cash Friedman rule fungibility George Selgin Greg Mankiw Marvin Goodfriend Miles Kimball nominal interest rates scrip shoe leather costs Tyler Cowen Paying interest on cash Ridwan X
demonetization Greg Mankiw Ken Rogoff Reserve Bank of India Silvio Gesell zero lower bound Demonetization by serial number Ridwan X
Alfred Marshall Dror Goldberg fiat money Greg Mankiw history of thought James Tobin John Maynard Keynes Milton Friedman Willem Buiter Yap stones and the myth of fiat money Ridwan X
