They argue that lack of control does not only stem from jobs with low income, but that "minority status also lowers the sense of control, partly because of lower education, income, and unemployment, and partly because any given level of achievement requires greater effort and provides fewer opportunities". The arguments posed in their book support social causation since such high stress levels are involved. Although both models can be existing, they do not need to be mutually exclusive, researchers tend to agree that downward drift has more relevance to someone diagnosed with schizophrenia.
