Martin Peitz

Professor of Economics at University of Mannheim. Most of my tweets are about the (mis)functioning of markets. Some of my other selves sometimes also tweet.

[Martin Peitz @peitz_martin]

Flattering endorsements for the book "The Economics of Platforms: Concepts and Strategy" that @PaulBelleflamme and I wrote. Thank you Ginger Zhe Jin, @joshgans, @MonikaSchnitzer, @ce_tucker, @steve_tadelis, Bruno Jullien, and Julian Wright https://t.co/OiVRgixE8G

[Martin Peitz @peitz_martin]

The owner of X appears to me a threat to democracy and decency. Now he supports the extreme right in Germany. I find this unacceptable. You can find me on Bluesky (@martin-peitz.bsky.social) and LinkedIn.

[Martin Peitz @peitz_martin]

I am happy to speak in Australia on Industrial Policy https://t.co/y0T88e1k4Z

[MaCCIcompetition @MaCCIcomp]

We had @MilliouV @ea_hcc in our Mannheim Competition Policy Forum, speaking about "The 'Failing Firm Defence' in Merger Control"

Check out the recording of her talk on your YouTube channel: https://t.co/DDt9OHL7X2

Also, hit like and subscribe

[Martin Peitz @peitz_martin]

Competition economics and competition law conference next March. Please submit your paper or, even better, a whole session. @MaCCIcomp

[MaCCIcompetition @MaCCIcomp]

🚨 Call for papers 🚨

MaCCI Annual Conference 2025
When: March 20-21, 2025
Where: @ZEW in Mannheim

Submit your competition and innovation-related papers by December 1, 2024!

More info at https://t.co/8yAYlDVJRA

@eu_engage @EconUniMannheim

[Dipartimento Scienze economiche aziendali - Unipd @dSEA_Unipd]

We are honored to host @peitz_martin from @EconUniMannheim for his keynote speech on “Recommendations and Pricing” during the workshop ‘Cybersecurity and Internet Governance’ held today @dSEA_Unipd @UniPadova.

[CRC TR 224 EPoS Bonn-Mannheim @EPoS224]

The fourth pillar of competition law in Germany. Jens-Uwe Franck and @peitz_martin on the sector inquiry with remedies in the amended German Competition Act.

"Germany’s New Competition Tool: Sector Inquiry With Remedies" is now available: https://t.co/myWEaZN8ns

[Martin Peitz @peitz_martin]

Switching back and forth between being a lobbyist and a politician should be incompatible with "European values". It corrupts politics.

[Tommaso Valletti @TomValletti]

We are talking about undisclosed conflicts of academics. What about politicians? Here's Aura Salla, newly elected MEP, asking "not to politicise the DSA" - meaning little regulation. She was employed by Facebook until 2023, and described as "Zuckerberg’s woman in Brussels".

[Tommaso Valletti @TomValletti]

With @tomaso_duso @peitz_martin & Massimo Motta, we comment on Draghi & Telecoms.

Draghi is right on many issues, but he is wrong on telecoms https://t.co/QBYN68Plso via @cepr_org

[CRC TR 224 EPoS Bonn-Mannheim @EPoS224]

Consumer steering by platforms and the role of price parity clauses: Research by @peitz_martin and Anton Sobolev

"Product Recommendations and Price Parity Clauses" is now available: https://t.co/NpVfqyCCP1

[Jakob Schneebacher @j_schneebacher]

The postponed @CMAgovUK and @CityUniLondon workshop on competition economics will now take place 22-23 July.

Topics include labour market power, media plurality, algorithms and more. With @ProfFionasm, @peitz_martin, @DianeCoyle1859, @geografiaumana and many others.

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[MaCCIcompetition @MaCCIcomp]

Did you miss our #MaCCI Law&Econ conference on #merger control? Don't despair.

Videos of the keynotes by @Sherman1890, Giorgio Monti @TILEC1, and Carl Shapiro @UCBerkeley are now online.

https://t.co/x1Z80qjg1r

Don't forget to subscribe to the YT channel.

#econtwitter

[MaCCIcompetition @MaCCIcomp]

A warm welcome from @peitz_martin to the MaCCI/JRC Digital Economics Workshop!

A short but intense program: DSA and the Media, Enforcement of the DMA, and the DSA and access to data.

[MaCCIcompetition @MaCCIcomp]

Find more information, including the program, here:

https://t.co/PHjjm4Pw4Y

[Martin Peitz @peitz_martin]

Great conference organized by Jens-Uwe Franck, @volker_nocke, and Nicolas Schutz @MaCCIcomp

[MaCCIcompetition @MaCCIcomp]

Today's keynote speakers at this year's Law & Economics Conference on mergers.

Giorgio Monti @TilburgU @TILEC1 @eu_engage
Carl Shapiro @UCBerkeley

Thanks!!!

[CRC TR 224 EPoS Bonn-Mannheim @EPoS224]

Massimo Motta, @volker_nocke, and @peitz_martin on how to update merger control in response to geopolitical risks.
"Geopolitical Risks and Prudential Merger Control" is now available: https://t.co/FZ8n6D84OX

[Martin Peitz @peitz_martin]

MaCCI Summer Institute in Competition Policy @MaCCIcomp with great economists. This year in beautiful Annweiler am Trifels.

[Luís Cabral @luismbcabral]

Spending the week in Annweiler, courtesy of MaCCI (The Mannheim Centre for Competition and Innovation). Nearby you can see the ruins of Trifels Castle, where Richard the Lionheart was once imprisoned. @peitz_martin @volker_nocke @EconSchutz

[emanuele tarantino @PonteaEma]

The micro group at Luiss is growing! The Department of Economics has an open position for an associate professor (DEF-ASSOC-10/2024), with an eye on theory and applied theory candidates. Deadline June 20th.
https://t.co/iewdLgFBns

[Martin Peitz @peitz_martin]

It is good to recall that Birgit Grodal was a great inspiration for and supporter of young researchers. This was my experience. From what I see as an old researcher, this also applies to my colleague @TertiltMichele

[EEA @EEANews]

Huge congratulations to Michèle Tertilt @TertiltMichele @EconUniMannheim who has been given the 2024 Birgit Grodal Award.
Full announcement: https://t.co/9Bcq70nw7f

[EEA @EEANews]

Huge congratulations to Michèle Tertilt @TertiltMichele @EconUniMannheim who has been given the 2024 Birgit Grodal Award.
Full announcement: https://t.co/9Bcq70nw7f

[CRC TR 224 EPoS Bonn-Mannheim @EPoS224]

"Biased Recommendations and Differentially Informed Consumers" by @peitz_martin and Anton Sobolev: A price-setting monopolist biases its purchase recommendations when some consumers are ex ante better informed about their valuation than others.