This study focused on disputes about controls of demographic characteristics among judges, in the examination of empirical theses among master s theses and treatises. In particular, one argument that demographic characteristics are nominal or ordinal variables, so they should be turned into dummy variables and the other one that although they are nominal or ordinal ones, they can be input as it is, only for generalization among responders, not for a specific comparison are chaotic issues so far for researchers and students with academic degrees. In order to resolve this problem, this study acquired demographic characteristics from 14 master s theses and publicized treatises by gaining researcher s approval, and compared standardized and non-standardized coefficients by using a paired t-test, when they were not controlled, when they were controlled by turning them into dummy variables and when they were controlled by inputting nominal ones as they are. The findings show that it is desirable to control demographic characteristics and there are no significant differences, even when they are controlled by inputting nominal ones as they are, not for articulating differences in characteristics. However, it will be necessary to compensate too low number of theses and current approach that is not derived from the perspective of mathematical statistics.