“To prevent spending more than planned, we recommend consumers carry cash instead of cards whenever they can, as it acts as a self-control method,” says marketing researcher Lachlan Schomburgk from the University of Adelaide. “When using cash, people physically count and hand over notes and coins, making the act of spending more
salient
. If nothing is physically handed over, it’s easy to lose track of how much is spent.” The difference in spending was “small, but significant” the researchers say. It was greater for “
conspicuous consumption
” spending, which is buying items that signal status – so luxury clothing and jewelry, for example.