“…According to previous research, individuals' demographic characteristics, including age (e.g., Wang et al, 2014), gender (e.g., Duan et al, 2017), education level (e.g., Zhou et al, 2020), and organizational tenure (e.g., Detert and Burris, 2007), have potential impact on their voice behaviors (Bidwell and Briscoe, 2009;Morrison, 2011;Liang et al, 2012). Therefore, we included these control variables to maintain consistency with previous studies with gender as a dummy variable (0 = male; 1 = female) and education level as a categorical variable (1 = high school or below, 2 = technical secondary school, 3 = junior college, 4 = college and above).…”