Dear scholars, I have a technical question that needs clarification. As employees and customers are the most participants when it comes to the data collection from the questionnaires related to organizations or companies studies. Therefore, there may be some reasons or justifications for the choice to include both employees and customers in the same sample without employing multi-groups analysis. Besides, I am not sure that employees and customers points of views are homogenous and that both can be considered as part of the same population. So, my question is what are the reasons that justify that the employees and customers sample size (i.e. data collected from the questionnaires) can be combined to form the same population of the study? In the other words, from which extend, employees and customers can be homogenous to form the same population of the study?