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Marius Brülhart @mariusbrulhart.bsky.social · 4d

An early Christmas gift 👇

Thanks, @davidragrawal.bsky.social, Jim Poterba and @omzidar.bsky.social, for leading this project so successfully.

It was an honor and a pleasure to contribute a chapter on corporate tax competition among the Swiss cantons.

David R. Agrawal @davidragrawal.bsky.social · 4d

Excited to receive our new 536 page book on tax competition and coordination in the mail today:

"Policy Responses to Tax Competition" (w/ Poterba &
@omzidar.bsky.social)

I know everyone is looking forward to order it here:
amazon.com/-/es/Respons...

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David R. Agrawal @davidragrawal.bsky.social · 4d

Thanks to our editor at @uchicagopress.bsky.social
and all the authors who contributed @jeffreypclemens.bsky.social @stanveuger.bsky.social @s-stantcheva.bsky.social @mariusbrulhart.bsky.social @kurtschmidheiny.bsky.social & many others not on here!

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David R. Agrawal @davidragrawal.bsky.social · 4d

Excited to receive our new 536 page book on tax competition and coordination in the mail today:

"Policy Responses to Tax Competition" (w/ Poterba &
@omzidar.bsky.social)

I know everyone is looking forward to order it here:
amazon.com/-/es/Respons...

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Theoretical Economics @econtheory.bsky.social · Jul 23

Theoretical Economics Volume 20, Issue 3 (July 2025) is now online econtheory.org

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David R. Agrawal @davidragrawal.bsky.social · Apr 15

Last day to submit! Looking forward to seeing you in Berlin!

Georg Thunecke @georgthunecke.bsky.social · Apr 8

🚨 1 week left! 🚨
Working on local public finance or fiscal federalism?
Present your research in Berlin 🇩🇪
📅 July 7–8, 2025
📍 Harnack-Haus
🎙️ Keynote: @davidragrawal.bsky.social (UC Irvine)
✈️ Travel & stay covered
📩 Apply by April 15 → events.tax.mpg.de/event/10/
Please share this! ♻️

Local Public Finance and Fiscal Federalism Around the World

The aim of this conference is to bring together international scholars of all career stages working on topics of local public finance, fiscal federalism, interjurisdictional competition and cooperatio...

events.tax.mpg.de

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Georg Thunecke @georgthunecke.bsky.social · Apr 8

🚨 1 week left! 🚨
Working on local public finance or fiscal federalism?
Present your research in Berlin 🇩🇪
📅 July 7–8, 2025
📍 Harnack-Haus
🎙️ Keynote: @davidragrawal.bsky.social (UC Irvine)
✈️ Travel & stay covered
📩 Apply by April 15 → events.tax.mpg.de/event/10/
Please share this! ♻️

Local Public Finance and Fiscal Federalism Around the World

The aim of this conference is to bring together international scholars of all career stages working on topics of local public finance, fiscal federalism, interjurisdictional competition and cooperatio...

events.tax.mpg.de

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David R. Agrawal @davidragrawal.bsky.social · Mar 25

Local public economics and federalism are important!

I'm excited to return to Berlin to give the keynote at this conference on local public finance issues around the world.

Travel funding available!

Submit your local PF papers here:
events.tax.mpg.de/event/10/

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David R. Agrawal @davidragrawal.bsky.social · Feb 20

Excited to serve another term as Editor-in-chief of @itaxjournal.bsky.social with this new fantastic team!

itaxjournal.bsky.social @itaxjournal.bsky.social · Feb 20

📢Announcement (pt.2): We would like to welcome new Editors-in-Chief: Katarzyna Bilicka (@katarzynabilicka.bsky.social), Thiess Buettner and Jing Xing and new Policy Watch Editors: Arun Advani and Philipp Dörrenberg.

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David R. Agrawal @davidragrawal.bsky.social · Feb 20

Thanks to both Ron and Nadine for their service to the public finance community, especially during the crazy pandemic years. I learned a lot & enjoyed working with them over the last four years where submissions to the journal almost doubled!

And follow @itaxjournal.bsky.social which is new here!

itaxjournal.bsky.social @itaxjournal.bsky.social · Feb 20

📢Announcement: At the end of last year, Ronald B. Davies (
@ronbdavies.bsky.social) and Nadine Riedel stepped down as ITAX Editors-in-Chief. We want to thank them for all they did to solidify ITAX's position as one of the leading journals in the field of public economics!

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itaxjournal.bsky.social @itaxjournal.bsky.social · Feb 20

📢Announcement (pt.2): We would like to welcome new Editors-in-Chief: Katarzyna Bilicka (@katarzynabilicka.bsky.social), Thiess Buettner and Jing Xing and new Policy Watch Editors: Arun Advani and Philipp Dörrenberg.

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itaxjournal.bsky.social @itaxjournal.bsky.social · Feb 20

📢Announcement: At the end of last year, Ronald B. Davies (
@ronbdavies.bsky.social) and Nadine Riedel stepped down as ITAX Editors-in-Chief. We want to thank them for all they did to solidify ITAX's position as one of the leading journals in the field of public economics!

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David R. Agrawal @davidragrawal.bsky.social · Jan 31

Elasticities are endogenous and government choices. Eg they can be influenced by sale or things like zoning. We wanted to add this to the model but will save for future work

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David R. Agrawal @davidragrawal.bsky.social · Jan 31

An interesting question is where the optimal borders are in light of this heterogeneity

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David R. Agrawal @davidragrawal.bsky.social · Jan 30

Thanks! Can you say more about the model application with SALT?

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Spatial tax competition models assume people are uniformly distributed in jurisdictions, but what if jurisdictions differ in how their populations are distributed?

See my paper "Sensitivity versus size: Implications for tax competition" w/ Bagh and Mardan in
@econtheory.bsky.social

Thread:

Theoretical Economics @econtheory.bsky.social · Jan 28

Extending the 2-country tax competition framework with cross-border shopping to 3 countries and a general spatial population distribution, the population distribution within countries matters for the order of tax rates in equilibrium. @DavidRAgrawal econtheory.org/ojs/index.ph...

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Check out the paper here:
econtheory.org/ojs/index.ph...

econtheory.org

David R. Agrawal @davidragrawal.bsky.social · Jan 28

We are grateful to @florianscheuer.bsky.social for his extensive comments as editor and for the three excellent referees he selected, especially Referee B whose reports were some of the most insightful I have ever seen.

Highly recommend the process at
@econtheory.bsky.social

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

In ongoing work, we verify our theoretical commodity tax result empirically. That paper is coming soon!

Finally, we discussion how our results might be applicable to spatial price competition with multiple firms, to spatial voting models, or to border effects in trade.

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Capital competition models with two jurisdictions place assumptions on moving costs.

With three jurisdictions, the distribution of moving costs for firms plays the same role as population density.

Again bigger jurisdiction can set lower rates!

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Profit shifting models often have 2 jurisdictions and quadratic costs.

We generalize to three jurisdictions with a more general convex cost function for profit shifting.

The higher derivatives of the cost function play the same role as population density.

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Finally, we show the result generalizes beyond spatial commodity tax competition to models of profit taxation (Keen and Konrad ) or capital taxation (Mongrain and
Wilson).

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

And we go even further to show there exist a distribution function and jurisdiction boundaries such that the complete ordering of tax rates reverses from the rankings of populations.

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

In other words, the denominators of the optimal tax rates are now different!

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Classic result can be overturned b/c with 3 jurisdictions, a jurisdiction can attract cross-border shoppers from 2—instead of 1 jurisdiction

Thus, tax base sensitivities are no longer equal

Elasticities in Ramsey rule depend on size and on the average base change at 2 borders!

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

We conclude that we can find a population jurisdiction with three jurisdictions such that P1 > P2 and T1 < T2.

That is, a smaller jurisdiction can set a higher
tax rate than the next largest jurisdiction.

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Then show if the border between 1/2 makes 1 smaller, T1 - T2 is decreasing.

Thus, reduce this border a small amount such that
T1 < T2 > T3

But under the perturbed population distribution we have P1 > P2 > P3.

QED (many complex details in paper)

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Small perturbation results in P1 > P2 > P3

Although the initial equilibrium satisfied the assumptions for existence, the perturbed density may not.

But we prove the equilibrium of the original unperturbed game is also an equilibrium to a perturbed game! T1 = T2 > T3

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

Finally, we generalize this result for an arbitrary f(x) and asymmetric jurisdictions.

Proof strategy:

Start from a Nash eq where population P1 = P2 > P3 and taxes are T1 = T2 > T3

Make a specific population perturbation that changes populations but leaves tax bases unchanged

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

We first prove smaller places set higher rates using a simple example:

Population distribution is triangular.

2 jurisdictions are symmetric and have a common border at the lowest density point.

Then for a certain range of their lengths, we get

little t > big T despite p < P

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David R. Agrawal @davidragrawal.bsky.social · Jan 28

First we need to show an equilibrium exists and is unique.

If f(x) is log-concave and satisfies one other mild condition, then the game is supermodular and existence follows.

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