title: Stata: selecting the reference variables in an interaction
body: <p>When I run the following regression,</p>
  
  <pre><code>reg subject inSchool#treatment#male
  </code></pre>
  
  <p>I get comparisons in reference to inSchool=0, treatment=0, and male=0, but I would like to be able to change the reference variables.</p>
  
  <p>For example I would like to have all the comparisons done in reference to inSchool=1,treatment=0, and male=1.</p>
  
  <p>I have used the following characteristic command but it doesn't seem to have an effect.</p>
  
  <pre><code>char inSchool[omit] 1 male[omit] 1
  </code></pre>
  
  <p>Am I having a syntax issue or is there no way to choose which variable to omit using # </p>
  
  <p>Thanks in advance!</p>