Socio-demographic data. The following socio-demographic data were collected: age, gender (coded as 1 = male and 2 = female), educational level (coded as 1 = primary education, 2 = secondary education, 3 = vocational training, 4 = graduate degree), organizational size (coded from 1 = micro to 4 = large, depending on the number of employees), seniority, and years working with the same leader.