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$ \phi _{\epsilon _i}$


$\displaystyle \phi_{\epsilon_i}\vert.$ $\displaystyle \sim$ $\displaystyle Ga \left(\frac{T}{2}+\tilde{a}_{\epsilon}, \frac{1}{2} \left[ \su... ...t( \sum_{j\in{\cal N}_{i}}\beta_{ij} q_{j(t-1)} \right. \right. \right. \right.$  
    $\displaystyle \qquad \qquad \left. \left. \left. \left. +\sum_{p=1}^P \alpha_{ip}q_{i(t-p)} \right) \right)^2 +2\tilde{b}_{\epsilon} \right] \right)$ (30)