A better rim weighting algorithm
Michael Baxter
Kantar Media
Introduction
Results from sample surveys are typically grossed up to give data for the total population. The simplest procedure is that if there are n respondents and N people (or n responding households and N households in total) in the population, all results are multiplied by a grossing factor N/n. However, more sophisticated grossing procedures are available that can reduce bias caused by unrepresentative sampling and non-response bias (Brick & Kalton 1996). A sample may come from a one-off...