<span>Corelation does not determine causation. Several factors play into murder rates and overall crime rates that effect them. In traditional experimentation you change one thing as the variable and keep all other factors constant. In society we do not have the luxury of being able to change only obe variable. Also, a study of potential nation wide policy toward combating a problem should include more than just five data points.</span>
Cost-Low structure
Benefit- Most needed
Spain, Portugal, Ireland, Iceland. Those are the only ones I can think of
The correct answer is <em>The Chicago School </em>which was the first school of sociology and criminology in the US, established at the University of Chicago in the 19th century.