Thanks Rick. I have a question about generating multivariate data. I just started learning simulation and I want to generate multivariate data that are correlated, say .60, but with a skewed distribution. How I thought about doing this is: first, generate the correlated data from a normal distribution (mean=0, and variance=1), and then second, transform it into a chi-square distribution (with df=3 that reflects a skewness=1.63 and a kurtosis=4). I know how to do the first step, but I'm stuck with the second step on how to do it. In the first place, is it even right to do the second step (i.e., transform it into a chi-square distribution?). If not, is there a better way to do it? Thanks, Ariel ... View more

Hi Rick! Do you a sample simulation code to generate multilevel data (nested data)? An example of this is a cluster-randomized trial (CRT) design where the treatment is implemented at the group level while the outcome is measured at the individual level? Thanks, Aye ... View more