Calculate the optimal sample allocation that minimizes the variance of treatment effect in multilevel randomized trials under fixed budget and cost structure, perform power analyses with and without accommodating costs and budget. The references for proposed methods are: (1) Shen, Z., & Kelcey, B. (2018, April). Optimal design of cluster randomized trials under condition and unitspecific cost structures. Roundtable discussion to be presented at American Educational Research Association (AERA) annual conference; (2) Shen, Z., & Kelcey, B. (under review). Optimal sample allocation under unequal costs in clusterrandomized trials. Journal of Educational and Behavioral Statistics; (3) Shen, Z.(in progress). Using optimal sample allocation to improve design efficiency for multilevel randomized trials. (Unpublished doctoral dissertation). University of Cincinnati, Cincinnati, OH.
Package details 


Author  Zuchao Shen [aut, cre] 
Date of publication  20180103 15:55:00 UTC 
Maintainer  Zuchao Shen <[email protected]> 
License  GPL3 
Version  0.7.3 
Package repository  View on CRAN 
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