在現實社會上，購買物品的方式不侷限於現金，包含信用卡、車貸、信貸等各種消費性貸款，都可以幫助家戶購買消費商品；過去理論文獻也不乏有討論這些信用消費財或信用消費方式對經濟變數的影響。然而，文獻中均設定在家戶將準時清償其信用消費做出長期的討論。
近年來，我國在各種消費性貸款及信用餘額屢創新高，同時也可發現各種消費商品的價格卻不斷提高，細觀其中許多交易皆建立在信用方式上，在信用消費方式多元化的今天，需求將帶動價格上升是很正常的現象；但若透過信用交易的家戶並未如期清償，將額外增加一筆循環利息，此一利息非央行所能控制；伴隨利息進入體系後，信用角色對總體經濟變數，也將出現不同於過去文獻的影響。
本文利用預付現金模型透過家戶最適選擇，討論加入信用角色的通貨膨脹效果，尤其著重討論在金融機構提供信用消費方式後，其所提出之約訂利率對各經濟變數的影響；除了恆定狀態的討論外，也利用預付現金模型做出短期效果。
而最終可以發現，家戶越偏好信用消費方式將放大貨幣供給成長率對通貨膨脹的影響，而約訂利率也同樣有著放大的效果；即若家戶未能準時償還其信用消費，則通貨膨脹率將異常提高，不同於以往文獻的結論。

This paper uses the cash-in-advance (CIA) model for the household optimization problem, studying the effects of inflation with the role credit. The paper especially focuses on the effects of contracted interest rate of credit, which is contracted after the financial organizations provide the loan for credit-good consumption, on various economic variables.  Besides the steady-state effects, this paper also studies the short-run effect of credit in the CIA model.
We find that the more the household prefer the credit-good consumption, the longer the relationship between the growth rate of money supply and the inflation rate, and also the contracted interest rate.  It means that, if the household had not been able to repay its credit goods punctually, the inflation rate will increase exceptionally; this conclusion is different from those previous.

第一章	緒論
       ─────────────────────────1
第二章	文獻回顧
       ─────────────────────────6
第三章	基本模型
       ─────────────────────────13
第四章	延伸模型－本期需以現金清償上期信用消費
       ─────────────────────────20
第五章	延伸模型－以現金消費比例取代兩消費變數導入恆定分析
       ─────────────────────────31
第六章	結論
       ─────────────────────────39
附錄1
       ─────────────────────────41
附錄2
       ─────────────────────────43
參考文獻
       ─────────────────────────45

莊希豐 陳亞為 (2000), 通貨膨脹和恆定資本累積之兩部門預付現金模型, 經濟論文叢集, 28(1), 73-94.
霍德明 莊希豐 (2006), 貨幣銀行學, 指南書局.
Chari, V. V., Jones, L. E. and Manuelli, R. E. (1995), The growth effects of monetary policy, Federal Reserve Bank of Minneapolis Quarterly Review, 19(4), 18-32.
Chari, V. V., Jones, L. E. and Manuelli, R. E. (1996), Inflation, growth, and financial intermediation, Federal Reserve Bank of Saint Louis Review, 78(3), 41-58.
Chuang, S. F. (2004), Steady-state real effects of inflation in a Heckscher-Ohlin cash-in-advance model, Macroeconomic Dynamics, 8, 633-647.
Englund, P. and Svensson, L. E. O. (1988), Money and banking in a cash-in-advance economy, International Economic Review, 29(4), 681-705.
Fisher, S. (1979), Anticipations and the nonneutrality of money, Journal of Political Economics, 87(21), 225-252.
Huo, T. M. (1997), Inflation and capital accumulation in a two-sector cash-in-advance economy, Journal of Macroeconomics, 19:1, 103-115.
Ireland, P. N. (2002), Endogenous money or sticky prices?, NBER working paper, 9390.
King, R. G. and Plosser, C. I. (1984), Money, credit, and price in a real business cycle, American Economic Review, 74(3), 363-380.
Li, V. E. (2000), Household credit and the monetary transmission mechanism, Journal of Money, Credit and Banking, 32(3), 335-356.
Lucas, R. E. and Stokey, N. L. (1987), Money and interest in a cash- in- advance economy, Econometrica, 53, 491-514.
Lucas, R. E. (1988), On the mechanics of economic development, Journal of Monetary Economics, 22, 3-42.
Marquis, M. H. and Reffett, K. L. (1991), Real interest rates and endogenous growth in a monetary economy, Economics Letters, 37, 105-109.
Rotemberg, J. J. (1982), Sticky prices in the United States, Journal of Political Economy, 90(6), 1187-1211.
Rotemberg, J. J. (1994), Price, output and hours: an empirical analysis based on a sticky price model, NBER working paper, 4948.
Sidrauski, M. (1967), Rational choice and patterns of growth in a monetary economy, American Economic Review, 57, 534-544.
Steindl, F. G. (2000), Credit cards, economization of money, and interest rates, Journal of Economic Education, 33(3), 271-279.
Stockman, A. C. (1981), Anticipated inflation and capital stock in a cash-in –advance economy, Journal of Monetary Economics, 8, 387-393.
Stockman, A. C. (1985), Effects of inflation in the pattern of trade, Canadian Journal of Economics, 18, 587-601.
Tobin, J. (1965), Money and economic growth, Econometrica, 33, 671-684.
Tobin, J. (1970), Money and income: post hoc ergo propter hoc?, Quarterly Journal of Economics, 84:2, 301-317.