Transgenic crops, production risk and agrobiodiversity
研究了转基因作物是否导致农业生物多样性丧失，发现转基因棉花在印度普及后，品种多样性并未下降，反而与引入前持平，对政策制定有参考价值。
Do transgenic crops cause agrobiodiversity erosion? We hypothesise that they increase productivity and reduce production risk and may therefore reduce farmers' demand for on-farm varietal diversity, especially when only a few transgenic varieties are available. We also hypothesise that varietal diversity can be preserved when more transgenic varieties are supplied. These hypotheses are tested and confirmed with panel data for the case of transgenic cotton in India. Cotton varietal diversity in India, with over 90 per cent adoption of transgenic technology, is now at the same level than it was before the introduction of this technology. Some policy implications are discussed.