title: Export regression results as a csv file when using summary_out
body: <p>I am running multiple regressions using financial data from Yahoo! Finance and Fama-French factors from <a href="http://mba.tuck.dartmouth.edu/pages/faculty/ken.french/Data_Library/f-f_factors.html" rel="nofollow noreferrer">http://mba.tuck.dartmouth.edu/pages/faculty/ken.french/Data_Library/f-f_factors.html</a> </p>
  
  <p>Single factor regression: </p>
  
  <pre><code>CAPM = sm.ols( formula = 'Exret ~ MKT', data=m).fit(cov_type='HAC',cov_kwds={'maxlags':1})
  </code></pre>
  
  <p>Three factor regression: </p>
  
  <pre><code>FF3 = sm.ols( formula = 'Exret ~ MKT + SMB + HML',     
  data=m).fit(cov_type='HAC',cov_kwds={'maxlags':1})
  </code></pre>
  
  <p>I then utilise <code>summary_col</code> to create a table with significance stars: </p>
  
  <pre><code>dfoutput = summary_col([CAPM,FF3],stars=True,float_format='%0.4f',
  model_names=['GOOG','GOOG'],info_dict={'N':lambda x: "{0:d}".format(int(x.nobs)),'Adjusted R2':lambda x: "{:.2f}".format(x.rsquared_adj)}, regressor_order = ['Intercept', 'MKT', 'SMB', 'HML'])
  </code></pre>
  
  <p><strong>Output</strong></p>
  
  <pre><code>dfoutput
  Out[311]: 
  &lt;class 'statsmodels.iolib.summary2.Summary'&gt;
  """
  
  =================================
               GOOG I       GOOG II  
  ---------------------------------
  Intercept   -0.0009***   -0.0010***
              (0.0003)      (0.0003)  
  MKT         0.0098***     0.0107*** 
              (0.0003)      (0.0003)  
  SMB                      -0.0033***
                            (0.0006)  
  HML                      -0.0063***
                            (0.0006)  
  N              1930         1930      
  Adjusted R2    0.37         0.42      
  =================================
  Standard errors in parentheses.
  * p&lt;.1, ** p&lt;.05, ***p&lt;.01
  </code></pre>
  
  <p>I have the following two questions:</p>
  
  <ol>
  <li><p>Is it possible to change the standard errors in parentheses to t-stats?</p></li>
  <li><p>Is it possible to export the results of the <code>summary_col</code> function to Excel as a <code>csv</code> file?</p></li>
  </ol>