c(person("Zuchao", "Shen", email = "zuchao.shen@gmail.com", role = c("aut", "cre")),
person("Ben", "Kelcey", role = "aut"))
Calculate the optimal sample allocation that produces smallest variance of a
treatment effect or the highest statistical power
for experimental studies under a budget constraint,
perform power analyses with and without accommodating cost structures of sampling, and calculate
the relative efficiency between two sample allocations.
The references
for the proposed methods are:
(1) Shen, Z. (2019). Optimal sample allocation in multilevel Experiments.
(Doctoral dissertation). University of Cincinnati, Cincinnati, OH.
(2) Shen, Z., & Kelcey, B. (in press).
Optimal sample allocation under unequal costs in
cluster-randomized trials.
Journal of Educational and Behavioral Statistics.
(3) Champely., S. (2018). pwr: Basic functions for power analysis
(Version 1.2-2) [Software]. Available from
<https://CRAN.R-project.org/package=pwr>.

c(person("Zuchao", "Shen", email = "zuchao.shen@gmail.com", role = c("aut", "cre")),
person("Benjamin", "Kelcey", role = "aut"))
Calculate the optimal sample allocation that produces the highest statistical power
for experimental studies under a budget constraint,
perform power analyses with and without accommodating cost structures of sampling, and calculate
the relative efficiency between two sample allocations.
The references
for the proposed methods are:
(1) Shen, Z., & Kelcey, B. (2020).
Optimal sample allocation under unequal costs in
cluster-randomized trials.
Journal of Educational and Behavioral Statistics, 45(4): 446-474.
<doi:10.3102/1076998620912418>
(2) Shen, Z., & Kelcey, B. (in press). Optimal sample
allocation in multisite randomized trials. The Journal of Experimental Education.
<doi:10.1080/00220973.2020.1830361>
(3) Shen, Z., & Kelcey, B. (in press). Optimal sampling ratios in three-level
multisite experiments. Journal of Research on Educational Effectiveness.
<doi:10.1080/19345747.2021.1953200>
(4) Champely, S. (2020). pwr: Basic functions for power analysis
(Version 1.3-0) [Software]. Available from
<https://CRAN.R-project.org/package=pwr>.
Zuchao Shen [aut, cre],
Benjamin Kelcey [aut]