Measures of effect size in Stata 13

Measures of Effect Size in Stata 13
Soruce: the Stata Blog
"Today I want to talk about effect sizes such as Cohen’s d, Hedges’s g, Glass’s Δ, η2, and ω2. Effects sizes concern rescaling parameter estimates to make them easier to interpret, especially in terms of practical significance.

Many researchers in psychology and education advocate reporting of effect sizes, professional organizations such as the American Psychological Association (APA) and the American Educational Research Association (AERA) strongly recommend their reporting, and professional journals such as the Journal of Experimental Psychology: Applied and Educational and Psychological Measurement require that they be reported.

Anyway, today I want to show you

What effect sizes are.
How to calculate effect sizes and their confidence intervals in Stata.
How to calculate bootstrap confidence intervals for those effect sizes.
How to use Stata’s effect-size calculator.

...". Read full text here