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Functions to calculate some point estimators and estimating their variance under unequal probability sampling without replacement. Single and two stage sampling designs are considered. Some approximations for the second order inclusion probabilities are also available (sample and population based). A variety of Jackknife variance estimators are implemented. Almost every function is written in C (compiled) code for faster results. The functions incorporate some performance improvements for faster results with large datasets.
Package details 


Author  Emilio Lopez Escobar [aut, cre, cph] <[email protected]>, Ernesto Barrios Zamudio [ctb] <[email protected]>, Juan Francisco Munoz Rosas [ctb] <[email protected]> 
Maintainer  Emilio Lopez Escobar <[email protected]> 
License  GPL (>= 2) 
Version  1.3 
URL  http://www.numerika.mx http://www.itam.mx 
Package repository  View on CRAN 
Installation 
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