S2 Ep52: Has the randomista revolution gone too far?

Episode Summary

Executive Summary: A Vox Talks 2019 special discusses the Nobel Prize awarded to Duflo, Banerjee, and Kremer for pioneering RCTs in development economics. Critics like Lant Pritchett argue the focus on RCTs neglects the primary driver of poverty reduction—rising median income—and serves philanthropic interests more than systemic change. Supporters like Oriana Bandiera defend RCTs as transformative, complementary to growth theory, and emphasize the need for better researcher-policymaker collaboration.

Main Topics: Nobel Prize Justification (Priority: 5/5): Discussion of whether Duflo, Banerjee, and Kremer deserved the 2019 Nobel for pioneering RCTs in development economics. RCTs vs. Median Income Growth (Priority: 5/5): Lant Pritchett's argument that poverty is nearly perfectly correlated with median income, making targeted RCTs less impactful than growth-focused policies. Philanthropy's Influence on Research (Priority: 4/5): Criticism that philanthropists prefer RCTs because they offer visible, attributable results without addressing systemic issues like median income. Policy Relevance of RCTs (Priority: 4/5): Debate on whether policymakers actually use RCT findings, with Bill Easterly arguing they prefer larger-scale growth policies. Complementarity of Approaches (Priority: 3/5): Oriana Bandiera's view that RCTs and growth theory are complementary, not competing, and both are needed to address poverty. Academic vs. Practitioner Divide (Priority: 3/5): The real schism is between academic economists and policymakers, not within the discipline itself. Career Incentives in Development Economics (Priority: 2/5): Claim that young researchers are pushed toward RCTs for career advancement, potentially neglecting broader growth research.

Key Arguments: Lant Pritchett argues that poverty is almost perfectly correlated with median income (correlation of 0.99), so focusing on small-scale RCTs misses the main driver of poverty reduction. Philanthropists favor RCTs because they provide attributable credit for direct poverty interventions without addressing median income changes. Oriana Bandiera counters that growth alone doesn't eliminate poverty (citing India's continued poverty despite high growth), and poverty traps require targeted interventions. Bill Easterly claims policymakers prefer big-picture growth policies over small RCT-tested programs, reducing policy relevance. Bandiera emphasizes that effective RCTs require co-generation with policymakers, not researcher-imposed experiments. The profession is more united than portrayed; the real division is between practitioners and economists, not within academia.

Data Points: Correlation between median income and poverty rate: 0.99 - Lant Pritchett argues that poverty variation across countries is almost entirely explained by median income. GDP gain from India's growth acceleration (early 1990s): $3 trillion - Pritchett uses this to highlight the massive impact of growth policies compared to targeted programs. GDP gain from China's growth acceleration: $11 trillion - Further emphasizes the scale of growth-led poverty reduction. India's status change (no longer developing per FID): Not a developing country - Oriana Bandiera notes that despite high growth, millions remain below the poverty line in India. RCTs reaching millions of people: Many millions - Bandiera cites the impact of the Nobel laureates' RCTs on policy and poverty reduction.

Pivotal Quotes: "People keep saying that the recent Nobelists studied global poverty. This is exactly wrong. They made a commitment to a method, not a subject, and a commitment to method prevented them from studying global poverty." — Lant Pritchett: His Facebook post after the Nobel announcement, criticizing the focus on RCTs over broader poverty drivers. "Policymakers want things that have substantial effects on development prospects, and you're not going to get that from some program to improve teacher attendance in schools through taking photographs of the teachers." — Bill Easterly: Arguing that RCTs on small interventions lack appeal for policymakers seeking major changes. "What the true division is, is between practitioners and economists. And that's the gulf that we have to fill." — Oriana Bandiera: Highlighting the need for better collaboration between researchers and policymakers to improve policy impact.

Implications: The debate underscores a need for balanced research agendas combining RCTs and growth analysis. For policymakers, the lesson is to demand co-generated evidence. For funders, systemic change may require investing beyond attributable projects. The profession must bridge the academic-practitioner gap to enhance real-world impact.