. . "Verkaufsförderung" . . "Agricultural productivity United States." . . "USA" . . "National Institute for Commodity Promotion Research & Evaluation (U.S.)" . . "Agriculture Economic aspects United States." . . "Agrarwissenschaft" . . . . . . . . . . . . . . . . "Distribution of gains from research and promotion in multi-stage production systems : further results"@en . . . . . . . "Kosten-Nutzen-Analyse" . .