Table 3.

The summary of population size estimation methods categories

Categories	Definition of categories	Methods
Methods based on independent samples	Multiple independent sources of data are used to make the estimation	Capture-recapture method
Methods based on independent samples		Multiplier method
Methods based on population counting	Traditional geolocation and counting measures are used to estimate the size of the key population	Delphi method
Methods based on population counting		Mapping method
Methods based on the official report	The estimates are made by combining them with the official report	Workbook method
Methods based on social network	The key population is recruited from their social network	Respondent-driven sampling method
Methods based on social network	The key population is recruited from their social network	Network scale-up method
Methods based on data-driven technologies	The key population size is estimated by data-driven technologies	Bayesian estimation method
		Stochastic simulation method
		LMS estimation method