The following links are to various applets I have developed
for economics and econometrics classes. More should appear in the
near future. If you are an instructor and you would like to use
any of them for a class, you are invited to do so. If you do, I only
ask that you:
(1) include the appropriate attribution. Some applets have an
information button. In such cases, provision of a fully operational
applet is sufficient. If the applet does not include an information
button, please include the following statement (or its informational
equivalent) somewhere in the surrounding html: "This applet
written by Geoffrey Gerdes."
(2) tell me you are using it. Suggestions to improve the applets are
encouraged as well.
Please send an e-mail to firstname.lastname@example.org. I hope you enjoy them!
Ready for use
2D Function Studio
This applet is nearing completion. It is being designed to help illustrate
the behavior of functions as parameters are adjusted.
- An Edgeworth Box This applet depicts
exchange between two Cobb-Douglas utility maximizers. The utility
functions and endowments of each player can be adjusted, and the set
of individually rational, pareto improving points shared by the
players, the core, the contract curve, and the Walrasian equilibrium
with the associated price line may be depicted for any number of
with Linear Demand Helps the student to explore the variation
of elasticity over the range of price/quantity combinations for a
linear demand curve, and the implications for the total revenue of a
monopolist. Students can vary prices and quantities by dragging
sliders, and can change the parameter values of the demand
- Student's t
Distribution Displays the shape of the 't' distribution
superimposed on the normal distribution. A slider is used to allow
the variation of degrees of freedom and view resulting change in
shape. The 5% critical values of a two-tailed test for both
distributions is displayed.
- The F Distribution Same as the
't' applet, but two degrees of freedom sliders, one for the numerator
and one for the denominator.
Working demo, but not finished for various reasons