For instance, while in most empirical studies characteristics of an employee’s current workplace (such as plant size) are found to be significant determinants of membership, employees may have changed workplaces over their working life so that the current workplace (at the time of the interview) may not have such a good explanatory power for the (past) ‘never-membership’ decision.
exploredata-ZA3700_VarV519 exploredata-ZA3700_VarV517