The purpose of this paper is to analyze the effects of public investment in agricultural R&D and extension on broadacre farming productivity in Australia.
An autoregressive integrated moving average (ARIMA) regression model is applied to estimate the effects of public investment in agricultural R&D and extension on Australian braodacre productivity.
The study reveals that public investment in agricultural R&D and extension has contributed almost two-thirds of average annual broadacre productivity growth between 1952-1953 and 2006-2007, the average internal rate of return to public investment in agricultural R&D and extension was 28.4 and 47.5 per cent a year, respectively, and overseas spill-ins is an important source of domestic agricultural productivity growth.
Policy implications: the findings suggest that increasing public investment in agricultural R&D and extension and maintaining agricultural R&D policy stability are equally important to have a sustained long-term agricultural productivity growth, and maintaining an open trade and investment regime is important to benefit from foreign knowledge spillovers which is especially important for developing countries.
This paper contributes to the existing literature by employing more sophisticated econometric techniques with an extended data set for the period from 1952-1953 to 2006-2007. The study separates the contribution of public R&D investment and the extension investment, and also takes into account the contribution of overseas public investment on the TFP growth in the Australian broadacre sector.
JEL Classification – D24, N57, O32
The authors would like to thank John Mullen (from the Charles Sturt University) for his contribution and valuable comments in preparing this paper. The authors also would like to thank the two anonymous referees for their valuable comments and suggestions on the paper.
Zhang, D., Chen, C. and Sheng, Y. (2015), "Public investment in agricultural R&D and extension: An analysis of the effects on Australian broadacre farming productivity", China Agricultural Economic Review, Vol. 7 No. 1, pp. 86-101. https://doi.org/10.1108/CAER-05-2014-0052
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