Ahabyona Derrick
@derrickahabyona.bsky.social
Economist. Masters Student @pse.bsky.social. Previously @unaids.org.
Kampala - Nairobi - Paris📍
Kampala - Nairobi - Paris📍
Reposted by Ahabyona Derrick
"Even after accounting for the upfront costs and delayed benefits, enrolling marginal applicants to public universities generates substantial net returns for society, the marginal students themselves, and the government budget."
Public Universities FTW!
Public Universities FTW!
December 24, 2025 at 9:00 PM
"Even after accounting for the upfront costs and delayed benefits, enrolling marginal applicants to public universities generates substantial net returns for society, the marginal students themselves, and the government budget."
Public Universities FTW!
Public Universities FTW!
Reposted by Ahabyona Derrick
Ethiopia imports much more from China than it used to, as do many other African countries—
China’s central role in merchandise trade is the result of a large change that has taken place in just a few decades. This change has been especially large in Africa and South America.
China’s central role in merchandise trade is the result of a large change that has taken place in just a few decades. This change has been especially large in Africa and South America.
December 11, 2025 at 2:40 PM
Ethiopia imports much more from China than it used to, as do many other African countries—
China’s central role in merchandise trade is the result of a large change that has taken place in just a few decades. This change has been especially large in Africa and South America.
China’s central role in merchandise trade is the result of a large change that has taken place in just a few decades. This change has been especially large in Africa and South America.
Reposted by Ahabyona Derrick
Introducing the world to our amazing Malengo students, vol. 3:
Please meet Ratif Ssemujju, who is a Malengo Uganda–University Scholar studying Management and Data Science at the Technical University of Munich, Germany.
youtu.be/dbpN5gwdj9s
Please meet Ratif Ssemujju, who is a Malengo Uganda–University Scholar studying Management and Data Science at the Technical University of Munich, Germany.
youtu.be/dbpN5gwdj9s
Malengo Scholar Profiles: Ratif Ssemujju, Uganda–Germany University Scholar
YouTube video by Malengo Inc.
youtu.be
December 18, 2025 at 11:01 PM
Introducing the world to our amazing Malengo students, vol. 3:
Please meet Ratif Ssemujju, who is a Malengo Uganda–University Scholar studying Management and Data Science at the Technical University of Munich, Germany.
youtu.be/dbpN5gwdj9s
Please meet Ratif Ssemujju, who is a Malengo Uganda–University Scholar studying Management and Data Science at the Technical University of Munich, Germany.
youtu.be/dbpN5gwdj9s
Reposted by Ahabyona Derrick
📄𝗡𝗘𝗪 𝗣𝗨𝗕𝗟𝗜𝗖𝗔𝗧𝗜𝗢𝗡 by @kristoftiteca.bsky.social & Yotam Gidron
@egmontinstitute.bsky.social
"Will Uganda’s ‘Open-Door’ Refugee Policy Hold? Aid Cuts and Rising Anti-Immigration Sentiments"
#Uganda #Refugees #ForcedDisplacement #MigrationPolicy #HumanitarianCrisis
𝗥𝗲𝗮𝗱 𝗺𝗼𝗿𝗲👉 tinyurl.com/evrkmay6
@egmontinstitute.bsky.social
"Will Uganda’s ‘Open-Door’ Refugee Policy Hold? Aid Cuts and Rising Anti-Immigration Sentiments"
#Uganda #Refugees #ForcedDisplacement #MigrationPolicy #HumanitarianCrisis
𝗥𝗲𝗮𝗱 𝗺𝗼𝗿𝗲👉 tinyurl.com/evrkmay6
December 16, 2025 at 9:10 AM
📄𝗡𝗘𝗪 𝗣𝗨𝗕𝗟𝗜𝗖𝗔𝗧𝗜𝗢𝗡 by @kristoftiteca.bsky.social & Yotam Gidron
@egmontinstitute.bsky.social
"Will Uganda’s ‘Open-Door’ Refugee Policy Hold? Aid Cuts and Rising Anti-Immigration Sentiments"
#Uganda #Refugees #ForcedDisplacement #MigrationPolicy #HumanitarianCrisis
𝗥𝗲𝗮𝗱 𝗺𝗼𝗿𝗲👉 tinyurl.com/evrkmay6
@egmontinstitute.bsky.social
"Will Uganda’s ‘Open-Door’ Refugee Policy Hold? Aid Cuts and Rising Anti-Immigration Sentiments"
#Uganda #Refugees #ForcedDisplacement #MigrationPolicy #HumanitarianCrisis
𝗥𝗲𝗮𝗱 𝗺𝗼𝗿𝗲👉 tinyurl.com/evrkmay6
Reposted by Ahabyona Derrick
Noise pollution from electric passenger rail harms babies' health.
"I estimate that the annual cost of noise pollution due to harms to health at birth is $9.8 billion."
Black, Hispanic, and the poorest Americans disproportionately bear these costs.
This is such a cool paper!
"I estimate that the annual cost of noise pollution due to harms to health at birth is $9.8 billion."
Black, Hispanic, and the poorest Americans disproportionately bear these costs.
This is such a cool paper!
December 5, 2025 at 7:12 PM
Noise pollution from electric passenger rail harms babies' health.
"I estimate that the annual cost of noise pollution due to harms to health at birth is $9.8 billion."
Black, Hispanic, and the poorest Americans disproportionately bear these costs.
This is such a cool paper!
"I estimate that the annual cost of noise pollution due to harms to health at birth is $9.8 billion."
Black, Hispanic, and the poorest Americans disproportionately bear these costs.
This is such a cool paper!
Reposted by Ahabyona Derrick
China’s fertility rate has fallen to one, continuing a long decline that began before and continued after the one-child policy—
The 1970s were a decade shaped by fears about overpopulation. As the world’s most populous country, China was never far from the debate.
The 1970s were a decade shaped by fears about overpopulation. As the world’s most populous country, China was never far from the debate.
November 27, 2025 at 12:54 PM
China’s fertility rate has fallen to one, continuing a long decline that began before and continued after the one-child policy—
The 1970s were a decade shaped by fears about overpopulation. As the world’s most populous country, China was never far from the debate.
The 1970s were a decade shaped by fears about overpopulation. As the world’s most populous country, China was never far from the debate.
Reposted by Ahabyona Derrick
I'm excited, the RCT suggests Malengo increases psychological well‑being by about 0.36 standard deviations. As a reference point, this is similar in magnitude to the improvements after vision-restoring cataract surgery.
This is not obvious a priori!
This is not obvious a priori!
Exciting news on @malengo.org, the NGO that helps East African students move to Europe for education: Our research team has given us a glimpse of their early findings!
Here is the full writeup, joint with @richardnerland.bsky.social:
forum.effectivealtruism.org/posts/CpZYHk...
Thread follows!
Here is the full writeup, joint with @richardnerland.bsky.social:
forum.effectivealtruism.org/posts/CpZYHk...
Thread follows!
November 27, 2025 at 9:01 PM
I'm excited, the RCT suggests Malengo increases psychological well‑being by about 0.36 standard deviations. As a reference point, this is similar in magnitude to the improvements after vision-restoring cataract surgery.
This is not obvious a priori!
This is not obvious a priori!
Reposted by Ahabyona Derrick
Aspiring Economists from Africa:
Graduate scholarships at Oxford
Webinar to explain all - how to apply, what makes strong application, necessary steps to take...
see also csae.ox.ac.uk/scholarships
Graduate scholarships at Oxford
Webinar to explain all - how to apply, what makes strong application, necessary steps to take...
see also csae.ox.ac.uk/scholarships
September 23, 2025 at 1:03 PM
Aspiring Economists from Africa:
Graduate scholarships at Oxford
Webinar to explain all - how to apply, what makes strong application, necessary steps to take...
see also csae.ox.ac.uk/scholarships
Graduate scholarships at Oxford
Webinar to explain all - how to apply, what makes strong application, necessary steps to take...
see also csae.ox.ac.uk/scholarships
Reposted by Ahabyona Derrick
I'm excited to share a new way to support Malengo students!
Through a new partnership with Neta (netafoundation.org), you can now invest in the success of @malengo.org students, and earn a return on your investment. 1/4
Through a new partnership with Neta (netafoundation.org), you can now invest in the success of @malengo.org students, and earn a return on your investment. 1/4
Home | Neta Foundation
Neta offers the first Donor Advised Fund that allows you to discover and invest in impactful technologies and research.
netafoundation.org
November 13, 2025 at 8:36 PM
I'm excited to share a new way to support Malengo students!
Through a new partnership with Neta (netafoundation.org), you can now invest in the success of @malengo.org students, and earn a return on your investment. 1/4
Through a new partnership with Neta (netafoundation.org), you can now invest in the success of @malengo.org students, and earn a return on your investment. 1/4
Reposted by Ahabyona Derrick
One of the great joys of working on @malengo.org is interacting with our amazing students. Here is a conversation I had with Hillary Turinawe, who is studying Medicine in Bonn, Germany.
Meet the @malengo.org Scholars:
Hillary Turinawe is a Malengo Uganda–University Scholar studying Human Medicine at the University of Bonn, Germany. Here he is being interviewed by Johannes Haushofer, CEO of Malengo.
www.youtube.com/watch?v=PzNX...
Hillary Turinawe is a Malengo Uganda–University Scholar studying Human Medicine at the University of Bonn, Germany. Here he is being interviewed by Johannes Haushofer, CEO of Malengo.
www.youtube.com/watch?v=PzNX...
Manelgo Scholar Profiles: Hillary Turinawe, Uganda–Germany University Scholar
YouTube video by Malengo Inc.
www.youtube.com
October 26, 2025 at 1:56 AM
One of the great joys of working on @malengo.org is interacting with our amazing students. Here is a conversation I had with Hillary Turinawe, who is studying Medicine in Bonn, Germany.
Reposted by Ahabyona Derrick
(1) banger
(2) i wish non-economists would realise just how much time each economics paper takes to write (because of our norms about how thorough each paper has to be)
(2) i wish non-economists would realise just how much time each economics paper takes to write (because of our norms about how thorough each paper has to be)
We just spent 6 months to add 1 figure to this paper. Some people said, "Couples aren't prioritizing men's careers. Men just have better earnings opportunities when moving."
Earnings effects of moves for couples on the left, singles on the right. Negligible gap between single men and women.
Earnings effects of moves for couples on the left, singles on the right. Negligible gap between single men and women.
October 7, 2025 at 3:48 PM
(1) banger
(2) i wish non-economists would realise just how much time each economics paper takes to write (because of our norms about how thorough each paper has to be)
(2) i wish non-economists would realise just how much time each economics paper takes to write (because of our norms about how thorough each paper has to be)
Reposted by Ahabyona Derrick
📊 Data update: We've just updated to the 2025 release of the OECD Government at a Glance dataset.
It has general government spending data up to 2024 and spending by function data up to 2023.
This update was led on our team by @parriagadap.bsky.social.
It has general government spending data up to 2024 and spending by function data up to 2023.
This update was led on our team by @parriagadap.bsky.social.
July 22, 2025 at 4:48 PM
📊 Data update: We've just updated to the 2025 release of the OECD Government at a Glance dataset.
It has general government spending data up to 2024 and spending by function data up to 2023.
This update was led on our team by @parriagadap.bsky.social.
It has general government spending data up to 2024 and spending by function data up to 2023.
This update was led on our team by @parriagadap.bsky.social.
Reposted by Ahabyona Derrick
What happened when the U.S. forcibly sent 400,000 Mexican workers back to Mexico in the 1930s?
The employment rate of native workers *went down* noticeably as a direct result. (You read that correctly)
Why?
Forced repatriation destroyed low-skill markets.
www.sciencedirect.com/science/arti...
The employment rate of native workers *went down* noticeably as a direct result. (You read that correctly)
Why?
Forced repatriation destroyed low-skill markets.
www.sciencedirect.com/science/arti...
June 10, 2025 at 9:49 PM
What happened when the U.S. forcibly sent 400,000 Mexican workers back to Mexico in the 1930s?
The employment rate of native workers *went down* noticeably as a direct result. (You read that correctly)
Why?
Forced repatriation destroyed low-skill markets.
www.sciencedirect.com/science/arti...
The employment rate of native workers *went down* noticeably as a direct result. (You read that correctly)
Why?
Forced repatriation destroyed low-skill markets.
www.sciencedirect.com/science/arti...
Reposted by Ahabyona Derrick
I would rarely do this, but I happen to know Derrick, and even wrote in his support for his applications. So, if you so inclined, this humble, ambitious, widely read, smart young budding African economist will work extremely hard not to disappoint.
shorturl.at/RgOVn
shorturl.at/RgOVn
Donate to Help Derrick Go to Paris school of Economics, organised by Clare Nakimpi
My name is Derrick Ahabyona and I am deeply honored to have been accepted i… Clare Nakimpi needs your support for Help Derrick Go to Paris school of Economics
shorturl.at
May 29, 2025 at 9:02 PM
I would rarely do this, but I happen to know Derrick, and even wrote in his support for his applications. So, if you so inclined, this humble, ambitious, widely read, smart young budding African economist will work extremely hard not to disappoint.
shorturl.at/RgOVn
shorturl.at/RgOVn
Reposted by Ahabyona Derrick
📊 Data update: We've just updated the data in our charts on electric vehicles!
The data comes from @iea.org’s Global EV Outlook 2025.
This update was led on our team by @hannahritchie.bsky.social.
The data comes from @iea.org’s Global EV Outlook 2025.
This update was led on our team by @hannahritchie.bsky.social.
May 29, 2025 at 4:51 PM
📊 Data update: We've just updated the data in our charts on electric vehicles!
The data comes from @iea.org’s Global EV Outlook 2025.
This update was led on our team by @hannahritchie.bsky.social.
The data comes from @iea.org’s Global EV Outlook 2025.
This update was led on our team by @hannahritchie.bsky.social.
Reposted by Ahabyona Derrick
What can people doing field experiments learn from a new guide to lab experiments? @berkozler12.bsky.social discusses in today's blog and doesn't find that much
blogs.worldbank.org/en/impacteva...
blogs.worldbank.org/en/impacteva...
You do field experiments: is there anything you should learn from laboratory experiments?
blogs.worldbank.org
May 7, 2025 at 1:50 PM
What can people doing field experiments learn from a new guide to lab experiments? @berkozler12.bsky.social discusses in today's blog and doesn't find that much
blogs.worldbank.org/en/impacteva...
blogs.worldbank.org/en/impacteva...
Reposted by Ahabyona Derrick
🚨Development Economists!🚨Do you use Demographic and Health Surveys (DHS Program) data, which had been supported by USAID? IPUMS ( @ipums.bsky.social ) and the UN Statistics Division have a survey for you. I just filled it out. You can too. #econsky
Users of the Demographic and Health Surveys, please take the United Nations Statistics Division DHS impact survey (form.jotform.com/250913880478...) regarding recent cuts. Replies inform future planning and advocacy. All responses are confidential and presented only in aggregate.
Questionnaire on the use of the Demographic and Health Surveys (DHS) data
Please click the link to complete this form.
form.jotform.com
April 21, 2025 at 8:24 PM
🚨Development Economists!🚨Do you use Demographic and Health Surveys (DHS Program) data, which had been supported by USAID? IPUMS ( @ipums.bsky.social ) and the UN Statistics Division have a survey for you. I just filled it out. You can too. #econsky
Reposted by Ahabyona Derrick
Field evidence from Uganda on how trading networks shape firms’ tax behavior by #JustineKnebelmann @mitofficial.bsky.social
Paper: "Trading Networks and Tax Compliance: Experimental Evidence from Uganda"
Co-authors: Miguel Almunia, David Henning, Dorothy Nakyambadde, & Lin Tian
#CEPRNovaSBE2025
Paper: "Trading Networks and Tax Compliance: Experimental Evidence from Uganda"
Co-authors: Miguel Almunia, David Henning, Dorothy Nakyambadde, & Lin Tian
#CEPRNovaSBE2025
April 23, 2025 at 9:36 AM
Field evidence from Uganda on how trading networks shape firms’ tax behavior by #JustineKnebelmann @mitofficial.bsky.social
Paper: "Trading Networks and Tax Compliance: Experimental Evidence from Uganda"
Co-authors: Miguel Almunia, David Henning, Dorothy Nakyambadde, & Lin Tian
#CEPRNovaSBE2025
Paper: "Trading Networks and Tax Compliance: Experimental Evidence from Uganda"
Co-authors: Miguel Almunia, David Henning, Dorothy Nakyambadde, & Lin Tian
#CEPRNovaSBE2025
Reposted by Ahabyona Derrick
We kicked off 2025 with the full Malengo team in Nairobi—diving into strategy, culture, scholar & staff welfare, and more. We also made time to connect, relax, and have fun! Excited to share more in 2025 🎉 Learn more: www.malengo.org
#Malengo #Education #Migration
#Malengo #Education #Migration
April 23, 2025 at 1:34 PM
We kicked off 2025 with the full Malengo team in Nairobi—diving into strategy, culture, scholar & staff welfare, and more. We also made time to connect, relax, and have fun! Excited to share more in 2025 🎉 Learn more: www.malengo.org
#Malengo #Education #Migration
#Malengo #Education #Migration
Reposted by Ahabyona Derrick
Every year, more than half of the global area burned by wildfire is in Africa
April 14, 2025 at 5:37 PM
Every year, more than half of the global area burned by wildfire is in Africa
Reposted by Ahabyona Derrick
📊 Data update: We've just updated many of our charts on marriage and divorce!
April 10, 2025 at 11:48 AM
📊 Data update: We've just updated many of our charts on marriage and divorce!
Reposted by Ahabyona Derrick
Remember the "Highlights" that some Elsevier journals require? Dean Karlan and friends developed an amazing way to troll them: haikus!
April 15, 2025 at 5:35 PM
Remember the "Highlights" that some Elsevier journals require? Dean Karlan and friends developed an amazing way to troll them: haikus!
Reposted by Ahabyona Derrick
Rethinking foreign aid: In a new op-ed, Abhijit Banerjee and Esther Duflo call for governments outside of the US, multilateral institutions, and philanthropists to take the lead on impactful and cost-effective foreign aid. buff.ly/gRYRszI
Abhijit Banerjee and Esther Duflo: Foreign aid can be effective without the US
[FREE TO READ] In the wake of USAID cuts, wealthy nations and individuals must take the reins
buff.ly
March 7, 2025 at 9:23 PM
Rethinking foreign aid: In a new op-ed, Abhijit Banerjee and Esther Duflo call for governments outside of the US, multilateral institutions, and philanthropists to take the lead on impactful and cost-effective foreign aid. buff.ly/gRYRszI
Reposted by Ahabyona Derrick
Foreign aid programs have played a crucial role in the fight against polio.
In the early 1980s, almost half a million people worldwide were paralyzed by polio every year, most of them children. But since the peak in 1981, the number of cases has fallen by more than 99%.
In the early 1980s, almost half a million people worldwide were paralyzed by polio every year, most of them children. But since the peak in 1981, the number of cases has fallen by more than 99%.
March 10, 2025 at 1:59 PM
Foreign aid programs have played a crucial role in the fight against polio.
In the early 1980s, almost half a million people worldwide were paralyzed by polio every year, most of them children. But since the peak in 1981, the number of cases has fallen by more than 99%.
In the early 1980s, almost half a million people worldwide were paralyzed by polio every year, most of them children. But since the peak in 1981, the number of cases has fallen by more than 99%.
Reposted by Ahabyona Derrick
My op-ed on the aid cuts in the US, the UK and Europe in The Independent:
Foreign aid is how countries show their national character to the world
www.independent.co.uk/voices/musk-...
Foreign aid is how countries show their national character to the world
www.independent.co.uk/voices/musk-...
Musk is wrong – foreign aid is how countries show their character to the world
The evidence shows international aid – when spent correctly – can bring tremendous benefits and save millions of lives, writes expert and author Stefan Dercon. But if helping people cope with deprivat...
www.independent.co.uk
March 5, 2025 at 8:36 AM
My op-ed on the aid cuts in the US, the UK and Europe in The Independent:
Foreign aid is how countries show their national character to the world
www.independent.co.uk/voices/musk-...
Foreign aid is how countries show their national character to the world
www.independent.co.uk/voices/musk-...