Plain Sense Economics

The Freakonomics blog (click the title of this post for a link to the specific article) recently ran a contest for economics haiku. The six finalists were:
No. 1, posted by Tim:
Demand curve slopes downBecause the more cake I eat,The less cake I want.

No. 2, posted by Calum:
A friend and I, jailed;We agreed to [...]

When we tackle the demand curve and the various determinants of demand, one of the influences we discuss is that of income. In a normal good, when income goes up demand for that good goes up. So demand for dinners at nice restaurants would be expected to rise as the economy (and people’s incomes) rises.
There [...]