Besides collecting plot-specific information on inputs and outputs, the survey also contained a number of questions focused on understanding the economic effects of using insect-resistant rice varieties. Farmers recounted the prices paid for all inputs and the prices that they received for their output. All the transactions, except for the provision of the seed to the farmers, were conducted on free markets with no assistance from the research team or local government officials. These data are used mainly to calculate whether or not there were any productivity effects associated with the adoption of GM rice within the sample households.