Return to Contents Page


Consumption, Saving, and the Supply of Loanable Funds


Consumption is a function of income and, possibly, the interest rate.  The marginal propensity to consume is often assumed to be close to, but less than one.


Savings is an increasing function of income and, possible, the interest rate.  S(Y,R).

Getting Started with EconModel

The EconModel presentations are interactive graphical simulations of models.  more info.

To activate the EconModel presentation you need to download and install the EconModel program.  more info.


The EconModel presentation shows that savings results from intertemporal substitution.  In this generalization of the Two Goods - Two Prices Model, agents maximize utility over two goods:  consumption in the present and consumption in the future.  The interest rate plays the role of the relative price of these two options.

Budget Constraint

Indifference Curves

The Interest Rate

Permanent Income Hypothesis

An alternative view.


Intertemporal Consumption, Wikipedia.

Permanent Income Hypothesis, Wikipedia.

Return Link:  Contents  Loanable Funds

Comments?  Questions?  macro-at-econmodel-dot-com  Copyright 2006 William R. Parke