Egen Variance

[Sergi Quintana]

Hey!

I am trying to check the variance of one of my variables by age of the individuals. I have a cross-section, not a panel. I would like to do something like:

egen varxx = var(xx) , by(age)

in the same way that you can do this for the mean. Is it possible to find a similar command?

Thanks in advance!

[Clyde Schechter]

No, there is no -egen- function to calculate variance. Not in official Stata, nor in the -egenmore- package. But variance is just the square of standard deviation. So:

egen varxx = sd(xx), by(age)
replace varxx = varxx*varxx