Dynamic Treatment Effect Analysis of TV Effects on Child Cognitive Development
AbstractWe investigate whether TV watching at ages 6-7 and 8-9 affects cognitive development measured by math and reading scores at ages 8-9 using a rich childhood longitudinal sample from NLSY79. Dynamic panel data models are estimated to handle the unobserved child-specific factor, endogeneity of TV watching, and dynamic nature of the causal relation. A special emphasis is put on the last aspect where TV watching affects cognitive development which in turn affects the future TV watching. When this feedback occurs, it is not straightforward to identify and estimate the TV effect. We adopt estimation methods available in the biostatistics literature which can deal with the feedback feature; we also apply the standard econometric panel data IV approaches. Overall, for math score at ages 8-9, we find that watching TV for more than two hours per day during ages 6-9 has a negative total effect mostly due to a large negative effect of TV watching at the younger ages 6-7. For reading score, there are evidences that TV watching between 2-4 hours per day has a positive effect whereas the effect is negative outside this range. In both cases, however, the effect magnitudes are economically small.
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Bibliographic InfoPaper provided by East Asian Bureau of Economic Research in its series Development Economics Working Papers with number 22445.
Date of creation: Jan 2007
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TV watching; treatment effect; panel data; dynamic model; Granger Causality;
Other versions of this item:
- Fali Huang & Myoung-Jae Lee, 2010. "Dynamic treatment effect analysis of TV effects on child cognitive development," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 25(3), pages 392-419.
- Fali Huang & Myoung-jae Lee, 2007. "Dynamic Treatment Effect Analysis of TV Effects on Child Cognitive Development," Working Papers 10-2007, Singapore Management University, School of Economics.
- Fali Huang & Myoung-jae Lee, 2009. "Dynamic Treatment Effect Analysis of TV Effects on Child Cognitive Development," Discussion Paper Series 0906, Institute of Economic Research, Korea University.
- C33 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Models with Panel Data; Spatio-temporal Models
- I20 - Health, Education, and Welfare - - Education - - - General
- J13 - Labor and Demographic Economics - - Demographic Economics - - - Fertility; Family Planning; Child Care; Children; Youth
- E60 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - General
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