Hello, i want to estimate a model where around 5000 firms are nested in 30 industries and i have five observations per firm over the years 2004-2008. I want to estimate the portion of variance in firm profits that is explained by the factor 'firm' and the portion explained by the factor 'industry'. Additionally i want to get the firm specific time effect (residual). In the first step I dont want any covariates. I tried the following proc mixed procedure code: proc mixed noclprint covtest; class firm industry; model profit = /solution ddfm=bw; random intercept/sub=firm; random intercept/sub=industry; run; the result i get shows me that i only have one subject instead of 5000. How can i tell sas that i have multiple observations per firm? i'm not sure how and if i have to use the 'repeated' option here? i dont find any examples with repeated observations per subject and two additional levels (firm and industry in this case) would be nice if you could help me! Thanks Alex
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