Restaurants and bars going smokefree. Will the state make it official?
Every so often I get assigned to teach an "Applicable Math
for Business and Social Sciences" course. (It's not a course
we fight over, but I kind of like teaching it, even though I
have to relearn, each time, terms like "marginal cost".)
The math is pretty simple. The price-demand functions are
linear and so the profit function is an upside-down parabola.
If we can get these business majors to understand that
upside-down parabola, we've won.
So I draw the St. Louis Arch. The left foot is the proft
you get if you charge just enough per item to cover your
costs. Then as you raise the price, you move right and
your profit goes up. For a while. Then it starts going
down. At some point, you hit the right foot, and that's
when you're charging so much that you sell only enough
items to cover your cost again. If you raise some more,
then you start losing money.
If you're charging $1000 for a glass of lemonade, you're
going to lose money.
This point happens even sooner if you're foolish enough to
drive people to the black market. Raising sin taxes not
only brings in less money, it provides another revenue stream
for your favorite scary gang.
It surprises me that so many people think that economic
curves are straight lines, when everything on the planet
is curvy or even fractal. "We'll just raise the taxes..."
Cripes.
B.
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Cheerfully resisting change since 1959.
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