sustainability of these effects is still unclear and debated controversially between biotechnology proponents and critics. We use … unique panel data of 533 cotton farmers, collected in India between 2002 and 2008, to analyze Bt impacts on cotton yield … India. …

supplied. These hypotheses are tested and confirmed with panel data for the case of transgenic cotton in India. Cotton varietal … diversity in India, with of over 90% adoption of transgenic technology, is now at the same level than it was before the …