Figure B.3: Learning advancement difference heterogeneity regarding parental education (Middle=ref.) throughout primary education. Note. The graph shows coefficients and 95% confidence intervals of the OLS and IV regressions of sixth-grade skill scores on skill scores of first to fifth grade. In these regressions, we control for parental education, sex, migration background, household type, family size, grade retention, and a covid dummy. We also include school and year FE. The shown coefficients are those of parental education. ***p< .01, **p< .05, *p< .1. 211
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