RDP 2018-08: Econometric Perspectives on Economic Measurement Equation (5)

e^{{\hat{α}}_{2}^{W L S} - {\hat{α}}_{1}^{W L S}} = {\prod_{v} (\frac{p_{2 v}}{p_{1 v}})}^{w_{v}^{T o r n q v i s t}} \equiv {\hat{P}}_{1, 2}^{T o r n q v i s t}