PURCHASING POWER PARITY DOCTRINE: AN UNRESTRICTED COINTEGRATION TEST
The purchasing power parity hypothesis is investigated within a highly economically integrated set of nations, namely the European Monetary System. We use the PhillipsâHansen Fully Modified Ordinary Least Squares procedure, which for the first time allows for an unrestricted cointegration test of the PPP doctrine. We sequentially test for the weak and strong form of PPP.