It appears, according to an article in Miller-McClune, that the likelihood a woman will engage in a bit of over the top impulse spending depends a lot on the rhythms of her monthly "visitor."
The researchers, who are with the University of Hertfordshire, conducted a study of 443 women between the ages of 18 and 50, who were recruited through “an editorial piece in a popular monthly women’s magazine.” After providing information on the length of their menstrual cycle and their last menses, the women filled out a survey regarding their buying habits over the previous week.
Specifically, they rated on a 1-to-5 scale (from strongly agree to strongly disagree) such statements as “In the last seven days, my spending has been out of control,” and “I have bought something I am unlikely to wear or use.”
These reports were matched with where they were on their cycle during the week in question. (Forty-eight percent were premenstrual, 34 percent were menstrual or post-menstrual and 18 percent were mid-cycle).
“Spending was less controlled, more impulsive and more excessive for women … the further on they were in their cycle,” the researchers report. Strikingly, almost two-thirds of the premenstrual women reported they had bought something on impulse.