title: Fixed effect in Pandas or Statsmodels
body: <p>Is there an existing function to estimate fixed effect (one-way or two-way) from Pandas or Statsmodels.</p>
  
  <p>There used to be a function in Statsmodels but it seems discontinued. And in Pandas, there is something called <code>plm</code>, but I can't import it or run it using <code>pd.plm()</code>.</p>