🔥The 9th Round of Easy Loan, Earn $40 Reward is in progress❗️ ⏰ Promotion Period: January 15th - Feburary 15th, 2025 👉 Register now and check more details at gate.io/campaigns/358

The 4th DIME-KDIS Development Impact Conference will be held on Nov 2-3 in Washington DC. The deadline to register is Oct 26. Limited space for in-person attendance but one can also attend online. Check out the conference schedule and register NOW! worldbank.org/en/events/2023…

I am so proud of my team Patrick Premand, Dahyeon Jeong and so many others who devote their lives to reimagine our future. It is easy to predict doom. It is much harder to have the courage and creativity to envision and find ways for us to secure a brighter future.

If you have uneven attrition by treatment status, should you just focus remaining surveying on the group with lower response so far? I share my thoughts on what to do if you have surveyed 87% of T and 77% of C after regular efforts blogs.worldbank.org/impactevaluati…

Super interesting: The way we measure global poverty focuses -- inadvertently, but perhaps usefully -- pretty heavily on households' ability to cope with shocks, rather than their average income over the year. joshmerfeld.github.io/assets/papers/… Josh Merfeld Jonathan Morduch

Cross-cut cash transfers in Malawi with an “input fair”. Cash increases investment by 27%, while the combination of cash and input fair increases investment by 40%, from Shilpa Aggarwal, Dahyeon Jeong, Kumar, David Sungho Park, @jmrtwentytwo, and @acspearot nber.org/papers/w32263

#Facebook's marketing data isn't just about 'likes' anymore—it's a goldmine for social research. Dive into our blog to learn how we crafted the innovative rsocialwatcher #R package, an open tool that streamlines access to Facebook's Marketing API. ➡️ wrld.bg/huhK50RAG1q

A large universal cash transfer in Liberia and Malawi improved food security for 1.5–2 years, driven by increased farm investment and production, from Shilpa Aggarwal, Aker, Dahyeon Jeong, Naresh Kumar, David Sungho Park, @jmrtwentytwo, and @acspearot nber.org/papers/w32431

One of my tennis doubles partners who played for a while on the ATP Tour shared his undergraduate economics thesis from 1982 with me. He argued and provided empirical evidence that there was a backward-bending labor supply curve in professional tennis. paulgp

Adopting a respondent-driven sampling approach to generate a diverse sample of traders to track value chains Sylvan Herskowitz ++

#Missing 19yo Amadou "Niko" Diop, was last seen on July 14, at 10:15pm in the 10000 block of Akhtamer Drive in Great Falls. He is 6'1", 150lbs, w/ brown hair & brown eyes. Unknown clothing description. Endangered due to mental &/or physical health concerns. Call 911 w/ info.

Colombia’s school feeding program: * Dropout rate ↓ 10-25% * Grade repetition ↓ 7-13% * High school completion ↑ 39% * Test score ↑ 0.1 standard deviations * Access to higher education ↑ 20%.

I'm #honored to share that I’ve been invited to deliver a #keynote lecture at the 5th Development Impact Conference in collaboration between the KDI School & World Bank DIME! Thank you KDI School & Josh Merfeld! Fellow #economists please submit your papers. NU School of Public Policy and Urban Affairs

Weekly links September 13: pricing health insurance, sharing research with subjects, cities, climate resilient ag, and more… blogs.worldbank.org/en/impactevalu…

In a new working paper, Jacobus Cilliers, Nour Elashmawy & I look at the use of PDS Lasso for selecting control variables in field experiments. This is an issue that in part came up through discussions a while back on Twitter, 1/5 blogs.worldbank.org/en/impactevalu…

Our paper "Local knowledge, formal evidence, and policy decisions" (with Aidan Coville and Sampada KC) is out at the JDE. Many people have the intuition that policymakers prefer evidence from their own context. To what extent is this true? 1/ 🧵

Tiny plastics, big problem - Gabe Englander summarizes a new paper that shows a link between marine microplastics and low birthweights in places close to the coasts blogs.worldbank.org/en/impactevalu…

Mean Reversion in RCTs: It may matter for targeting… @BerkOzler12 summarizes a new working paper that gives another reason why the average effect may be close to zero in an RCT despite it helping some people blogs.worldbank.org/en/impactevalu…

Weekly links February 14, 2025: sharing data and the problems of poor data, polisci trends, shift-share explained, and more… blogs.worldbank.org/en/impactevalu…

OK, I think ChatGPT 4o just changed grant proposal writing forever. Our problem, because of a tech and email mistake, we received notice that a huge proposal was due with less than a week notice, on a week when most of my Colombia team is on Easter holiday. 🧵

My first fieldwork 10 years ago that got me into ag and development. Grateful to those who supported me on this journey.