log (?ent)?=−0.569+0.262?90+0.041log(pop)+0.571log(avginc)+0.0050pctstu se=               (0.535) (0.035)      (0.023)                  (0.053)           (0.0010) ?squared=0.861 ?=128  where pop is city population, avginc is average income, and pctstu is student population as a percentage of city population (during the school year).  The data for the years 1980 and 1990 include rental prices and other variables for college towns. The idea is to see whether a stronger presence of students affects rental rates  What is the made of the estimate on the 1990 dummy variable and the relationship between rent and the student population

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