Bayesian methods

Multilevel Regression and Poststratification (MRP) is a method of adjusting model estimates for non-response. By “non-response” we mean under-sampled groups in a population. For example, imagine conducting a phone survey to estimate the percentage of a population that approves of an elected official. It’s likely that certain age groups in the population will be under-sampled because they’re less likely to answer a call from an unfamiliar number. MRP allows us to analyze the data and adjust the estimate by taking the under-sampled groups into account.