Esther Duflo and women in economics

Episode Summary

Executive Summary: The episode explains why Banerjee, Duflo, and Kremer won the Nobel Prize for economics: they pioneered randomized controlled trials in development economics to test what actually improves lives and policies. It also examines economics’ diversity problem, especially the underrepresentation of women, and revisits controversy over a famous Kenya deworming study and the broader challenges of evidence-based aid.

Main Topics: Nobel Prize for randomized trials in development economics (Priority: 5/5): Tim Harford explains that the laureates were honored for promoting experimental methods in economics, especially randomized controlled trials used to test development interventions rigorously. Kenya deworming experiment and impact on schooling (Priority: 5/5): The discussion highlights Michael Kremer’s early Kenya study, where treating children for worms improved attendance and wellbeing at very low cost, becoming a landmark in development economics. Why randomization matters for policy evaluation (Priority: 5/5): Harford argues that simply observing that aid programs correlate with positive outcomes is misleading; random assignment is needed to isolate causal effects and identify what truly works. Economics and the diversity problem (Priority: 4/5): Sarah Smith discusses the lack of women and broader demographic diversity in economics, linking it to the subject’s image problem and the pipeline from school to university and profession. Economics as a policy-relevant discipline (Priority: 4/5): The conversation stresses that greater diversity matters because economists influence public policy, and a narrow profession may produce narrower policy advice. Controversy over deworming evidence and replication (Priority: 4/5): A later segment revisits the Kenya worm trial controversy, contrasting the original findings with a replication study that questioned indirect effects and sparked debate over statistical validity.

Key Arguments: Randomized controlled trials let economists make causal claims rather than relying on misleading correlations. Development aid should be evaluated rigorously because large sums are spent and policymakers need evidence on effectiveness. The Kenya deworming trial was influential because it found a very cheap intervention could improve school attendance and health. Even apparently obvious interventions can fail or succeed in unexpected ways, so intuition is not enough. Economics has a diversity problem at both entry and senior levels, especially for women, and this affects the quality of the discipline. A more diverse economics profession is especially important because economists help shape public policy. Replication and reanalysis are essential, but once an error is found, researchers disagree over how far it invalidates original conclusions.

Data Points: Nobel Prize winners: 3 - Abhijit Banerjee, Esther Duflo, and Michael Kremer shared the prize. Esther Duflo age at win: 46 - Highlighted as notably young for a Nobel economics laureate. Girls taking economics at school in the UK: 1 in 17 - Compared with boys, showing a gender gap in economics uptake. Boys taking economics at school in the UK: 1 in 6 - Used to illustrate the subject’s gender imbalance. Students taking economics overall in the UK: about 1 in 10 - Economics is described as roughly as popular as geography. Cost of worming intervention: $3.50 per child per year - Used as an example of a highly cost-effective development intervention. World population infected with worms: more than a quarter - In the deworming segment describing the scale of parasitic infection. Replication distance disputed: up to 6 kilometres vs up to 3 kilometres - Original authors and replication team disagreed over indirect effects around treated schools. Baby arrival timing: 48 minutes before due date - A lighthearted update about the producer’s baby arriving just before the deadline.

Pivotal Quotes: "the same way in which you would run a randomised controlled trial in medicine ... You could do that in economics too" — Tim Harford: Explaining the core methodological breakthrough behind the Nobel-winning work. "It matters particularly in economics because of the link between economics and policymaking." — Professor Sarah Smith: Why diversity in economics has consequences beyond academia. "You need to hand out textbooks, flip charts to some schools, and you need to deny them to other schools." — Tim Harford: Describing why random assignment is necessary to establish causality in aid evaluation.

Implications: The episode reinforces that evidence-based policy depends on rigorous experiments and replication. It also suggests economics must broaden participation to improve both scholarship and the policies informed by it.