One of the epidemiologists shares with you the results from a study in several Scandinavian countries including Norway, where babies are classied as being Mervr Low Birth Weight if they are born below 1500 gms and given additional nutrition during the first month of life. The following graph and regression table illustrates the main empirical result. The regression specification estimated is y; = a + 5(Birth weight just below 1500;) + yDemographic Controls; + a: The key outcome variable is the 10th grade math score and the units of that variable are in standard deviations relative to the mean. So, a score of 0.1 indicates that the person scored 0.1 standard deviations above the mean. Norway Math tenth grade (2 32 weeks) 0.5 1.400 1,450 1.500 1.550 1.600 Birth weight (grams) Birth cohorts 19861993 Norway tenth grade national exam iOO gm window on either side of 500 grants Birth weight