ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Evaluating returns to postharvest research and development in the fresh-winter tomato industry.

Ansoanuur, J. S.;

Dissertation Abstracts International. A, Humanities and Social Sciences Year: 1990 Vol: 50 Issue: 7 Pages: p.2169

1990

บทคัดย่อ

A model was formulated for evaluating returns to postharvest research and development (R&D) and preharvest marketing-related R&D. It addressed both the supply and demand impacts of these variables and also the distribution of the benefits to the different economic groups, for the fresh-winter tomato industry. Using a partial equilibrium, simultaneous-equations approach, the following were estimated: a Florida shipping-point supply equation, a Mexican export supply equation and a marketing margin equation for fresh-winter tomatoes. The estimated coefficients were then used to derive supply and demand equations at two levels (grower and retail) in the fresh-winter tomato market. These supply and demand equations were used to derive consumer surplus (CS) and producer surplus (PS) relationships as a function of the preharvest and postharvest R&D expenditures. These CS and PS relationships enabled estimation of the present value of marginal and average rates of return to preharvest and postharvest R& D investments to tomato growers and distributors, to US consumers of fresh-winter tomatoes, and to society as a whole. The results show that expenditures allocated to postharvest activity have a very high rate of return at the margin, and that growers and distributors receive an estimated 33% of the returns while consumers receive 67% of the returns.