Todd, P. E. and K. I. Wolpin (2007, Winter). The production of cognitive achievement
in children: Home, school, and racial test score gaps. Journal of Human Capital 1 (1),
91-136.
Watson, M. W. and R. F. Engle (1983, December). Alternative algorithms for the esti-
mation of dynamic factor, mimic and varying coefficient regression models. Journal of
Econometrics 23 (3), 385-400.
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