Use the data for the year 1993 for this question, although you will need to first obtain the lagged murder rate, say mrdrte v
(i) Run the regression of mrdrte on exec, unem. What are the coefficient and t statistic on exec? Does this regression provide any evidence for a deterrent effect of capital punishment?
(ii) How many executions are reported for Texas during 1993? (Actually, this is the sum of executions for the current and past two years.) How does this compare with the other states? Add a dummy variable for Texas to the regression in part (i). Is its t statistic unusually large? From this, does it appear Texas is an "outlier"?
(iii) To the regression in part (i) add the lagged murder rate. What happens to ¡3exec and its statistical significance?
(iv) For the regression in part (iii), does it appear Texas is an outlier? What is the effect on ¡3exec from dropping Texas from the regression?
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