If you're the primary earner in a family, suffer from a lack access to
a generous rich uncle who's always begging to give you money, or work in a job that's 100 % commission based, you'll want to keep considerably more on hand — say, six or even eight months of living expenses.
Thinking that Bailey did not control for the income level of the
uncles surveyed —
richer uncles tend to be more
generous — Qazi Rahman, a professor of psychobiology at the University of East London, tried to replicate the study in England.