The Law that Rules is the article written by Steven Rosen and posted in “kansascity dot com” on March 27, 2005. Steven Rosen once a month offers basic economic concepts that can be easily explained to kids, so they can form their vision of how the real-adult world works. This time Rosen’s ninth installment (that is the way he calls his articles; altogether there will be twelve installments) explained the basic rule of economics: the rule of supply and demand. He explains the law of supply and demand using dolls, stuffed animals, trading cards,...