Is livestock research unproductive?: Separating health maintenance from improvement research
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- Zvi Griliches, 1958. "Research Costs and Social Returns: Hybrid Corn and Related Innovations," Journal of Political Economy, University of Chicago Press, vol. 66, pages 419.
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- Thirtle, Colin G. & Townsend, Rob F. & Amadi, Juliana & Lusigi, Angela & van Zyl, Johan, 1998. "The Rate Of Return On Expenditures Of The South African Agricultural Research Council (Arc)," Agrekon, Agricultural Economics Association of South Africa (AEASA), vol. 37(4), December.
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- D. Hallam, 1990. "Agricultural Research Expenditures And Agricultural Productivity Change," Journal of Agricultural Economics, Wiley Blackwell, vol. 41(3), pages 434-439.
- Young, Douglas L. & Haantuba, Hyde H., 1998. "An Economic Threshold For Tick Control Considering Multiple Damages And Probability-Based Damage Functions," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 23(02), December.
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