Hello!
Stata keeps omitting the most important variable in the research due to collinearity. When I check cor correlations, it returns missing values. Both variables are based on the same variable. One is dummy, representing the presence of donations and the other one is categorical variable representing level of donations (small, medium and high, I excluded zero category to avoid redundancy). However, something is still wrong. This is panel data with, indeed, a lot of variables missing due to the nature of the data.
Thank you in advance for help!
Stata keeps omitting the most important variable in the research due to collinearity. When I check cor correlations, it returns missing values. Both variables are based on the same variable. One is dummy, representing the presence of donations and the other one is categorical variable representing level of donations (small, medium and high, I excluded zero category to avoid redundancy). However, something is still wrong. This is panel data with, indeed, a lot of variables missing due to the nature of the data.
Thank you in advance for help!
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