<th>X</th>
      <td><p>A covariate matrix (p x n) with no intercept</p></td>
    </tr>
    </table>
    
    <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>

    <p>A list with 2 elements: <code>tauestimate</code>, <code>varestimate</code>, where
  <code>tauestimate</code> is a vector of estimates for pairwise treatment effects,
  and <code>varestimate</code> is a vector of variance estimates for
  <code>tauestimate</code>, using Abadie &amp; Imbens (2006)'s method.</p>
    