Editing Cluster sampling (section)

=== Economics ===
The [[World Bank]] has applied adaptive cluster sampling to study informal businesses in developing countries in a cost efficient manner, as the informal sector is not captured by official records and too expensive to be studied through simple random sampling.<ref>{{cite journal |last1=Aga |first1=Gemechu A. |last2=Francis |first2=David C. |last3=Jolevski |first3=Filip |last4=Rodriguez Meza |first4=Jorge L. |last5=Wimpey |first5=Joshua S. |title=An Application of Adaptive Cluster Sampling to Surveying Informal Businesses |journal=Journal of Survey Statistics and Methodology |date=January 2023 |volume=11 |issue=5 |pages=1246–1266 |doi=10.1093/jssam/smac037}}</ref> The approach follows a two-stage sampling whereby adaptive cluster sampling is used to generate an estimate of the universe of informal businesses in operations, while the second stage to obtain a random sample about the characteristics of those businesses.