<p>I think it was created after I asked <a href="https://stats.stackexchange.com/q/83136/37729">this question</a>, since I didn't see it when I posted my question and someone added it later. </p>

<p>The <a href="https://stats.stackexchange.com/tags/facebook/info">"facebook"</a> tag is probably overlapped with the <a href="https://stats.stackexchange.com/tags/social-network/info">"social-network"</a> tag, at least for statistical purposes.</p>
