title: Difference between predict and fittedvalue in statsmodel
body: <p>I have a very basic question, which I can somehow not find a real answer for.</p>
  <p>Assuming I have a model:</p>
  <pre><code>import statsmodels.formula.api as smf
  model = smf.ols(....).fit()
  </code></pre>
  <p>What is the difference between <code>model.fittedvalues</code> and <code>model.predict</code> ?</p>