We use the classical model, a method for structured expert judgment (SEJ), to study the effects of breastfeeding on IQ. Data on the link between breastfeeding and IQ are available, e.g., the US National Longitudinal Study of Youth, however, questions about data quality and confounding mean...

This book is an extensive survey and critical examination of the literature on the use of expert opinion in scientific inquiry and policy making. The elicitation, representation, and use of expert opinion is increasingly important for two reasons: advancing technology leads to more and more...

Policymakers considering interventions that improve cognitive performance (IQ) need estimates of the value of IQ improvements. Using the classical model of structured expert judgment, we develop estimates of the percentage increase in earned income from interventions to increase IQ in India. Our...