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Convergence in U.S. Productivity Growth for Agriculture

其他書名	Implications of Interstate Research Spillovers for Funding Agricultural Research
出版	SSRN, 2015
URL	http://books.google.com.hk/books?id=Is_jzwEACAAJ&hl=&source=gbs_api

註釋State crop, livestock, and aggregate agricultural total factor productivity (TFP) data, 1950-82, are examined for evidence of convergence to a single TFP level (sigma-convergence) or to a steady state rate of conditional convergence). Our empirical results do not support sigma-convergence but do support beta-convergence. The rate of beta-convergence is variable and depends on research and development R&D) spillins from other states, private R&D, and farmers' schooling. The finding of strong positive interstate spillover effects implies that independent state planning of agricultural research is inefficient and cooperation across states boundaries including establishment of new political jurisdictions for financing public agricultural research can enhance efficiency.