#### Thanks! We'll let you know when the book is available for purchase.

Close this message

#### Thanks! We'll let you know when the book is available for purchase.

Close this message

## Technical appendix

This section will take a mathematical approach to sampling and estimation in probability and non-probability samples. It will draw on Särndal, Swensson, and Wretman (2003) and Särndal and Lundström (2005).