span><span class="co">#&gt; <span style="color: #BCBCBC;">2</span> gdpPercap_log lifeExp lmer_ri_1 pop           all     lifeExp ~ gdpPercap_log…</span></span>
<span><span class="co">#&gt; <span style="color: #BCBCBC;">3</span> gdpPercap_log lifeExp lmer_ri_2 no covariates all     lifeExp ~ gdpPercap_log…</span></span>
<span><span class="co">#&gt; <span style="color: #BCBCBC;">4</span> gdpPercap_log lifeExp lmer_ri_2 pop           all     lifeExp ~ gdpPercap_log…</span></span>
<span><span class="co">#