\begin{align} \label{reg_dynamic}
   \Delta lnGDPpc_{i,t} = & \alpha_{i,t} + \theta_{1}lnGDPpc_{i,t-10} + (\beta_{1} +\gamma_{1})lnSLR_{i,t} + (\beta_{2} +\gamma_{2})lnSLR^{2}_{i,t}  \nonumber \\
    &  - \beta_{1} lnSLR_{i,t-10} - \beta_{2} lnSLR^{2}_{i,t-10}  + FEs + u_{i,t}
\end{align}
