1. What are the two hypotheses re: the relation between gun ownership and crime? Gun ownership leads to increases in crime by facilitating crime Gun ownership leads to decreases in crime because it deters it due to the implied possibility of revenge Guns & Crime Article

2. What are different ways to measure gun ownership? Gun ownership legislation Handgun magazine sales (county and state level) Number of gun shows Guns & Crime Article

3. Experimental test of the hypotheses Increases in gun ownership leads to increases in crime in the following year, whereas an increase in crime does not lead to an increase in gun ownership in the subsequent year Burglary and larceny rates rose following growth in gun ownership whereas rates of robbery, assault, rape & car theft did not Passage of gun laws were not accompanied by changes in gun ownership in the following year For counties with high gun ownership, passage of gun laws were not accompanied by changes in crime Guns & Crime Article

4. Correlational test of the hypotheses Relation between magazine sales and gun-related deaths Comparison of the correlation between magazine sales and non-gun homicides and the correlation between magazine sales and gun-related homicides Guns & Crime Article