Three Essays on Consumer Behavior and Health Outcomes: An Economic Analysis of the Influence of Nutrition Information and Knowledge on Food Purchasing Behavior and the Impacts of Primary Care Giversâ Parenting on Childhood Obesity

Abstract

This dissertation is comprised of three essays that investigate consumer behavior and health outcomes. The first essay uses experimental economic techniques to explore consumersâ preferences and willingness to pay (WTP) for nutritionally differentiated grass-fed beef. Our findings suggest that consumersâ nutrition knowledge about the functions of Vitamin A, Vitamin E, CLA, and Omega 3 could positively affect their WTP for grass-fed beef while the knowledge about the main food sources of these nutrients negatively affects their WTP for grass-fed beef. Furthermore, a higher sensory evaluation score of grass-fed beef compared to conventional beef will lead to a higher probability for a consumer to choose grass-fed beef and a higher monetary value she/he is willing to pay for grass-fed beef.

Using the same experimental data collected in the first study, the second essay investigates the impacts of consumersâ nutrition knowledge on their WTP by accommodating the potential endogeneity problem using an instrumental variable approach and a non-instrumental variable approach. Our results suggest the existence of the endogeneity of nutrition knowledge and indicate that ignoring the endogeneity problem in econometric modeling will downwardly bias the estimates of the true effects of nutrition knowledge. The estimates obtained from different estimation strategies in the study indicate the robustness of our findings about the effects of nutrition knowledge on consumersâ food purchasing behavior.

The third essay investigates the impacts of primary care giver (PCG)â s time allocation patterns and household food expenditure choices on childhood obesity using the national panel study of income dynamics data. Our results do not suggest significant impacts of PCGâ s labor force participation, involvement in childrenâ s outdoor activity, and household food expenditures on childrenâ s Body Mass Index (BMI). However, the estimates from iterated seemingly unrelated regression (SUR) and semi-parametric polynomial estimation indicate that parentsâ BMI significantly influence childrenâ s BMI. Interestingly, physical activity appears to have weak correlation with childrenâ s BMI.