Gregor Semieniuk
@gregorsemieniuk.bsky.social
Associate Professor @ UMass Amherst | Political economy of the low-carbon transition, energy and resources in economic growth and development, inequality | Views are my own
Pinned
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
Reposted by Gregor Semieniuk
The affordability crisis is an inequality crisis. When prices spike in key sectors, it's not just inflation—it's a massive redistribution shock that hits poor households hardest.
In our **new working paper**, we identify the sectors that matter most. A thread 🧵
scholarworks.umass.edu/entities/pub...
In our **new working paper**, we identify the sectors that matter most. A thread 🧵
scholarworks.umass.edu/entities/pub...
December 8, 2025 at 8:42 PM
The affordability crisis is an inequality crisis. When prices spike in key sectors, it's not just inflation—it's a massive redistribution shock that hits poor households hardest.
In our **new working paper**, we identify the sectors that matter most. A thread 🧵
scholarworks.umass.edu/entities/pub...
In our **new working paper**, we identify the sectors that matter most. A thread 🧵
scholarworks.umass.edu/entities/pub...
Reposted by Gregor Semieniuk
German taxpayers are handing BMW €273m to once again attempt to push hydrogen-powered cars, when battery prices have once again dropped >50% in the past ~18 month and CATL is on its 5th-gen LFP battery.
CATL, BYD et al must be laughing all the way to the bank.
Sigh.
www.spiegel.de/wirtschaft/w...
CATL, BYD et al must be laughing all the way to the bank.
Sigh.
www.spiegel.de/wirtschaft/w...
Wasserstoff-Autos: BMW erhält staatliche Förderung zur Entwicklung
Hat der Einsatz von Wasserstoff eine Zukunft bei der Autoentwicklung? BMW glaubt nach wie vor daran. Jetzt erhält der Konzern eine staatliche Förderung für die Weiterentwicklung der Technologie.
www.spiegel.de
November 16, 2025 at 11:35 AM
German taxpayers are handing BMW €273m to once again attempt to push hydrogen-powered cars, when battery prices have once again dropped >50% in the past ~18 month and CATL is on its 5th-gen LFP battery.
CATL, BYD et al must be laughing all the way to the bank.
Sigh.
www.spiegel.de/wirtschaft/w...
CATL, BYD et al must be laughing all the way to the bank.
Sigh.
www.spiegel.de/wirtschaft/w...
Reposted by Gregor Semieniuk
If guaranteeing essentials sounds radical, it speaks to how far we have drifted from democracy‘s core promises. Markets will not beat back the far right. An antifascist economics might. Mamdani provides a playbook for democrats around the world.
My latest
My latest
Zohran Mamdani shows how Democrats can defeat authoritarians like Trump | Isabella Weber
Democrats have two choices: fight to make life affordable again for ordinary people or watch voters embrace authoritarians
www.theguardian.com
November 7, 2025 at 1:02 PM
If guaranteeing essentials sounds radical, it speaks to how far we have drifted from democracy‘s core promises. Markets will not beat back the far right. An antifascist economics might. Mamdani provides a playbook for democrats around the world.
My latest
My latest
Reposted by Gregor Semieniuk
We took a Minsky-style approach to understanding the refinancing risks across the sector and how they all interact. In other words, we made a TON of T-Charts to show exactly how capital flows. Balance sheets gotta balance!
November 12, 2025 at 1:34 PM
We took a Minsky-style approach to understanding the refinancing risks across the sector and how they all interact. In other words, we made a TON of T-Charts to show exactly how capital flows. Balance sheets gotta balance!
Reposted by Gregor Semieniuk
Public options for essentials, strategic price interventions, investment in housing and childcare — this is antifascist economics. It tackles the material conditions that make authoritarianism appealing.
In making life livable, democracy defends itself.
In making life livable, democracy defends itself.
November 8, 2025 at 11:01 AM
Public options for essentials, strategic price interventions, investment in housing and childcare — this is antifascist economics. It tackles the material conditions that make authoritarianism appealing.
In making life livable, democracy defends itself.
In making life livable, democracy defends itself.
Reposted by Gregor Semieniuk
Unter der Inflation haben viele Menschen gelitten. Andere fuhren große Profite ein, erklärt Wirtschaftsprofessor Gregor Semieniuk @gregorsemieniuk.bsky.social im Interview mit @maxhsr.bsky.social.
So haben Energiekonzerne von Krieg und Inflation profitiert
Unter der Inflation haben viele Menschen gelitten. Andere fuhren große Profite ein, erklärt Gregor Semieniuk im Interview.
www.surplusmagazin.de
November 8, 2025 at 11:01 AM
Unter der Inflation haben viele Menschen gelitten. Andere fuhren große Profite ein, erklärt Wirtschaftsprofessor Gregor Semieniuk @gregorsemieniuk.bsky.social im Interview mit @maxhsr.bsky.social.
Hat mich gefreut über die Energiepreiskrise 2022 in Europa und ihre Gewinner mit @maxhsr.bsky.social vom @surplusmagazin.bsky.social sky.social zu sprechen.
Interview:
www.surplusmagazin.de/energiekonze...
Zugrundeliegende Studie: www.sciencedirect.com/science/arti...
Interview:
www.surplusmagazin.de/energiekonze...
Zugrundeliegende Studie: www.sciencedirect.com/science/arti...
So haben Energiekonzerne von Krieg und Inflation profitiert
Unter der Inflation haben viele Menschen gelitten. Andere fuhren große Profite ein, erklärt Gregor Semieniuk im Interview.
www.surplusmagazin.de
November 8, 2025 at 10:59 AM
Hat mich gefreut über die Energiepreiskrise 2022 in Europa und ihre Gewinner mit @maxhsr.bsky.social vom @surplusmagazin.bsky.social sky.social zu sprechen.
Interview:
www.surplusmagazin.de/energiekonze...
Zugrundeliegende Studie: www.sciencedirect.com/science/arti...
Interview:
www.surplusmagazin.de/energiekonze...
Zugrundeliegende Studie: www.sciencedirect.com/science/arti...
Reposted by Gregor Semieniuk
No, it's still wrong. The rate of *temperature* increase has not decreased, in fact it has gone up. The rate of warming of past decade is about twice that between 80s and 2010. As for the argument that we have made progress with regards postulated end-of-century warming, I'm just too tired...
November 7, 2025 at 5:57 PM
No, it's still wrong. The rate of *temperature* increase has not decreased, in fact it has gone up. The rate of warming of past decade is about twice that between 80s and 2010. As for the argument that we have made progress with regards postulated end-of-century warming, I'm just too tired...
Reposted by Gregor Semieniuk
The claim that “emissions have come down” in this @nytimes.com @sominisengupta.bsky.social article on where we are ten years post-Paris is FALSE.
Global emissions were at an all-time high in 2024.
As it stands this claim is misinformation. They need to issue a correction!
Global emissions were at an all-time high in 2024.
As it stands this claim is misinformation. They need to issue a correction!
November 7, 2025 at 11:17 AM
The claim that “emissions have come down” in this @nytimes.com @sominisengupta.bsky.social article on where we are ten years post-Paris is FALSE.
Global emissions were at an all-time high in 2024.
As it stands this claim is misinformation. They need to issue a correction!
Global emissions were at an all-time high in 2024.
As it stands this claim is misinformation. They need to issue a correction!
Reposted by Gregor Semieniuk
But windfall profits flow upward: in 2022, half of record fossil-fuel profits went to the richest 1%; only 1% reached the bottom half.
Link: www.sciencedirect.com/science/arti...
Link: www.sciencedirect.com/science/arti...
November 6, 2025 at 2:23 PM
But windfall profits flow upward: in 2022, half of record fossil-fuel profits went to the richest 1%; only 1% reached the bottom half.
Link: www.sciencedirect.com/science/arti...
Link: www.sciencedirect.com/science/arti...
Reposted by Gregor Semieniuk
If guaranteeing essentials sounds radical in 2025, it speaks to how far we’ve drifted from democracy’s core promise. Markets will not save democracy.
My new piece for @theguardian.com:
www.theguardian.com/commentisfre...
My new piece for @theguardian.com:
www.theguardian.com/commentisfre...
Zohran Mamdani shows how Democrats can defeat authoritarians like Trump | Isabella Weber
Democrats have two choices: fight to make life affordable again for ordinary people or watch voters embrace authoritarians
www.theguardian.com
November 6, 2025 at 2:23 PM
If guaranteeing essentials sounds radical in 2025, it speaks to how far we’ve drifted from democracy’s core promise. Markets will not save democracy.
My new piece for @theguardian.com:
www.theguardian.com/commentisfre...
My new piece for @theguardian.com:
www.theguardian.com/commentisfre...
Reposted by Gregor Semieniuk
I think we should aim for something better than "not extinct"
www.nytimes.com/2025/10/28/c...
www.nytimes.com/2025/10/28/c...
Bill Gates Says Climate Change ‘Will Not Lead to Humanity’s Demise’
www.nytimes.com
October 28, 2025 at 6:10 PM
I think we should aim for something better than "not extinct"
www.nytimes.com/2025/10/28/c...
www.nytimes.com/2025/10/28/c...
Reposted by Gregor Semieniuk
TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-...
🧵
🧵
The official home of the Python Programming Language
www.python.org
October 27, 2025 at 2:47 PM
TLDR; The PSF has made the decision to put our community and our shared diversity, equity, and inclusion values ahead of seeking $1.5M in new revenue. Please read and share. pyfound.blogspot.com/2025/10/NSF-...
🧵
🧵
Reposted by Gregor Semieniuk
Killer chart from Gregor Semeiniuk and co-authors showing where in the income distribution pandemic windfall oil profits ended up.
October 24, 2025 at 4:30 PM
Killer chart from Gregor Semeiniuk and co-authors showing where in the income distribution pandemic windfall oil profits ended up.
Reposted by Gregor Semieniuk
Wenn ihr heute von steigenden, springenden oder zulegenden #Öl-Preisen lest, denkt immer an diese Graphik und die in dieser visualisierten krassen Profite, die 2022ff. im Kontext der Energiekrise gemacht wurden.
#Profit-Inflation
👇👇👇
#Profit-Inflation
👇👇👇
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 23, 2025 at 9:01 AM
Wenn ihr heute von steigenden, springenden oder zulegenden #Öl-Preisen lest, denkt immer an diese Graphik und die in dieser visualisierten krassen Profite, die 2022ff. im Kontext der Energiekrise gemacht wurden.
#Profit-Inflation
👇👇👇
#Profit-Inflation
👇👇👇
Reposted by Gregor Semieniuk
Even more of a case for a carbon tax on investment income:
bsky.app/profile/greg...
bsky.app/profile/greg...
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 20, 2025 at 4:30 PM
Even more of a case for a carbon tax on investment income:
bsky.app/profile/greg...
bsky.app/profile/greg...
Reposted by Gregor Semieniuk
🚨 OUT NOW! Our new @science.org study led by @kohrathefog.bsky.social is the first to comprehensively quantify the health impacts of and inequities in outdoor air pollution exposure across all stages of the US oil and gas lifecycle: extraction ➡️ transport/storage ➡️ refining/processing ➡️ end-use. 🧵
August 24, 2025 at 10:30 PM
🚨 OUT NOW! Our new @science.org study led by @kohrathefog.bsky.social is the first to comprehensively quantify the health impacts of and inequities in outdoor air pollution exposure across all stages of the US oil and gas lifecycle: extraction ➡️ transport/storage ➡️ refining/processing ➡️ end-use. 🧵
Reposted by Gregor Semieniuk
Good illustration of the need to look at the relative price changes that are happening in parallel with a "general" rise in inflation. The windfall gains associated with rising fossil fuel prices had a huge impact on inflation outcomes at different points in the income distribution.
Fossil fuel profits also sharply increase inflation inequality.
Incremental 2022 fossil fuel profits over 2021 compensate several percent of 2022 inflation for the richest groups (triangles and squares), dwarfing differences in inflation due to differing consumption baskets (disks). 10/
Incremental 2022 fossil fuel profits over 2021 compensate several percent of 2022 inflation for the richest groups (triangles and squares), dwarfing differences in inflation due to differing consumption baskets (disks). 10/
October 8, 2025 at 8:02 PM
Good illustration of the need to look at the relative price changes that are happening in parallel with a "general" rise in inflation. The windfall gains associated with rising fossil fuel prices had a huge impact on inflation outcomes at different points in the income distribution.
Reposted by Gregor Semieniuk
Very important paper by @gregorsemieniuk.bsky.social that shows, as I have argued, that tax policy is climate policy. We cannot phaseout #fossilfuels without attacking their wealth.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
October 9, 2025 at 1:21 PM
Very important paper by @gregorsemieniuk.bsky.social that shows, as I have argued, that tax policy is climate policy. We cannot phaseout #fossilfuels without attacking their wealth.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Reposted by Gregor Semieniuk
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 8, 2025 at 4:50 PM
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
Reposted by Gregor Semieniuk
Who benefitted from energy price shocks - thread
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 8, 2025 at 6:12 PM
Who benefitted from energy price shocks - thread
Reposted by Gregor Semieniuk
"The incremental U.S. fossil-fuel profits in 2022 relative to 2021 were enough to increase the disposable income of the wealthiest Americans by several percent and compensate a substantial part of their purchasing power loss from inflation that year, thereby exacerbating inflation inequality. "
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 8, 2025 at 5:55 PM
"The incremental U.S. fossil-fuel profits in 2022 relative to 2021 were enough to increase the disposable income of the wealthiest Americans by several percent and compensate a substantial part of their purchasing power loss from inflation that year, thereby exacerbating inflation inequality. "
Reposted by Gregor Semieniuk
📢 must-read new paper! 👇
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 8, 2025 at 5:28 PM
📢 must-read new paper! 👇
Reposted by Gregor Semieniuk
Fantastic paper. Data by sector, geography, investor entity & distributional impact (in terms of wealth, race, education).
@gregorsemieniuk.bsky.social's conclusion below: "taxing incremental 2022 US profits as excess could've doubled clean energy investments or paid each US household $1,715".
@gregorsemieniuk.bsky.social's conclusion below: "taxing incremental 2022 US profits as excess could've doubled clean energy investments or paid each US household $1,715".
🚨NEW PAPER🚨
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
We all know the 2022 energy price shock fueled the cost of living crisis. It also caused a profit bonanza for the very rich. We show the US reaped the largest profits ($377bn) of any country. 50% went to the richest 1%, only 1% to the bottom 50%. A🧵 www.sciencedirect.com/science/arti...
October 8, 2025 at 5:06 PM
Fantastic paper. Data by sector, geography, investor entity & distributional impact (in terms of wealth, race, education).
@gregorsemieniuk.bsky.social's conclusion below: "taxing incremental 2022 US profits as excess could've doubled clean energy investments or paid each US household $1,715".
@gregorsemieniuk.bsky.social's conclusion below: "taxing incremental 2022 US profits as excess could've doubled clean energy investments or paid each US household $1,715".