TeX source:

\left\{ \begin{array}{lll} q_{Tr,t}=L_{Tr}(αd_{Tr,t−1}(a+\overline{a}−c_{Tr}−2b_{11}d_{Tr,t−1}−b_{12}d_{Or,t−1})−\widehat{d}_{Tr,t−1}) \\ +(L_{Tr+1})d_{Tr,t−1}+z(\widehat{σ}^{L}_{Tr,t}−\widehat{σ}^{L}_{Tr,t−1}) \\ q_{Or,t}=L_{Or}(βd_{Or,t−1}(a−c_{Or}+θ(\overline{φ}−φ)−b_{21}d_{Tr,t−1}−2b_{22}d_{Or,t−1})(1−φ)−\widehat{d}_{Or,t−1}) \\ −R_{Or,t} +(L_{Or}+1)d_{Or,t−1}+z(\widehat{σ}^{L}_{Or,t}−\widehat{σ}^{L}_{Or,t−1}) \end{array} \right.