and 2019 National Surveys of Early Care and Education presents specific bias risks due to the fact that the two datasets are not longitudinal. This webinar provides a detailed strategy for researchers who are analyzing both 2012 and 2019 NSECE datasets. A four-step process designed to reduce bias is demonstrated using an example of the estimated number of children served by home-based providers in the two datasets.