Being poor brings many disadvantages. A lack of money squeezes options and reduces opportunity. It hampers health and makes ambition harder. But the effects aren’t just direct and physical. They are psychological too. Researchers are beginning to uncover just how debilitating being poor is for effective thinking.

The answer to the question posed in the title Do Financial Concerns Make Workers Less Productive? was a resounding yes. Not only did poor workers whose money troubles were temporarily alleviated produce more, they also made fewer mistakes in production, despite operating more quickly. There is a clear business productivity benefit from this poverty alleviation; and in work that pays piece rates – where workers are paid for their useful output in numbers of products – this alleviation of worry also enabled them to earn more.

In a world of unfairness in which many are kept poor, these are significant findings. In a world seeking greater growth, where growth has been held back by stagnant productivity, they are still more important.

The increase in productivity shown was much greater than that brought about by an increase in the piece rate paid (which in a control experiment was done alongside a cut in base pay so that overall earnings were steady). There was a small increase in output following the piece rate increase, but it was less than a tenth of the change brought about by removing money worries – and there was no discernable increase in the quality of production, meaning this piece rate change delivered much less than a twentieth of the improvement in productivity that alleviating poverty did.

It’s worth noting that the researchers were able to discard alternative explanations of why these workers become more productive. In particular, they specifically discounted the possibility that improved nutrition of the poverty-relieved workers was the cause, because of the speed of the effect of the early payments and the lack of difference in nutritional intake in that short period. The effect is a psychological one: workers who don’t need to worry constantly about money are more productive.

This means that our economies are being held back by workers who are less productive than they could be, simply because they do worry about money on an ongoing basis. GDP growth is being artificially depressed and poverty alleviation could help it recover. This represents a business, investment and economic opportunity.

These findings are depressing. But it’s worse to find that growing up in poverty also has debilitating effects on children.

A recent study finds that poor students underperform their usual standard on maths tests that use real-world scenarios involving money, food or social interactions. It’s not a small effect, either: their performance is on average 18% lower than it is on questions overall – and, the researchers note, it would look even worse if they compared performance against just those questions that are more neutral.

These results were surprising to the researchers, who were expecting to see outperformance in these more practical questions, revealing hidden talent among poor students (they use the jargon low SES, socioeconomic status) that may be untapped by traditional education. That’s the reason why such questions have increasingly been used in modern testing: they are thought to be more accessible to all students. But the result of this study indicates that accessibility comes at the price of triggering distracting thoughts for poorer young people. As the chart shows, performance is worst with regard to questions that refer to money specifically.

Another recent study also found evidence of underperformance on money-linked questions by poor students. It puts this down to ‘attention capture’ as the researcher identified an effect not only on the specifically money-linked questions but also underperformance on more neutral questions asked subsequent to them. It seems as though the question reminds the students to worry about money, and they then can’t shake off the concerns.

These results amount to another example of apparent meritocracy in fact acting to limit the opportunity of those who start with less. As the Fictional Money, Real Costs paper states:

“Examinations are an efficient mechanism to benchmark and rank a population based on a specific set of skills. The notion that they are fair, however, has increasingly been questioned. A significant concern is that performance differences reflect inequities in the testing process itself, rather than differences in underlying skills, and thus may contribute to the intergenerational transmission of existing inequality.”

See also: Meritocracy’s unfair
Business and investment’s fairness challenge – and opportunity

I am happy to confirm as ever that the Sense of Fairness blog is a purely personal endeavour

Do Financial Concerns Make Workers Less Productive?, Supreet Kaur, Sendhil Mullainathan, Suanna Oh, Frank Schilbach, National Bureau Of Economic Research Working Paper 28338, January 2021

Math items about real-world content lower test-scores of students from families with low socioeconomic status, Marjolein Muskens, Willem Frankenhuis, Lex Borghans, npj Science of Learning, vol 9, art 19 (2024)

Fictional Money, Real Costs: Impacts of Financial Salience on Disadvantaged Students, Claire Duquennois, American Economic Review 2022, 112(3): 798–826