30/05/2026
The phone rang at 4:45 in the morning.
Esther Duflo's first thought was concern. Phones don't ring at that hour with good news.
She answered. The caller told her she had just won the Nobel Memorial Prize in Economic Sciences. There was a pause.
"With whom?"
When they said Abhijit Banerjee and Michael Kremer, she replied, "Oh. Do you want to talk to him?" — and handed the phone to her husband, still waking up beside her.
That moment tells you almost everything you need to know about Esther Duflo.
Born in Paris in 1972, she came to MIT for her PhD in economics in the late 1990s. Her first class in development economics was taught by Banerjee and Kremer — the two men with whom, twenty years later, she would share the Nobel Prize. What began as a student-teacher relationship became one of the most consequential scientific partnerships of the era.
At the time, most economists tackled global poverty with grand theories and sweeping programs. Some succeeded. Many failed. Almost none were properly tested.
Duflo asked a different question: what if instead of arguing ideology, we tested solutions the way doctors test medicine?
She and her colleagues borrowed a tool from clinical science — the randomized controlled trial. One village receives an intervention. Another doesn't. Outcomes are measured carefully. Results are compared. No assumptions. No guesswork. Just evidence.
This approach was radical in economics in the 1990s. Many believed poverty was too complex for such testing. Duflo believed the opposite: that complexity was exactly why careful testing mattered.
The findings overturned comfortable assumptions. Free deworming pills for children increased school attendance more than building new classrooms. Simply giving parents clear information about their children's learning improved outcomes. Microcredit — long celebrated as a transformational solution — turned out not to significantly raise incomes or transform lives the way advocates had claimed.
These results weren't comforting. But they were true.
"Our goal," Duflo said after the Nobel announcement, "is to make sure that the fight against poverty is based on scientific evidence. Too often the poor are reduced to caricatures. Even people who want to help do not always understand what they actually need."
In 2003, she co-founded the Abdul Latif Jameel Poverty Action Lab at MIT — J-PAL — which became a global center for evidence-based policy research. By 2019, it had supported nearly a thousand studies across 84 countries. Policies informed by its work had reached more than 450 million people.
At 46, Duflo became the youngest person ever to win the Nobel Prize in Economics, and only the second woman. She did not frame the win as a personal victory. She framed it as an invitation.
She hoped young women would see economics not as "wearing ties and suits and thinking about the macro economy and finance" — but as a way to understand how children learn, how families make decisions under pressure, how policy can help or harm real human lives.
Esther Duflo did not solve global poverty. She has never claimed to. She would tell you that no single person ever could.
What she proved is something quieter and more lasting: that progress doesn't come from certainty, but from curiosity. That ideology should give way to evidence. That the world's hardest problems become less overwhelming when we stop pretending we already know the answers — and start measuring until we do.
She became the youngest Nobel laureate in economics not by claiming brilliance, but by insisting on humility.
And her first response, when the call came, was still to ask who else deserved the credit.
