What are farmers really planting? Measuring the presence and effectiveness of Bt cotton in Pakistan
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D. Spielman | Shaukat Ali | A. Khan | G. Ali | P. Zambrano | H. Nazli | Fatima Zaidi | H. Cheema | A. Iqbal | R. S. A. Khan | M. Zia
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D. Spielman | Shaukat Ali | A. Khan | G. Ali | P. Zambrano | H. Nazli | Fatima Zaidi | H. Cheema | A. Iqbal | R. S. A. Khan | M. Zia