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Table 7 Tracking variable: number of years since tracking

From: Does early tracking affect learning inequalities? Revisiting difference-in-differences modeling strategies with international assessments

  Inequality measure
Family background inequalities Overall inequalities
F-gap SD
(1) (2) (3) (4)
Constant 76.71*** 82.05*** 63.32*** 63.60***
No years since tracking 4.00** − 3.86 0.848 0.494
Inequality measure at t = 1 0.538*** 0.473*** 0.438*** 0.434**
No years since tracking inequality measure at t = 1   0.089   0.004
N countries 24 24 24 24
R2 0.503 0.540 0.286 0.287
  1. No years since tracking is defined as (15 − age of tracking) if tracking occurs up to age 15, is equal to  −1 if tracking occurs after age 15 (not yet occurred). Under the heading SD we report results relative to the effects of tracking on the country standard deviation
  2. Under the heading F-gap we report results relative to the effects of tracking on the difference between tertiary educated parents with the largest number of books and no tertiary educated parents with the lowest number of books: F-gap = [ln(500) × \(c_{1}\) + \(c_{2}\)] − ln(5) × \(c_{1}\), where \(c_{1}\) and \(c_{2}\) are the coefficients of the family background variables: ln(books) and tertiary education
  3. Columns (1) and (3) refer to the model with no interaction; columns (2) and (4) to models with interaction between the tracking indicator and inequality at t = 1
  4. *0.05 < p value < 0.10, **0.01 < p value < 0.05, ***p value < 0.01