We are going to discuss further the research we saw in Lecture 8 about the effects of attending FIU university for the marginal student from Zimmerman (2014). Admissions probability FIU attendance 35 FIU admission Attendance Probability -2 - 2 GPA distance GPA distance FIG. 4.-Admissions and FIU attendance. Lines are fitted values based on the main specification. Dots, shown every .05 grade points, are rolling averages of val- ues within .05 grade points on either side that have the same value of the threshold- crossing dummy. 2a. Explain what empirical strategy Zimmerman (2014) uses to examine the effects of attending FIU for the marginal student (remember from class and graph above).2b. Zimmerman (2014) also includes the following graph (see below). Explain what it shows and why you think they included it. Four years Five years Six years Degree receipt Degree receipt 2 Degree receipt -2 -1 -2 -2 GPA distance GPA distance GPA distance FIG. 6.-SUS BA receipt by years elapsed since high school. Lines are fitted val- ues based on the main specification. Dots, shown every .05 grade points, are roll- ing averages of values within .05 grade points on either side that have the same value of the threshold-crossing dummy