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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
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