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Credit Cards and Inflation


John Geanakoplos


Yale University - Cowles Foundation

Pradeep K. Dubey


SUNY Stony Brook - Center for Game Theory in Economics

June 18, 2009

Cowles Foundation Discussion Paper No. 1709

Abstract:     
The introduction and widespread use of credit cards increases trading efficiency but, by also increasing the velocity of money, it causes inflation, in the absence of monetary intervention. If the monetary authority attempts to restore pre-credit card price levels by reducing the money supply, it might have to sacrifice the efficiency gains. When there is default on credit cards, there is even more inflation, and less efficiency gains. The monetary authority might then have to accept less than pre-credit card efficiency in order to restore pre-credit card price levels, or else it will have to accept inflation if it is unwilling to cut efficiency below pre-credit card levels. This could be a source of stagflation.

Number of Pages in PDF File: 51

Keywords: Credit cards, Outside money, Inside money, Central bank, Inflation, Stagflation

JEL Classification: D50, D51, D53, D61, E40, E50, E51, E52, E58

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Date posted: June 18, 2009  

Suggested Citation

Geanakoplos, John and Dubey, Pradeep K., Credit Cards and Inflation (June 18, 2009). Cowles Foundation Discussion Paper No. 1709. Available at SSRN: http://ssrn.com/abstract=1421960 or http://dx.doi.org/10.2139/ssrn.1421960

Contact Information

John Geanakoplos (Contact Author)
Yale University - Cowles Foundation ( email )
Box 208281
New Haven, CT 06520-8281
United States
203-432-3397 (Phone)
203-432-6167 (Fax)
HOME PAGE: http://cowles.econ.yale.edu/P/au/d_gean.htm
Pradeep K. Dubey
SUNY Stony Brook - Center for Game Theory in Economics ( email )
Stony Brook, NY 11794
United States
631-632-7555 (Phone)
631-632-7516 (Fax)
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