RDP 9204: The Term Structure of Interest Rates, Real Activity and inflation Equation (A1)

[\begin{array}{l} \dot{ϒ} \\ \dot{R} \end{array}] = [\begin{array}{l} - α & - β \\ - \bar{R} k & \bar{R} \end{array}] [\begin{array}{l} ϒ - \bar{ϒ} \\ R - \bar{R} \end{array}]