Last week I blogged about faked data in household surveys and a neat paper which told us how it might matter for results, but also gave us some tools to find the fakes. This week, I want to focus on one of the tools that that paper used: Benford’s Law.
So there I was, a graduate student doing my PhD fieldwork. In the rather hot office at the University of Ghana, I was going through questionnaire after questionnaire checking for consistency, missed questions and other dimensions of quality. All of a sudden I saw a pattern: in the time allocation questions, men in one village seemed to be doing the exact same things, for the same amount of time, on two very different days of the week.