This paper examines the intensity of moonlighting among highly educated Greeks using a unique dataset of about 400 moonlighters in tertiary distance learning. We distinguish between higher-intensity and lower-intensity moon lighters taking into consideration observed and unobserved heterogeneity between the two groups. Our findings suggest that both demographic and work-related characteristics drive the number of “extra” jobs one may hold. However, when we split the sample into low- and high-intensity moonlighters, an asymmetry appears in the driving forces of each group’s behaviour. For lower-intensity moonlighters, family and monetary characteristics are the decisive factors of their behaviour, while for higher-intensity moonlighters, work experience appears to be the main driver. Our findings suggest that moonlighters in tertiary education are not a unified group of employees. Therefore, institutions and organizations employing moonlighters should in principle be able to distinguish between the different groups of moonlighters and exercise different selection criteria. If the purpose is to recruit top-notch moonlighters serving teaching needs in cutting-edge technology, e.g. IT specialists, mole cular biologists, banking sector executives and managers, then the selection criteria should be in favor of past and current work experience. However, if the purpose is to recruit moonlighters serving teaching needs in non-cutting-edge technology, then family and monetary criteria should be adopted in the selection process.
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