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Short and long-run returns to agricultural R&D in South Africa, or will the real rate of return please stand up.
Schimmelpfennig, D., (2000)
CAUSALITY BETWEEN PRODUCTIVITY AND EXPORTS IN AGRICULTURE: EVIDENCE FROM ASIA AND LATIN AMERICA
Arnade, C., (1995)
Financial constraints and output targets in Russian agricultural production
Arnade, Carlos Anthony, (2000)