ECONOMIC DEVELOPMENT IN GREENLAND: A TIME SERIES ANALYSIS OF DEPENDENCY GROWTH , AND INSTABILITY Column A presents the coefficient from a regression of school average scores on an index of student quality, pooling all metropolitan schools in the NELS sample 44 and including a fixed effect for each As in the SAT data, peer effects and effectiveness sorting are together substantial, inflating the school-level background index coefficient by 90 percent relative to the coefficient of a within-school regression of individual scores on own characteristics
