</mo></mrow></mrow></msqrt><mo>,</mo></mrow><annotation encoding="application/x-tex">\begin{equation}
SE(\hat{\boldsymbol{\theta}}) = \sqrt{C_{jj}(\hat{\boldsymbol{\theta}})},
\end{equation}</annotation></semantics></math></p>
<p>To install the package, type the following commands:</p>
<div class="sourceCode" id="cb1"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="kw">if</span> <span class="op">(</span><span class="op">!</span><span class="kw"><a href="https://rdrr.io/r/bas