The presence of transaction costs in trading implies a non-linear adjustment process of real exchange rates towards Purchasing Power Parity (PPP). This may make the traditional tests for PPP using a linear framework, which generally tend to refute the PPP hypothesis, unreliable. This study...

A method for analyzing productivity convergence based on frontier production functions is proposed. It is examined whether departures from the frontier - country-level inefficiencies - exhibit long-run relationships and convergence. The method is applied to 1-digit industries of 14 OECD...