It asked women to complete an online questionnaire that asked what percentage of household spending they control or influence.

WSJ: Who Makes the Call at the Mall, Men or Women?

The latest study looked at 255 women with breast cancer and compared their answers in a questionnaire on mental outlook and life events with 367 healthy control subjects.

BBC: Positive thinkers 'avoid cancer'

Their subjects were asked to rate such things as their tendency to correct others, to want to control conversations, and to surpass others' accomplishments, in a questionnaire designed to assess their dominance.

ECONOMIST: Odour and mating preferences