<p>Here is the example of <a href="https://mathoverflow.net/questions/63134/a-sequence-of-order-statistics-from-an-iid-sequence">one question</a>. It was asked on stats.SE, I gave a bounty on it. After nobody answered it was migrated to math.SE, and then I gave bounty there. In the end I've posted it on MO, from my own account (I was not the one who asked the question in the first place). The question was finally answered on MO.</p>

<p>So my advice with the question for posting the question would the following. </p>

<ol>
<li>Pick either math.SE or stats.SE. Ask the question. </li>
<li>If nobody answers propose bounty.</li>
<li>If nobody answers then, ask the admins to migrate the question to either math.SE or stats.SE</li>
<li>If nobody asks then, ask it on MO, mentioning the history.</li>
</ol>
