Found this on the Magpi:
The case of the disappearing teaspoons: longitudinal cohort study of the displacement of teaspoons in an Australian research institute.From the introduction:
In January 2004 the authors found their tearoom bereft of teaspoons. Although a flunky (MSCL) was rapidly dispatched to purchase a new batch, these replacements in turn disappeared within a few months. Exasperated by our consequent inability to stir in our sugar and to accurately dispense instant coffee, we decided to respond in time honoured epidemiologists' fashion and measure the phenomenon.
A search of the medical and other scientific literature through Google, Google Scholar, and Medline using the keywords "teaspoon", "spoon", "workplace", "loss" and "attrition" revealed nothing about the phenomenon of teaspoon loss. Lacking any guidance from previous researchers, we set out to answer the age old question "Where have all the bloody teaspoons gone?" We aimed to determine the overall rate of loss of teaspoons and the half life of teaspoons in our institute, whether teaspoons placed in communal tearooms were lost at a different rate from teaspoons placed in individual tearooms, and whether better quality teaspoons would be more attractive to spoon shifters or be more highly valued and respected and therefore move and disappear more slowly.
You can also get the whole thing as a PDF file and it's jolly funny! I have a mismatched assortment of teaspoons at home, including one prized TWA metal spoon. I think the American Airlines spoon went walkabout...