In Greece, drivers cannot legally purchase custom vanity plates. However, a new study confirms an open secret: that the country has an illegal market for acquiring license plates with distinctive number patterns, perhaps as a form of "conspicuous corruption." Panos Louridas and Diomidis Spinellis of the Athens University of Economics and Business, Greece, report their findings in the open-access journal PLOS ONE on September 1, 2021.