“…2 We included a number of potentially important factors as control variables both at the firm level and employee level: organizational formalization, measured with the scale of Jansen, Van Den Bosch and Volberda (2006), because it limits employee autonomy and thus may influence the employee CO-performance relationship; employee job resources, captured by the quality of internal cooperation, because in addition to CO as a crucial job resource for employees (Zablah et al, 2012), the quality of contact to and collaboration with internal partners is an important job resource, which may affect both employee CO and performance (Plouffe et al, 2016); employee job demand, measured with an item based on Dwyer and Ganster (1991), because the demandingness of work-related activities may both directly affect employee CO and performance and influence the employee CO-performance relationship (Zablah et al, 2012); employee job stress, measured as the number of sick days (e.g. Dwyer and Ganster, 1991), because stress may negatively affect both employee CO and performance (Zablah et al, 2012); employee job engagement, measured with an item based on Rich, Lepine and Crawford (2010), because this positive, work-related affective-motivational state of mind may increase 542 D. Herhausen, L. M. De Luca and M. Weibel both employee CO and performance (Zablah et al, 2012); and co-worker CO because the CO of other employees may increase employee performance (Menguc et al, 2016). In addition, we control for number of employees, turnover in the previous year, and employee gender, age, education and tenure.…”