My favorite part of the paper that used field experiments to demonstrate that rice in Hunan is a Giffen good for the poorest consumers [0] is the cheeky inclusion of this quote from George Stigler:
> Perhaps as persuasive a proof [of the “Law of Demand”] as is readily summarized is this: if an economist were to demonstrate its failure in a particular market at a particular time, he would be assured of immortality, professionally speaking, and rapid promotion while still alive. Since most economists would not dislike either reward, we may assume that the total absence of exceptions is not from lack of trying to find them.
> Perhaps as persuasive a proof [of the “Law of Demand”] as is readily summarized is this: if an economist were to demonstrate its failure in a particular market at a particular time, he would be assured of immortality, professionally speaking, and rapid promotion while still alive. Since most economists would not dislike either reward, we may assume that the total absence of exceptions is not from lack of trying to find them.
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2964162/