Simulating Data in R
R packages
simstudy
https://cran.r-project.org/web/packages/simstudy/vignettes/simstudy.html
psych::sim.multilevel
http://personality-project.org/r/html/sim.multilevel.html
Re-creating data sets
A complex but thorough simulation example from idre.ucla
http://stats.idre.ucla.edu/r/codefragments/mesimulation/
Mark-recapture designs for wildlife studies
https://sites.google.com/site/wild8390/software/simulate
Multilevel Simulation with specified ICC
https://psychometroscar.wordpress.com/simulate-a-2-level-multilevelhlmlinear-mixed-model/
Other
http://clayford.github.io/dwir/dwr_12_generating_data.html
https://web.stanford.edu/class/bios221/labs/simulation/Lab_3_simulation.html
http://www.quantumforest.com/2011/10/simulating-data-following-a-given-covariance-structure/