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pls, i need help! some1 analyzed a data using daily entries, tested for arch effect and concluded that arch errors are present, but when i did d same with monthly data, same company, i got an response of "no arch errors". The procedure i used is as follows: 1. i estimated equation y = c + ...

The most elegant solution is to not have the non-trading days in your workfile, by structuring it as dated with date series.

please, how can one structure it as dated with date series? 1OQ.