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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · 2d

We are happy to welcome @isabelmicom.bsky.social this Friday at EUTO!

EU Tax Observatory @taxobservatory.bsky.social · 2d

How does inheritance tax avoidance work through the family firm? 🤔

Join @isabelmico.bsky.social (Economist at the @Bank of Spain) for our next #LunchSeminar to explore this question.

🗓️ October 10, 2025 | 12pm (CET)
📍 @pse.bsky.social & online

🔗 Registration: lnkd.in/dkpC68XU

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · 13d

Join us tomorrow !

EU Tax Observatory @taxobservatory.bsky.social · 16d

This week's #LunchSeminar with Laurence Jacquet (‪ @cy-univ.bsky.social ) will focus on production regulation principles and tax reforms.

🗓️ September 26 | 12 PM (CET)
📍 Join us in person at @pse.bsky.social or online via Zoom

🔗 Register here: us06web.zoom.us/meeting/regi...

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · 13d

Congrats Kenza !! 💐

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Reposted by Ninon Moreau-Kastler

Kenza Elass @kenza-elass.bsky.social · 13d

I’m truly honored to receive the 2025 Etta Chiuri Prize for my JMP🏆

Many thanks to the jury, to @paolaprofeta.bsky.social for creating such a supportive & stimulating environment at the @axagenderlab.bsky.social of Bocconi to develop my research & to @garcia-penalosa.bsky.social for her guidance🙏

AXA Research Lab on Gender Equality @axagenderlab.bsky.social · 14d

🎉 Congratulations to @kenza-elass.bsky.social, our postdoc at @axagenderlab.bsky.social @bocconi.bsky.social, on winning the 2025 Etta Chiuri Prize, for her JMP 🏆

This prize honors an outstanding unpublished paper by an author under 40 👏

Info: www.siepweb.it/siep/wp/en/e...

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Reposted by Ninon Moreau-Kastler

EU Tax Observatory @taxobservatory.bsky.social · 14d

1/6 Does requiring stronger due diligence for foreign sourcing work? 🤔

Our latest policy note by @nmoreaukastler.bsky.social and @giuliavaraschin.bsky.social looks at the US experience with conflict minerals 🧵

Read the full note: www.taxobservatory.eu/publication/...

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · 23d

Join us online for the first seminar of this academic year!

EU Tax Observatory @taxobservatory.bsky.social · 23d

Guess what? EUTO #LunchSeminar is back! 🚀

🎙️Join Margarita López Forero ( @banquedefrance-off.bsky.social ) for an interesting discussion on offshoring wage inequality in tax havens.

🗓️ September 19 | 12pm (CET)
📍 @pse.bsky.social & Zoom

🔗 Register here: us06web.zoom.us/meeting/regi...

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 27

Very happy to have presented my work and met a great research group in Ingolstadt !

Dominika Langenmayr @dlangenmayr.bsky.social · May 26

Thank you @nmoreaukastler.bsky.social (@taxobservatory.bsky.social @pse.bsky.social ) for a great presentation of your paper "No blood in my mobile: regulating foreign suppliers" and generally for visiting us in Ingolstadt!

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Reposted by Ninon Moreau-Kastler

Ondine Berland @ondineberland.bsky.social · May 14

Our latest research on the Gender Gap in Carbon Footprints is out 🚨

Marion Leroutier @leroutierm.bsky.social · May 14

In this new paper joint with @ondineberland.bsky.social, featured in The Guardian, we show that :
-women in France emit 26% less CO₂ than men from food & transpor
- the gap isn’t just down to biology or labor market differences.

Thread will follow, see full paper here:
www.lse.ac.uk/granthaminst...

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

… Stata command coming soon ! 👩‍💻

9/9

#EconBluesky #Econometrics #Differenceindifferences

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

Proposed counterfactual estimator to recover RoR:
1. Estimate FE on untreated units
2. Predict counterfactual outcomes for treated
3. Compute average effect in levels
4. Scale by average counterfactual outcome

Matches RoR interpretation; generalizes 2×2 PPML.

Event study simulation:

8/

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

Aggregating smaller scale correct RoRs recovers a different intermediate quantity:
* \= original RoR with heterogeneity (don’t compare to PPML)
* Interpretation depends on economic meaning of cohorts
* Divergence with PPML and log-OLS depends on correlation of outcomes (y) & treatment effects (δ)
7/

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

🖼️ Imagine firms A & B in regions 1 & 2, firm C also in region 1. Employment in C rises from 2 to 3.

* % change of the average & avg % change: +60%, +66%.

But one could also be interested in avg % change by region: +50%.

No reason for these to coincide—distinct quantities under heterogeneity.
6/

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

💡To solve this, linear robust DiD estimators aggregate cohort-level correct treatment effects estimates.

🤔 But I show this approach has problems in non-linear (PPML) settings:
Different averages yield distinct targets, complicating interpretation and comparability.

5/

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

What happens with staggered treatment and heterogeneous treatment effect?

In a simple example (N=2, T=3), I show that TWFE PPML is biased (similarly to TWFE OLS). It "downscales" treatment effects, analog to the negative weights problem.

4/

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

Ex: Take firms A & B and their change in employment.

Pre-treatment: A=1, B=2 employees.

Post-treatment: +1 each.

* The average % change: (100%+50%)/2 = +75% (≈TWFE log-OLS)

* The change of average employment: ((2+3)-(1+2))/(1+2)=+66% (=TWFE PPML)

3/

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

Reminder: in the 2×2 settings with treatment heterogeneity, TWFE PPML estimates the multiplicative DiD, or Ratio-of-Ratios (RoR), targeting % change of average in treated group.

TWFE log-OLS instead captures the DiD in log points, approximating average % unit changes (for small effects).

2/

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · May 7

🚨 New staggered DiD paper for PPML

Want to estimate multiplicative DiD with PPML under staggered treatment? My new paper explores key issues and solutions: www.taxobservatory.eu/publication/... #EconBluesky #Econometrics

🧶 1/

Proportional Treatment Effects in Staggered Settings: An Approach for Poisson Pseudo-Maximum Likelihood - Eutax

www.taxobservatory.eu

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Reposted by Ninon Moreau-Kastler

Matt Collin @mattcollin.bsky.social · Apr 11

DEADLINE TONIGHT!

Matt Collin @mattcollin.bsky.social · Mar 14

🚨New postdoc job alert 🚨

We are recruiting a two year postdoc here at @taxobservatory.bsky.social in Paris - to start this September

The successful candidate will join our program on Illicit Financial Flows and Real Estate

More info below 👇

www.taxobservatory.eu/postdoctoral...

Postdoctoral fellow (Illicit Financial Flows) - Eutax

www.taxobservatory.eu

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Reposted by Ninon Moreau-Kastler

EU Tax Observatory @taxobservatory.bsky.social · Mar 26

1/ 🚨 NEW: 46% of the pesticides embedded in EU agricultural consumption come from imports—despite imports making up just 17% of total consumption. Many of these include substances banned in the EU 🇪🇺

This regulatory gap fuels leakage effects and hurts EU competitiveness 🧵👇

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · Mar 17

Looking for a post-doc position and interested in IFF related topics? Join a great team at @taxobservatory.bsky.social and come work with the Illicit Financial Flows program! www.taxobservatory.eu/postdoctoral...

Postdoctoral fellow (Illicit Financial Flows) - Eutax

www.taxobservatory.eu

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Reposted by Ninon Moreau-Kastler

Elisa Mougin @elisamougin.bsky.social · Feb 18

A few days left to submit your application for this great event! ⏳
Reach out to us if you have any questions ✨ We look forward to seeing you in Lyon!

CERGIC @cergic.bsky.social · Feb 18

Don't forget, there are only a few days left to apply for the "Lyon Summer School in Empirical Research Methods" at @ensdelyon.bsky.social!

Deadline: 28 February 2025.

bsky.app/profile/cerg...

CERGIC @cergic.bsky.social · Jan 15

We're glad to announce that applications are now open for the very first "Lyon Summer School in Empirical Research Methods" at @ensdelyon.bsky.social !

More information below:

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Ninon Moreau-Kastler @nmoreaukastler.bsky.social · Jan 17

Join us in two weeks for the next Offshore Talk with @quinnslobodian.com !

EU Tax Observatory @taxobservatory.bsky.social · Jan 15

What happens when market radicals dream of a world without democracy?

🎙️ Join #TheOffshoreTalks on Jan 31 with @quinnslobodian.com to explore how free marketeers bypass democracy to create zones of unrestrained capitalism.

🕧 12:30 CET 📍@pse.bsky.social

More: www.taxobservatory.eu/event/crack-...

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Reposted by Ninon Moreau-Kastler

Centre for Economics at Paris-Saclay — CEPS @ceparis-saclay.bsky.social · Nov 29

📌Call for Papers | Submissions: Dec 2-Feb 7📌

Submissions for the AFSE Annual Congress (June 2–4) open on Monday! ➡️ afse2025.sciencesconf.org/resource/pag...

We are thrilled to announce 3 exciting keynotes: @emilynix100.bsky.social, Anne Perrot & @t8el.bsky.social.

Plus 5 roundtables ⬇️ #econsky

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Reposted by Ninon Moreau-Kastler

Marion Leroutier @leroutierm.bsky.social · Nov 25

Excited to return to CIRED this Wednesday to present recent work with @ondineberland.bsky.social on the gender gap in carbon footprint -- can you guess the direction of the gap ;)?

CIRED @cired.bsky.social · Nov 25

⛩️ Wednesday 27, CIRED Seminar - MArion Leroutier (@leroutierm.bsky.social) (CREST-ENSAE): The Gender Gap in Carbon Footprint
👉🏼https://www.centre-cired.fr/seminaire-du-cired-marion-leroutier/

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Reposted by Ninon Moreau-Kastler

EU Tax Observatory @taxobservatory.bsky.social · Nov 25

📢 Join us for our next #LunchSeminar with @arthurgzouic.bsky.social ( @cnrs.bsky.social, @pse.bsky.social ) discussing: "Taxing Wealth in the Presence of Liquidity Constraints: Evidence from France".

🗓️ Nov 29 | 12-1 PM CET
📍@pse.bsky.social & online

👉 Register here: us06web.zoom.us/meeting/regi...

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