 class='fl'>1</span>,<span class='fl'>1</span>,<span class='fl'>1</span>,<span class='fl'>3</span>,<span class='fl'>2</span>,<span class='fl'>3</span>,<span class='fl'>2</span>,<span class='fl'>1</span>,<span class='fl'>2</span>)
  <span class='fu'>multilevelMatchX</span>(<span class='no'>Y</span>,<span class='no'>W</span>,<span class='no'>X</span>)</div><div class='output co'>#&gt; $tauestimate
#&gt; EY(2)-EY(1) EY(3)-EY(1) EY(3)-EY(2) 
#&gt;  -10.666667    6.666667   17.333333 
#&gt; 
#&gt; $varestimate
#