Gomis-Porqueras, Pedro; Sanches, Daniel R. - Federal Reserve Bank of Philadelphia - 2011
. Specifically, they characterize the optimal return on money in the presence of credit arrangements. There is a dual role for credit …: It allows buyers to trade without fiat money and also permits them to borrow against future income. However, not all … traders have access to credit. As a result, there is a social role for fiat money because it allows agents to self …