How to calculate variables with one year lag

[Saleh sharmah]

Dear members
I’m trying to creat new variable_ sales growth calculated as ( current year sales - last year sales)/ last year sales.

kindly, can anyone provide me with the code in calculating the above wanted variable?

thanks in advance

[Andrew Musau]

Duplicate post. If interested, see https://www.statalist.org/forums/for...ons-with-a-lag.