“…More recently, Nielsen, Hetland, Matthiesen, and Einarsen (2012) found that workplace bullying leads to psychological distress, which, in turn, can contribute to even more bullying. However, a clear methodological limitation of these studies is that neither Kivimäki et al (2003) nor Nielsen et al (2012) carried out comparisons between causation models. The rest of the longitudinal studies only explored normal cross-lagged effects of bullying and intentions to leave (Berthelsen, Skogstad, Lau, & Einarsen, 2011), sleep problems (Hansen, Hogh, Garde, & Persson, 2013), health (Hoobler, Rospenda, Lemmon, & Rosa, 2010), and mental distress (Finne, Knardahl, & Lau, 2011;Lahelma, Lallukka, Laaksonen, Saastamoinen, & Rahkonen, 2012).…”