Hi, The DATA is attached. I am trying to find the effect from Industry (dummy) on the Tobin variable with a random effect model, but when I do the regression with all 6 industry-dummies the dummy for the industry 'Industrials' gets a 0 parameter estimate. When I exclude one industry-dummy (not Industrials) the dummy for Industrials gets a parameter estimate. Could anyone tell me why this happen? 🙂
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