='st'>"ols"</span>,
    estimation_start <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/as.Date.html'>as.Date</a></span><span class='op'>(</span><span class='st'>"2019-04-01"</span><span class='op'>)</span>,
    estimation_end <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/as.Date.html'>as.Date</a></span><span class='op'>(</span><span class='st'>"2020-03-13"</span><span class='op'>)</span>
<span class='op'>)</span>

</div></pre>
  </div>
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