Amartya Sen has argued that many development and freedom measures such as health, education, political and civil liberties are important constituents of human welfare. We concur with Sen and conjecture that an important reason these measures affect human welfare is because they allow individuals...

Relative purchasing power parity (PPP) holds for pure price inflations, which affect prices of all goods and services by the same proportion, while leaving relative prices unchanged. Pure price inflations also affect nominal returns of all traded financial assets by exactly the same amount....