Tuesday, March 10, 2026

Fuhito Kojima wins the R. K. Cho Economics Prize from Yonsei University

 Here's the announcement:

R. K. Cho Economics Prize 

"The R. K. Cho Economics Prize 2026 will be awarded to Professor Fuhito Kojima (University of Tokyo) for the practical development and implementation of matching theory.

"Professor Kojima is a leading scholar in the fields of matching theory and market design. He has developed these fields by studying practical aspects of matching markets such as large markets and distributional constraints. Building on his theoretical knowledge, he has contributed to the improvement of real-world matching and allocation mechanisms, including medical residency programs and nursery school admissions in Japan."

Here's the program of celebratory events:

2026 R. K. Cho Economics Prize Events  (May 6-8)

Symposium Celebrating 
Fuhito Kojima's Prize
323 Daewoo Hall, Yonsei University
May 6 (Wednesday)
9:00-9:20 Registration, Opening Remark

9:20-10:10 Fuhito Kojima (University of Tokyo)

"Fragmentation of Matching Markets and How Economics Can Help Integrate Them"

10:10-11:00 Michihiro Kandori (University of Tokyo)

"The Second Welfare Theorem in Markets with Discrete and Continuous Goods"

11:10-12:00 Yeon-Koo Che (Columbia University)

"Learning Against Nature: Minimax Regret and the Price of Robustness"

13:00-13:50 Duk Gyoo Kim (Yonsei University)

"Good-Citizen Lottery"

14:00-14:50 Jinwoo Kim (Hong Kong University of Science and Technology)

"Monotone Comparative Statics without Lattices"

Prize Ceremony
B130 Daewoo Hall, Yonsei University
May 6 (Wednesday)
15:00-15:20 Registration

15:20-16:10 Award Ceremony

16:20-17:10 Award Lecture by Fuhito Kojima

"Science and Engineering of Market Design: Call for Action"


Fuhito Kojima Public Lecture Series
323 Daewoo Hall, Yonsei University
May 7 (Thursday)
13:00-14:30 Lecture 1: "Introduction to Matching Theory and Market Design"

15:00-16:30 Lecture 2: "How to Use Market Design under Practical Constraints of Society: Part 1"

May 8 (Friday)
10:00-11:30 Lecture 3: "How to Use Market Design under Practical Constraints of Society: Part 2"

Organizers: Jaeok Park, Daeyoung Jeong, Duk Gyoo Kim

Contact: rkcho.prize@yonsei.ac.kr 

Monday, March 9, 2026

Kidney exchange developments in India, Brazil, Saudi Arabia and Germany

 Here are recent reports on kidney exchange from  India, Brazil, Saudi Arabia and Germany.

 Atul Agnihotri: SOMETHING REMARKABLE IS HAPPENING IN KIDNEY TRANSPLANTATION IN INDIA.

"Through collaboration with 63 transplant centers, APKD India enabled 130 kidney swap transplants in 2025, quietly becoming ONE OF THE LARGEST KIDNEY SWAP PROGRAMS outside the U.S.

And the momentum continues — January has already kicked off with 22 swap transplants.

A powerful reminder that when hospitals collaborate, more patients receive the gift of life.

"One Nation, One Swap."

https://lnkd.in/gZD6Q-md "

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Here's an article on the clinical trials of kidney exchange in Brazil, in preparation for a possible change in the transplant law to make it standard practice. 

Doação Renal Pareada (DRP) no Brasil: relato do primeiro caso envolvendo três duplas    Kidney Paired Donation (KPD) in Brazil: first 3-way case report   by Juliana Bastos, Glaucio Silva de Souza, Marcio Luiz de Sousa, Pedro Bastos Guimarães de
Almeida, Thais Freesz, David Jose de Barros
Machado, Elias David-Neto, Gustavo Fernandes Ferreira   https://doi.org/10.1590/2175-8239-JBN-2025-0177pt

 Abstract: Kidney Paired Donation (KPD) is a transformative strategy in living kidney donor transplantation (LDKT), particularly for overcoming immunological barriers that preclude direct donation. In 2021, KPD accounted for one-fifth of adult LDKT and for half of LDKT for sensitized recipients in the United States. In Brazil, with a high prevalence of chronic kidney disease (CKD) and over 30,000 patients on transplant waiting lists, the demand for compatible donors far exceeds supply. This article presents a case report of KPD in the Brazilian context, illustrating its feasibility and highlighting challenges and considerations for broader implementation. The case demonstrates KPD’s potential to increase transplant rates, improve outcomes, and reduce dialysis costs. Nevertheless, structural, ethical, and regulatory challenges remain. This report emphasizes the implications of expanding KPD as a sustainable, life-saving strategy in Brazil.

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Here's a report from  King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia: 

Almeshari, K.A., Broering, D.C., Obeid, D.A., Alali, A.N., Algharabli, A.N., Pana, N.L. and ALI, T.Z., Innovative Strategies in Kidney Paired Donation: Single-Center Experience Achieving the Highest Annual Transplant Volume Globally. Frontiers in Immunology, 17, p.1623684. 

"Methods: We analyzed all kidney transplants performed through our KPD program between January and December 2024. The program aimed to achieve full HLA and ABO compatibility for incompatible pairs, while also incorporating additional strategies: inclusion of compatible pairs to improve HLA matching, acceptance of ABO quasi-compatible matches (e.g., A2 donors to O or B recipients), low-risk HLA-incompatible matching for HLA-incompatible candidates with cPRA >80%, and ABO-incompatible matching for those with cPRA >95%.

Results: A total of 135 patients (121 adults, 14 pediatrics) underwent KPD-facilitated transplantation, including 69 HLA-incompatible (51.1%), 37 ABO-incompatible (27.4%), and 29 compatible (21.5%) pairs. Females comprised 60.7% of the cohort, with a significantly higher proportion in the HLA-incompatible group (p < 0.001). HLA-incompatible recipients were older than others (mean age 42.5 years, p < 0.001). Most transplants (93.3%) occurred through 2- to 5-way closed chains, with the remainder via domino chains (6.7%). 

...

Conclusion: Our single-center experience demonstrates the feasibility and effectiveness of a high-volume KPD program in overcoming immunologic barriers to kidney transplantation. Strategic inclusion of compatible pairs, ABO quasi-compatible matching, low-risk HLA-incompatible, and ABO-incompatible matchings significantly increased access for difficult-to-match recipients. This model may serve as a replicable framework for other high-capacity transplant centers seeking to expand transplant access and improve outcomes for complex patient populations. "

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And here's a report on proposed German legislation to (finally) make kidney exchange legal in Germany: 

Biró, P., Budde, K., Burnapp, L., Cseh, Á., Kurschat, C., Manlove, D., & Ockenfels, A. (2026). Germany's Path to a National Kidney Exchange Program: An Assessment of the 2024 Legislative Proposal. Health Policy, 166, 105578. 

"Highlights

The German Federal Parliament plans to amend the Transplantation Act (1997).

The main goal of the reform is to establish a national kidney exchange program.

The draft law follows European best practices in many respects.

However, the law prohibits the participation of compatible donor–recipient pairs, contrary to international evidence.

Germany may join cross-border kidney exchange programs in the future. "

 

Saturday, March 7, 2026

Work from home increases fertility

 Here's a recent paper showing that work from home (WFH) increases fertility, expecially if both couples work from home.  The proposed mechanism is that WFH offers increased flexiblilty for child care...

 Work from Home and Fertility  by Cevat Giray Aksoy, Jose Maria Barrero, Nicholas Bloom, Katelyn Cranney, Steven J. Davis, Mathias Dolls, and Pablo Zarate,  January 29, 2026
 

Abstract: We investigate how fertility relates to work from home (WFH) in the post-pandemic era, drawing on original data from our Global Survey of Working Arrangements and U.S. Survey of Working Arrangements and Attitudes. Realized fertility from 2023 to early 2025 and future planned fertility are higher among adults who WFH at least one day a week and, for couples, higher yet when both partners do so. Estimated lifetime fertility is greater by 0.32 children per woman when both partners WFH one or more days per week as compared to the case where neither does. The implications for national fertility rates differ across countries due mainly to large differences in WFH rates. In a complementary analysis using other U.S. data, one-year fertility rates in the 2023-2025 period rise with WFH opportunities in one’s own occupation and, for couples, in the partner’s occupation. 

 "Flexibility in when, where, and how to work – or the absence of such flexibility – is a potentially important factor in fertility decisions (Goldin, 2014, 2021). Jobs that allow work from home (WFH) typically offer more flexibility in these respects, making it easier for parents to combine child rearing with employment, and perhaps raising fertility. In this light, we investigate how realized and planned fertility relate to the WFH status of individuals and couples."

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 The FT has this on that: 

Could working from home solve the global fertility crisis?
New research shows allowing more flexibility to fit jobs around family could enable people to have more children 
 by Ashley Armstrong

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One can imagine that having both members of a couple work from home might raise fertility even more directly than through the prospect of increased flexibility for child care.   In that respect, WFH reminds me of Philip Larkin’s 1974 poem Annus Mirabilis:

“Sexual intercourse began
In nineteen sixty-three
(which was rather late for me) -
Between the end of the Chatterley ban
And the Beatles' first LP.”

 

Thursday, March 5, 2026

Medical training becomes less desirable in abortion-restricting states

 Here's a new study of applications to medical residency programs, suggesting that medical training has become less desirable in states with abortion restrictions, especially in abortion-related specialties, including obstetrics and gynecology, family medicine, internal medicine, and emergency medicine.

Ganguly AP, Basu A, Morenz AM. State-Level Disparities in Residency Applications After Dobbs v Jackson Women’s Health Organization. JAMA Netw Open. 2026;9(3):e260286. doi:10.1001/jamanetworkopen.2026.0286 

 "In this cross-sectional study with an ITS analysis of 24 193 864 applications to 4315 residency programs for 5 years across all medical specialties, we observed a statistically significant disparity in applications from both women and men in states with abortion restrictions following the Dobbs decision in 2022 compared with states that did not enact restrictions. Despite overall increases in the number of residency applications during the study period, existing disparities between application volume to programs in abortion-restricted and nonrestricted states widened for women applying to residency, and new disparities emerged for men applying to residency post-Dobbs. Stratified analyses suggested that specialty type may influence differences, as effect sizes were increased among abortion-related specialties and decreased among the most competitive specialties.

"These findings affirm and expand on recent studies demonstrating decreased OBGYN residency applications and applicant interest in abortion-restricted states following the Dobbs decision.19 Additional studies have reported challenges faced by OBGYN programs in abortion-restricted states, including nonadherence to accreditation standards requiring abortion training, financial constraints for medical training, and burnout among residents and program leadership."

 

 

Tuesday, March 3, 2026

Nick Bloom discusses work from home

 Econ To Go is a Stanford series in which Neale Mahoney, the director of SIEPR, interviews an economist.

In this one he interviews the inimitable Nick Bloom, who is perhaps the leading scholar of the growing pattern of work from home.