Based on this survey, we don't really have the data "to conclude that adult learning (formal or informal) has a causal effect on older workers’ employability." This is partially a problem with the number of the studies, partially a problem with methodology, and partially a proiblem with the mixed results produced by the existing studies. We see this especially in cases where adult learning seems to decrease the chance of getting a job. "There has to be easy access to education and skill upgrading and it must not be too expensive to enrol in courses or classes. Furthermore, there must be ways to finance one's lives while studying."