title: Stata - postfile error
body: <p>Why do I get a "invalid name" (see last line)?</p>
  
  <pre><code>tempname vector
  postfile `vector' beta_lag    beta_const /// 
                se_mvalue   se_const   /// 
            using vettore, replace
  
  xtreg Perf lag if t&gt;=396 &amp; t&lt;=408
  post `vector' (_b[lag])  (_b[_cons]) ///
                (_se[lag]) (_se[_cons])
  </code></pre>
  
  <p>RESULT: </p>
  
  <pre><code>. (regression is ok, omitted result...)
  . post `vector'  (_b[lag])  (_b[_cons]) (_se[lag]) (_se[_cons])
  ( invalid name
  </code></pre>
  
  <p>Thank you in advance</p>