<p>I recall seeing an answer to some question about linear mixed models where the answer showed an elegant notation for the model. Something like:</p>

<p>$$p(y|x,\gamma)=\mathcal{N}(\beta x+\gamma z,\sigma^2I),\quad \gamma\sim \mathcal{N}(0,\sigma_{\gamma}^2I)$$</p>

<p>I can't find it anymore, though. I saw it last year, but I can't remember whether it was from last year or earlier. I also thought it was @amoeba's, but it's not. I tried both Googling, and using the site search for [linear mixed model]. Can you help me find it?</p>
