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Table 2 Standard deviation of family innovations with model comparison

From: The time-varying role of the family in student time use and achievement

  Model  
    Polynomial Lag-mom education  
  Baseline a Baseline of lags b interactions c Sibling-pair
Outcome (SD units) (time units) (SD units) (SD units) observations
Math score 0.170   0.169 0.184 721,443
Reading score 0.188   0.187 0.208 715,210
Homework (h/week) 0.207 0.488 0.206 0.209 505,669
Free reading (h/day) 0.248 0.154 0.248 0.257 504,257
Computer use (days/month) 0.239 1.405 0.235 0.242 504,157
TV watching (h/day) 0.284 0.565 0.282 0.296 266,263
  1. Sources: North Carolina Education Research Data Center and North Carolina State Center for Health Statistics
  2. aRegression estimates for the baseline model are in Table 7 in the Appendix
  3. bModel includes a third-order polynomial of lagged outcome
  4. cModel includes interactions between lagged outcome and five categories of mother’s education