part a only. first stage: X = reduced form: Y = 3. [20pts] The following is the abridged abstract from the 2018 IZA Discussion Paper "The Effect of Media Coverage on Mass Shootings," by...
3. [20pts] The following is the abridged abstract from the 2018 IZA Discussion Paper "The Effect of Media Coverage on Mass Shootings," by Jetter & Walker.v [Emphasis added by me.] Can media coverage of shooters encourage future mass shootings? We explore the link between the prime time television news coverage of shootings and subsequent mass shootings in the US from January 1, 2013 to June 23, 2016. To circumvent endogeneity concerns, we employ an instrumental variable strategy worldwide disaster deaths provide an exogenous variation in news coverage that systematically crowds out shooting-related coverage. Our findings consistently suggest a positive and statistically significant effect of coverage on the number of subsequent shootings. To summarize, the authors are trying to see how the amount of media coverage affects the number of mass shootings during a certain time period. To do so, they use th number of natural disaster deaths during that same period as an instrument for the amount of media coverage. [11pts] Based on the following variable definitions, write out the reduced form and first stage equations that would need to be estimated in order to calculate the IV estimate of the effect of media coverage on subsequent shootings. Write down the IV estimate as a function of the reduced form parameter estimates. A. num number of mass shootings in the week after mass shooting i hrsi hours of media coverage in the week after shooting i number of natural disaster deaths in the week after shooting i deaths [4pts] Explain the exclusion restriction needed for the IV analysis in part (A) to be internally consistent. Explain in words and one equation. B.
3. [20pts] The following is the abridged abstract from the 2018 IZA Discussion Paper "The Effect of Media Coverage on Mass Shootings," by Jetter & Walker.v [Emphasis added by me.] Can media coverage of shooters encourage future mass shootings? We explore the link between the prime time television news coverage of shootings and subsequent mass shootings in the US from January 1, 2013 to June 23, 2016. To circumvent endogeneity concerns, we employ an instrumental variable strategy worldwide disaster deaths provide an exogenous variation in news coverage that systematically crowds out shooting-related coverage. Our findings consistently suggest a positive and statistically significant effect of coverage on the number of subsequent shootings. To summarize, the authors are trying to see how the amount of media coverage affects the number of mass shootings during a certain time period. To do so, they use th number of natural disaster deaths during that same period as an instrument for the amount of media coverage. [11pts] Based on the following variable definitions, write out the reduced form and first stage equations that would need to be estimated in order to calculate the IV estimate of the effect of media coverage on subsequent shootings. Write down the IV estimate as a function of the reduced form parameter estimates. A. num number of mass shootings in the week after mass shooting i hrsi hours of media coverage in the week after shooting i number of natural disaster deaths in the week after shooting i deaths [4pts] Explain the exclusion restriction needed for the IV analysis in part (A) to be internally consistent. Explain in words and one equation. B.