Cautionary notes on the use of field experiments to address policy issues
指出田野实验在政策圈再度流行，但不同类型实验各有优劣，且存在过度炒作，呼吁更平衡地使用田野实验方法。
Field experiments are popular again in policy circles. There are various types of field experiments, with complementary strengths and weaknesses for different policy questions. There is also a lot of needless hype about what field experiments can do. More balance in our use of field experiments is called for.