Ranking information is often provided to improve task performance, yet its welfare and spillover effects are rarely measured. We measure these effects in a controlled laboratory experiment, in which participants conduct a simple cognitive task and report their willingness-to-pay (WTP) to receive...

Reported rates of return to agricultural R&D are generally high, but they are likely to be biased, particularly because of attribution problems - mismatching research benefits with costs. The importance of attribution biases is illustrated here with new evidence for Brazil. During 1981-2003,...