1. (20 points) Cities often want to determine how much additional law enforcement will decrease their...
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1. (20 points) Cities often want to determine how much additional law enforcement will decrease their murder rates. A simple model with cross-section data at the provincial level to address this question is murdpe= 8o+Bipolpe + Bainepe + Baputy + u (1) where murdpe is murders per capita, polpe is number of police officers per capita, incpe is income per capita and puty is the percent of people in the city that are below a poverty line. Assume that polpc is endogenous, due to possible simultaneity, while the others explanatory variables are exogenous. a. (3 points) What would economic theory suggest for the signs of 8₁, 82 and 33? What type of decision maker would be described by the previous structural equation? (Hint: consider potential criminals and city officials as possible decision makers) b. (3 points) Why would there be simultaneity between polpc and murdpe? Explain. c. (3 points) Suppose that the supply of polpe is a function of murdpc described by the following equation polpe= 60 +61 murdpc +62incpc + d3staz + v (2) where star is the percent of sales tax in the province in which the city is located. Assume murdpe is endogenous while incpc and staz are exogenous variables. What sign would economic theory suggest for 81, 82 and 83? What type of decision maker would be described by the previous equation? (Hint: consider potential criminals and city officials as possible decision makers) Explain. d. (6 points) Consider equations (1) and (2) as a SEM. What assumptions are needed to identify 8, and 6₁? (Hint: think about assumptions required for puty and star to be valid IVs). Explain. f. (5 points) What would be the reduced form equations for the SEM? In these equations what would be the condition that is required for the corresponding IVs to be valid? Explain. 1. (20 points) Cities often want to determine how much additional law enforcement will decrease their murder rates. A simple model with cross-section data at the provincial level to address this question is murdpe= 8o+Bipolpe + Bainepe + Baputy + u (1) where murdpe is murders per capita, polpe is number of police officers per capita, incpe is income per capita and puty is the percent of people in the city that are below a poverty line. Assume that polpc is endogenous, due to possible simultaneity, while the others explanatory variables are exogenous. a. (3 points) What would economic theory suggest for the signs of 8₁, 82 and 33? What type of decision maker would be described by the previous structural equation? (Hint: consider potential criminals and city officials as possible decision makers) b. (3 points) Why would there be simultaneity between polpc and murdpe? Explain. c. (3 points) Suppose that the supply of polpe is a function of murdpc described by the following equation polpe= 60 +61 murdpc +62incpc + d3staz + v (2) where star is the percent of sales tax in the province in which the city is located. Assume murdpe is endogenous while incpc and staz are exogenous variables. What sign would economic theory suggest for 81, 82 and 83? What type of decision maker would be described by the previous equation? (Hint: consider potential criminals and city officials as possible decision makers) Explain. d. (6 points) Consider equations (1) and (2) as a SEM. What assumptions are needed to identify 8, and 6₁? (Hint: think about assumptions required for puty and star to be valid IVs). Explain. f. (5 points) What would be the reduced form equations for the SEM? In these equations what would be the condition that is required for the corresponding IVs to be valid? Explain.
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a Economic theory would suggest a negative sign for Bpolpe since an increase ... View the full answer
Related Book For
Management Science The Art of Modeling with Spreadsheets
ISBN: 978-1118582695
4th edition
Authors: Stephen G. Powell, Kenneth R. Baker
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