Hi! How can I substitute a variable like GDP (with values by quarter) for dummy variables like 2011Q1 (dummy 1), 2011Q2 (dummy 2), etc. My professor told me to look for "year dummies" but I don't find much information about it. It is to later incorporate in an estimation of a model. I'm not an expert in stata, quite the opposite. But I know what dummy variables are (with values 0 and 1), but I don't understand how a 0 and a 1 can carry information about GDP.
Many thanks
Many thanks
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