Answer to Question 1
A change in demand means the demand curve has shifted. This is caused by a change in any variable other than price that can influence the market demand of the good in question. A change in quantity demanded refers to a movement along the demand curve and this is caused by a change in the price of the good in question.
Answer to Question 2
On the face of it, providing incentives to police officers to make more arrests sounds like a good idea. Motivated by higher wages, police officers are likely to work harder and to increase the number of arrests they make. However, since they earn higher wages simply based on the number of arrests they make, it is entirely possible that a good number of these arrests may not be warranted and would have been made only to earn higher wages.
The difference between a human and an ape.
Desertification and Climate Change
Demographic change and the effect on people social, and economic life
Ecological sensitivity to climate change
Climate change occurs over millions of years
During a period of high power demand, the voltage output of the power company is reduced by ...