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Romain Fillon

@romainfillon.bsky.social
489 followers 378 following 50 posts

Environmental Economist romainfillon.github.io

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Edouard Pignede @epignede.bsky.social · 29/06/2026
I am delighted that my thesis, "The poverty-environment trap: Climate change, natural resources and population dynamics in Sub-Saharan Africa," has received the Prize of the Association Française de Science Economique (AFSE)!
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David Dufresne @davduf.net · 17/04/2026
Grasset : « Nous, éditeurs, dénonçons une guerre culturelle et idéologique menée au grand jour » www.lemonde.fr/idees/articl...
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CESifo @cesifo.org · 05/12/2025
Working Paper 🚨 "Climate Shift Uncertainty and Economic Damages" ✍️ @romainfillon.bsky.social @mlinsenmeier.bsky.social @gwagner.com Read the full paper here: 🔗 www.ifo.de/en/cesifo/pu...
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CIRED @cired.bsky.social · 03/11/2025
🏆 Le CIRED est fier d’annoncer que Romain Fillon a reçu le Premier Prix 2025 de la Chancellerie des Universités de Paris pour la meilleure thèse en économie. 👇🏼
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Alain CPR @caplarin.bsky.social · 06/09/2025
Xavier Tytelman : en Ukraine, "93% des attaques russes sont sur des infrastructures civiles" La pétition, lancée par le collectif Sky Shield, a déjà récolté plus de 30.000 signatures. "Sauvons les civils des drones russes, fermons le ciel au-dessus de l'Ukraine" ✍🏻 chng.it/WCKdJkzxdv
radiofrance.fr
Xavier Tytelman : en Ukraine, "93% des attaques russes sont sur des infrastructures civiles"
Alors que la "coalition des volontaires", les alliés de l'Ukraine, se réunit à Paris, une pétition en ligne lance l'idée de verrouiller le ciel ukrainien, de mettre en place un bouclier du ciel capabl...
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Romain Fillon @romainfillon.bsky.social · 29/04/2025
Merci beaucoup Céline!
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Romain Fillon @romainfillon.bsky.social · 25/04/2025
Merci beaucoup Marion!
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Romain Fillon @romainfillon.bsky.social · 25/04/2025
Thank you very much Fran!
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Romain Fillon @romainfillon.bsky.social · 25/04/2025
Thank you, Manuel. It's a pleasure working together!
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Romain Fillon @romainfillon.bsky.social · 25/04/2025
Thank you very much Malin! Looking forward to seeing each other again soon.
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Romain Fillon @romainfillon.bsky.social · 24/04/2025
This recognition provides a great opportunity to thank my PhD advisors, my co-authors, and my colleagues from CIRED and Paris-Saclay Applied Economics at Université Paris-Saclay, France. I would also like to thank EAERE for this great distinction.
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Romain Fillon @romainfillon.bsky.social · 24/04/2025
Currently working as a consultant at the World Bank, 𝐈 𝐚𝐦 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐚𝐧 𝐚𝐜𝐚𝐝𝐞𝐦𝐢𝐜 𝐩𝐨𝐬𝐢𝐭𝐢𝐨𝐧 𝐢𝐧 𝐋𝐨𝐧𝐝𝐨𝐧 𝐨𝐫 𝐧𝐞𝐚𝐫𝐛𝐲, 𝐬𝐭𝐚𝐫𝐭𝐢𝐧𝐠 𝐟𝐫𝐨𝐦 𝐅𝐚𝐥𝐥 𝟐𝟎𝟐𝟓. Please spread the word!
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Romain Fillon @romainfillon.bsky.social · 24/04/2025
🎉 I am delighted to be a co-recipient of the 2025 Award for Best Doctoral Dissertation in Environmental and Resource Economics from the European Association of Environmental and Resource Economists (EAERE). I am flattered to be named alongside Filippo Pavanello and Rik Rozendaal.
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Romain Fillon @romainfillon.bsky.social · 24/04/2025
Thank you for the continued support simon!
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Romain Fillon @romainfillon.bsky.social · 24/04/2025
Thank you Philippe!
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Reposted by Romain Fillon
Gabriel Zucman @gabrielzucman.bsky.social · 16/04/2025
C’est la petite musique qui monte : en ces temps de disette budgétaire il n’y aurait pas grand-chose à récupérer en s’attaquant à la fraude fiscale ; l’argent se trouverait plutôt du côté de la fraude sociale. Malheureusement cela ne repose sur rien. Petit état des savoirs sur le sujet 🧵
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Timothy Snyder @timothysnyder.bsky.social · 06/04/2025
The obvious move, very much in their interest, and in the interest of democracy itself.
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Alexis Licht @alexislicht.bsky.social · 07/03/2025
Dear US colleagues, In response to the Trump administration, my university @univ-amu.fr is setting up a new program dedicated to welcoming American scientists wishing to pursue their work in France. There are several M$ in the budget. www.univ-amu.fr/en/public/ac...
univ-amu.fr
Safe Place For Science: Aix Marseille Université ready to welcome American scientists | Aix Marseille Université
In a context where some scientists in the United States may feel threatened or hindered in their research, our university is announcing the launch of the Safe Place For Science program, dedicated to w...
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Reposted by Romain Fillon
Grand Continent @grandcontinent.bsky.social · 19/02/2025
Mario Draghi a prononcé hier un discours fondateur. Ce manifeste européen pour l’ère Trump part d’un impératif—«nous devons être optimistes». Et d’un cap—«il devient évident que nous devons agir comme si nous étions un seul État.» Nous le traduisons. legrandcontinent.eu/fr/2025/02/1...
legrandcontinent.eu
Que faire dans l’ère Trump ? Le manifeste européen de Mario Draghi | Le Grand Continent
Après les paroles de Sergio Mattarella contre « la vassalisation heureuse », l’ancien président du Conseil italien et banquier central a prononcé hier à Bruxelles un discours clef : un manifeste europ...
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Edouard Pignede @epignede.bsky.social · 08/01/2025
The first chapter of my PhD entitled **Who carries the burden of climate change? Heterogeneous impact of droughts in sub-Saharan Africa** has just been published in the *American Journal of Agricultural Economics*. doi.org/10.1111/ajae... Here is a summary of my findings!
doi.org
Who carries the burden of climate change? Heterogeneous impact of droughts in sub‐Saharan Africa
Droughts can dramatically affect economic activities, especially in developing countries where more than half the labor force is in the agricultural sector. This paper highlights the causal impact of...
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Romain Fillon @romainfillon.bsky.social · 10/12/2024
Merci beaucoup Philippe!!
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CIRED @cired.bsky.social · 09/12/2024
🎓 [PhD defense] Congratulations to @romainfillon.bsky.social who has just defended his thesis “Climate Uncertainties” under the supervision of Céline Guivarch (ENPC, CIRED) and Vincent Martinet (INRAE, Université Paris-Saclay). 👉🏼https://www.centre-cired.fr/soutenance-de-these-romain-fillon/
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CIRED @cired.bsky.social · 27/11/2024
🎓 [PhD defense] Congratulations to @simonjean.bsky.social, who defended yesterday his thesis entitled “Modeling the biodiversity crisis: the roles of space and strategic behavior in bioeconomic modeling”, under the supervision of Lauriane Mouysset and Christopher Costello (@ucsb.bsky.social).
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Romain Fillon @romainfillon.bsky.social · 22/11/2024
Intéressé! Merci!!
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Reposted by Romain Fillon
Romain Fillon @romainfillon.bsky.social · 12/11/2024
Hi, I’m on the job market (and new to Bluesky!). I’m a 4th-year PhD candidate in Economics at Université Paris-Saclay, France (CIRED & PSAE), specializing in climate uncertainties. How does regional economic activity shape climate impacts? In my JMP, I explore this question. A thread! [1/10]
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Romain Fillon @romainfillon.bsky.social · 22/11/2024
#EconJMP
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Romain Fillon @romainfillon.bsky.social · 22/11/2024
@mikmeh.bsky.social!
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
🌍 Job market time! I am a 4th-year PhD candidate in Economics at Université Paris-Saclay, France (CIRED & PSAE), specializing in climate uncertainties. How should climate subsystems (CS) be accounted for? In JMP 2, with amazing Pr. Céline Guivarch, we explore this question. A 🧵! ⬇️
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
𝐉𝐨𝐛 𝐌𝐚𝐫𝐤𝐞𝐭 𝐑𝐞𝐜𝐚𝐩 I’m on the job market! I’m a 4th-year PhD candidate at Université Paris-Saclay, France (CIRED & PSAE), focusing on climate uncertainties. Here’s a quick overview of my research journey! 🧵
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
#econsky #econtwitter #environmentaleconomics #econjobmarket
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
haha 🏀! Thank you for your continuous and kind support, Philippe.
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
[7/7] These past 3 years have been exciting, and I’m eager to see what’s next! I hope to assess climate impacts by combining risk (JMP 2) and spatial dimensions (JMP 1), e.g. evaluating place-based policies against env. risks. Stay tuned & contact me for possible collabs!
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
[6/7] Thanks to Fulbright France, I spent 5 great months at Columbia University under ideal conditions! 📉 Alongside @mlinsenmeier.bsky.social & @gwagner.com, we investigated how spatial and temporal aggregation of temperature data can lead to underestimated climate damage projections.
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
[5/7] 🌱 I was lucky to work with Dr. Taconet & Pr. Guivarch, showing that temporal risk aversion significantly raises the social cost of carbon (SCC) in scenarios with catastrophic tipping risks 🌡️. This work is published in @jeem-econ.bsky.social. www.sciencedirect.com/science/arti...
sciencedirect.com
Optimal climate policy under tipping risk and temporal risk aversion
We investigate the implications of absolute risk aversion with respect to intertemporal utility, i.e. temporal risk aversion, in the presence of a sty…
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
[4/7] 🌳 In JMP 2, Pr. Céline Guivarch and I explore how dynamic interactions between global climate risk and climate subsystems’ idiosyncratic risk shape global climate policy and regional subsystem management—using the Amazon rainforest as a case study. bsky.app/profile/did:...
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
[3/7] 🌐 In JMP 1, I assess how biophysical channels (e.g. evapotranspiration) affect climate impacts on welfare. I take the model to the data at 1° gridded global scale along SSP2-4.5. bsky.app/profile/did:...
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
[2/7] I study climate uncertainties across three key dimensions—time, risk, and space—and their interactions. Using (1) dynamic spatial and (2) stochastic climate-economy models, I analyze how these uncertainties shape welfare outcomes.
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Romain Fillon @romainfillon.bsky.social · 14/11/2024
𝐉𝐨𝐛 𝐌𝐚𝐫𝐤𝐞𝐭 𝐑𝐞𝐜𝐚𝐩 I’m on the job market! I’m a 4th-year PhD candidate at Université Paris-Saclay, France (CIRED & PSAE), focusing on climate uncertainties. Here’s a quick overview of my research journey! 🧵
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
Thanks for the attention! If you are curious about my other JMP on climate subsystems, please check this thread: bsky.app/profile/roma...
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
This work builds on/might be of interest to @moritzdrupp.bsky.social, @araujocrrafael.bsky.social, @gwagner.com, @allanhsiao.bsky.social, among others, and others I did not find on this platform yet!
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
#EconTwitter #EnvironmentalEconomists #EconJobMarket
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[14/14] Today’s thread covers JMP 2: a dynamic stochastic model to answer normative questions. Yesterday, I presented JMP 1: a dynamic spatial equilibrium model to evaluate impacts! bsky.app/profile/roma... Tomorrow, I will introduce my broader research agenda. Stay tuned!
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[13/14] This work can be extended to other (interconnected) CS. 🔴 Estimations for channel 1️⃣ could be improved with a stylized stochastic & geophysical modelling! 🔴 Policy estimates should go beyond channel 1️⃣! More in the paper: romainfillon.github.io/files/JMP_ri...
romainfillon.github.io
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[12/14] 🅑 Amazon’ endogenous dynamics implies a SCDS that is worth 16% of the standard stochastic SCC. 🅒 These results imply that a 24% increase in the marginal value of a tCO2 stored in the rainforest should be applied in local cost-benefit analysis of deforestation.
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[11/14] 2 key policy results: 🅐 Amazon’ endogenous dynamics implies a 15% risk premium on the social cost of carbon (SCC) at the global scale. This money could be leveraged to fund REDD+ mechanisms or Lula’s Amazon Fund.
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[10/14] Ⓒ We provide a stylized calibration of CS’ dynamics, that go beyond direct impacts from deforestation (e.g. degradation, stochastic droughts, vegetation-rainfall feedbacks). For illustration, we simulate below the carbon losses along (unoptimized) SSP.
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[9/14] Ⓑ CS has a tipping risk that is an emerging property of the dynamic system rather than an ad hoc catastrophic probabilities as done in climate-econ models. Also ≠ from dynamic discrete choice methods where a decision in one part of the forest does not impact the rest.
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[8/14] Ⓐ CS is a state variable, with explicit geophysical dynamics, not a proba of catastrophe (yielding feedback on climate, cf. 1️⃣) dependent on temp. as in most climate-econ models, which means that we measure how state of CS at time t influences future state of CS, cf. 2️⃣
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[7/14] 🌳Our quantitative application: a calibrated stochastic climate-economy model of the Amazon rainforest, whose dynamics is fiercely debated. There are 3 key components in our stylized calibration of the Amazon.
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Romain Fillon @romainfillon.bsky.social · 13/11/2024
[6/14] 💡We introduce the social cost of the dynamic subsystem (SCDS): the intertemporal social cost of a marginal decrease in the subsystem’s state today, which captures the extent to which the subsystem’s ability to self-perpetuate changes with a marginal change in its state
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