I think the value function from Prospect Theory would be a good addition:

(Wrote a recent post that touched briefly on Prospect Theory and couldn't find any R packages for making a quick example chart...)

I'm not sure if this is possible but I think it's closely related to #1 (comment).

Having Edgeworth will be nice. Thanks for the package and your efforts.

In the standard model the labor supply curve can be backward bending if the income effect dominates the substitution effect. Essentially this looks like a parabola with respect to the y axis, but determining the exact shape would depend on the particular maximization problem.

Hello. Thanks for this incredible library!
Here's a suggestion: tax_graph() only allows for supply taxes. For didactic purposes, it should also allow for demand taxes, to show this:

Thanks!

Hi, I'd appreciate if this package had an option for infinitely elastic or inelastic supply and demand curves.

Hello, your initiative is excellent.

It would be possible to add that a basic graph could be added that joins the budget constraint with the indifference curve.

Thanks.

Hello again. A second suggestion. tax_graph() doesn't allow supply_fun to be modified by a negative number (ie a subsidy). It'd be great if you could extend the function to incorporate subsidies!

Thanks!!

To fix, replace at line 82 in the demand.R file with this
if(type == "line") { curve <- data.frame(x = c(xmax, 0.9), y = c(0.9, ymax)) m <- TRUE }

Thanks for your work on this project -- I really like it!

I love this package and I thank you very much for it. However, I am unable to pass a data.frame to supply() and demand() to override the sample curves. When I try to do so I receive this error:

Error in `geom_line()`:
! Problem while computing aesthetics.
ℹ Error occurred in the 1st layer.
Caused by error in `FUN()`:
! object 'y' not found

Note that the same is not true for sdcurve(): passing a data.frame with x and y columns works perfectly there.

It would be awesome if you could write an example on how to achieve the desired behavior in supply() and demand().

I'd like for the satiation indifference curves and central bank preferences of inflation and output to be able to be plotted with this package. Like the image below

Mind that the indifference curves don't need to be circles, they can be horizontal or vertical ellipses as well.

Thank you!