I have data on 300,000 graduates and am running an ordered probit regression to see how degree class achieved relates to various social background characteristics. There are many missing values within my dataset and I am looking to test whether the probability of a value being missing can be predicted by my main variables, i.e. are people more likely to report a missing value if they are attending a less selective university. I am unsure on how to look for such sample selection within stata.
Thank you.
Thank you.
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