Reciprocity Rules!

This year my husband and I received an adorable, yet mysterious Christmas card. It was signed by a woman neither one of us can remember ever meeting. “So”, my husband said as I placed the card on the bookshelf with all of the others, “Do you think we are subjects in a modern version of that experiment you wrote about?” He was referring to a section of an article I’d published earlier in the year about the notion of reciprocity [...]