Agricultural R&D Agricultural research Agriculture California Conceptual frameworks Cooperative extension Dissemination of knowledge Economics Environmental pollutions Environmental sector Externalities Full time equivalents Infrastructure development Investments Knowledge based systems Knowledge production function Lead removal (water treatment) Optimal allocation Quality management Quantity–quality management Research infrastructure Social planner Social planners Treated wastewater reuse United States University of California University of California Cooperative Extension Wages Wastewater disposal Wastewater reclamation