This is economics 101. The law of Supply and Demand. http://en.wikipedia.org/wiki/Supply_and_demand http://en.wikipedia.org/wiki/Supply_and_demand The four ba

This is economics 101. The law of Supply and Demand. http://en.wikipedia.org/wiki/Supply_and_demand http://en.wikipedia.org/wiki/Supply_and_demand The four basic laws of supply and demand are: 1. If demand increases and supply remains unchanged, a shortage occurs, leading to a higher equilibrium price. 2. If demand decreases and supply remains unchanged, a surplus occurs, leading to a lower equilibrium price. 3. If demand remains unchanged and supply increases, a surplus occurs, leading to a lower equilibrium price. 4. If demand remains unchanged and supply decreases, a shortage occurs, leading to a higher equilibrium price.