Scientists and epistemologists generally agree that a scientific law must be (a) relatively simple and (b) not contradicted by the available evidence. In this paper we propose and test one such law pertaining to international economics, the triple-parity law. It integrates three well-known...

Scientists and epistemologists agree that a scientific law must be relatively simple and not contradicted by the available evidence. We propose and test one such law pertaining to international economics, the triple-parity law. It integrates three well-known equilibrium conditions, which are...