#  strat: An Implementation of the Stratification Index 

 



An R package implementing the stratification index ([*Zhou 2012*](/publications/nonparametric-index-stratification)). The package provides two functions, srank(), which returns stratum-specific information, including population share and average percentile rank; and strat(), which returns the stratification index and its approximate standard error. When a grouping factor is specified, strat also provides a detailed decomposition of the overall stratification into between-group and within-group components. Available at [*https://cran.r-project.org/web/packages/strat*](https://cran.r-project.org/web/packages/strat).



 



 

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