the science of scarcity

harvard |  scarcity had stolen more than flesh and muscle. It had captured the starving men’s minds.

Mullainathan is not a psychologist, but he has long been fascinated by how the mind works. As a behavioral economist, he looks at how people’s mental states and social and physical environments affect their economic actions. Research like the Minnesota study raised important questions: What happens to our minds—and our decisions—when we feel we have too little of something? Why, in the face of scarcity, do people so often make seemingly irrational, even counter-productive decisions? 

And if this is true in large populations, why do so few policies and programs take it into account?

In 2008, Mullainathan joined Eldar Shafir, Tod professor of psychology and public affairs at Princeton, to write a book exploring these questions. Scarcity: Why Having Too Little Means So Much (2013) presented years of findings from the fields of psychology and economics, as well as new empirical research of their own. Based on their analysis of the data, they sought to show that, just as food had possessed the minds of the starving volunteers in Minnesota, scarcity steals mental capacity wherever it occurs—from the hungry, to the lonely, to the time-strapped, to the poor.

That’s a phenomenon well-documented by psychologists: if the mind is focused on one thing, other abilities and skills—attention, self-control, and long-term planning—often suffer. Like a computer running multiple programs, Mullainathan and Shafir explain, our mental processors begin to slow down. We don’t lose any inherent capacities, just the ability to access the full complement ordinarily available for use.

But what’s most striking—and in some circles, controversial—about their work is not what they reveal about the effects of scarcity. It’s their assertion that scarcity affects anyone in its grip. Their argument: qualities often considered part of someone’s basic character—impulsive behavior, poor performance in school, poor financial decisions—may in fact be the products of a pervasive feeling of scarcity. And when that feeling is constant, as it is for people mired in poverty, it captures and compromises the mind.

This is one of scarcity’s most insidious effects, they argue: creating mindsets that rarely consider long-term best interests. “To put it bluntly,” says Mullainathan, “if I made you poor tomorrow, you’d probably start behaving in many of the same ways we associate with poor people.” And just like many poor people, he adds, you’d likely get stuck in the scarcity trap.