The work of development economists is sometimes compared to that of a doctor. This is because it is like writing a "prescription" for poverty reduction. Indeed, the process of listening to farmers (i.e., interviewing), conducting surveys (i.e., medical examination), and suggesting ways to improve their lives (i.e., writing prescriptions) may be similar to the work of a doctor. However, farmers do not come to us for consultation (=see the doctor). I would like to talk about the deeper reason why we go all the way to the field to listen to the farmers.