Behind the Supply Curve
In examining the forces operating on supply, the
fundamental point to grasp about businesses, 
is that producers supply supply behavior
commodities for profit and not for fun or charity. 
 For example, a farmer will supply more cotton
at higher cotton prices because it is profitable to 
conversely, when the corn price falls below ;do so
production, as it did in the mid-1980s, the cost of
crops, let the fields go to farmers plant other
seed, or even sell their farms.