Complementarity of field studies and RCTs: evidence from Bt eggplant in Bangladesh
通过孟加拉国Bt茄子的实地研究，发现其提高产量、降低成本并增加利润23%，同时验证了随机对照试验的评估结果，并揭示了影响采用的因素。
Abstract Randomised control trials (RCTs) and field studies are two empirical approaches. We conducted a field study analysing the adoption of Bt eggplant in Bangladesh and compared the results of previous RCTs. We find that Bt eggplant raises yields, lowers total cost and pesticide costs and generates a price premium compared to non-Bt eggplant, increasing profits by 23 per cent. We also identify factors contributing to adopting Bt eggplant, including better access to credit, farm sizes and expected profitability. Our low-cost field study confirms the impact assessment results of RCTs and provides insight into factors affecting adoption.