Hi, folks - I want to develop some statistical models using different training samples and then test their forecasting power on different holdout sample. For this purpose, I used window rolling approach in where both training and holdout sample move ahead untile specific year. %let LT=2000; %let UT=2005; %let LH=2006; %let UH=2008; %macro_static_models(LT=<, UT=&UT, LH=&LH, UH=&UH); so in the next round, I want to move one year ahead and have; %let LT=2001; %let UT=2006; %let LH=2007; %let UH=2009; % macro_static_models (LT=<, UT=&UT, LH=&LH, UH=&UH) ; the LT will stop at 2009. Do you have any suggestion how can I incorporate Do loop? Thanks
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