Hello,

Can someone help me with using cross-validation to compare the seasonal naive method with Holt-Winters' additive seasonal exponential smoothing method? I have 280 observations and two variables which are t and v90. t is quarterly dates and v90 is the actual data. I am trying to make one year ahead forecast using all but the last two years of data. I'm having a lot of trouble trying to cross validate the two methods. Any help would be great!
Thank you! (Using Stata/IC 16.1)