Forecasting EUR/PLN Exchange Rate: the Role of Purchasing Power Parity Hypothesis in ESTVEC Models

The purpose of this paper is to verify empirical consequences of imposing various forms of purchasing power parity (PPP) within a class of smooth transition vector error correction models (ESTVECM) for analysis of EUR/PLN exchange rage. Empirical importance of exponential smooth transition functions is confronted with the linear error-correction mechanism. A class of competing models for recursive samples are compared by the like-lihood ratio test, information criteria, and out of sample forecast accuracy measures.