Early childhood education programs play an important role in child family-to-school transition. In 1998, California voters passed Proposition 10, the California Children and Families Act, which levied a 50-cent tax on each pack of cigarettes and other tobacco products to finance programs for children ages 0-5. In less than two decades, First 5…

This paper illustrates how information collected through interviews can develop a richer understanding of the assignment mechanism, which can result in more plausible causal effect estimates from observational studies and provides a roadmap for sensitivity analysis. Focusing on the issue of assignment to algebra in 8th grade, the author shows how…