using rangerun with entropyetc

[Harry Kaj]

Hello, I have this example dataset.
I am attempting to calculate Simpsons Index using entropytec but I would like to do it over a one year rolling window.
I tried:

program entropy
    entropyetc STAFF, by(CUSTOMER YEAR) gen(3=R)
end

rangerun entropy,interval(YEAR 0 1)

But of course, this doesn't solve the problem. Would you have any suggestions?

clear
input str1 CUSTOMER double(STAFF YEAR)
"A" 1 2015
"A" 1 2015
"A" 1 2015
"A" 2 2016
"A" 2 2015
"B" 1 2014
"B" 1 2014
"B" 1 2014
"B" 1 2015
"B" 1 2015
"A" 2 2016
"B" 2 2015
end

[Nick Cox]

Well, interval(0 1) is a two-year rolling window. So, that needs to be clarified.

That said, I think https://www.statalist.org/forums/for...rolling-window is your problem in different guise for the Gini-Turing-Yule-Simpson-Hirschman-Herfindahl-Blau-goodnessknowswhoelse sum of squared probabilities.

[Harry Kaj]

Oh, yes, sorry I meant 2-year rolling window.

Thanks for the link, it works!