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Joost Rietveld

@gjrietveld.bsky.social

170 followers 53 following 32 posts

UCL School of Management. Posts about technology, strategy, innovation, platforms, big tech, video games. #platformpapers

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Joost Rietveld @gjrietveld.bsky.social · 1d

What happens when a star player leaves the market? In 'normal' markets you'd expect remaining firms to increase their output and sales, but not so much in platform markets. In the latest #PlatformPapers, what happened to Twitch streamers when Ninja left for Mixer? open.substack.com/pub/platform...

Why Ninja's sudden defection to Mixer made Twitch streamers less productive

open.substack.com

Joost Rietveld @gjrietveld.bsky.social · 15d

In the latest #PlatformPapers blog, @anilrdoshi.com discusses work on #blockbuster projects in the #crowdfunding industry. When a platform has a hit, it triggers additional entry. Entry rates are higher on #Indiegogo, but of higher quality on #Kickstarter. platformpapers.substack.com/p/blockbuste...

Blockbuster Projects Send Waves Hitting All Platforms

Successful crowdfunding projects spill over to competing platforms

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Aug 27

#Blockchain based initiatives (e.g. industry platforms for data sharing) are technologically #decentralized, but often they are owned and exploited by just one or a few companies. Read about this decentralization paradox in the latest #PlatformPapers blog. platformpapers.substack.com/p/the-platfo...

The Platform Governance Paradox

Why industry blockchain platforms struggle with centralization and decentralization

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Aug 7

Thousands of hotels are bringing a lawsuit against Booking.com. At the heart is Booking's "best price" clause. Such clauses can have myriad anticompetitive effects, seller collusion being one of them. Frank Schlutter explains on the #PlatformPapers blog. platformpapers.substack.com/p/the-impact...

The Impact of Platform Most-Favored Nation Clauses on Seller Competition

How platforms benefit when sellers collude on price

platformpapers.substack.com

Reposted by Joost Rietveld

Joshua Gans @joshgans.bsky.social · Jul 21

We are hiring at Rotman Strategy in the Fall. Apply here. jobs.utoronto.ca/job/Toronto-...

Assistant Professor - Strategic Management

Assistant Professor - Strategic Management

jobs.utoronto.ca

Reposted by Joost Rietveld

Ahmadreza Mostajabi @mostajabi.bsky.social · Jul 13

🚨 Thrilled to share our #AOM2025 symposium w/ @aldona.bsky.social & Yongzhi (Alex) Wang on #competition & #regulation in #platforms.
📅 July 29th | 🕝 1:45PM–3:15PM | 📍 Bella Center
More here 👉 www.linkedin.com/posts/mostaj...

Reposted by Joost Rietveld

Brett Hollenbeck @bretthollenbeck.com · Jul 11

🚨Free data alert!! 🚨 Please share.

Large new dataset of Amazon product reviews, including full text and photos and product characteristics, with individual *reviews labeled as fake reviews*.

I believe this is the first publicly available data of this kind.

github.com/bretthollenb...

Joost Rietveld @gjrietveld.bsky.social · May 21

Platform cooperatives are trying to make the sharing economy more equitable by competing against incumbents (e.g., Airbnb, Uber) from the margin. Read about how they try to do this in the latest #PlatformPapers blog here: platformpapers.substack.com/p/platform-c...

Platform Cooperatives Driving Change from the Margins

How to make the sharing economy more equitable

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Apr 29

Digital platforms can help fill institutional voids. In the latest #PlatformPapers blog Aparajita Agarwal and Valentina Assenova discuss research showing how M-Pesa's #mobilemoney platform acts as a steppingstone to #financialinclusion for the unbanked.

Mobile Money as a Steppingstone to Financial Inclusion

How Digital Multisided Platforms Fill Institutional Voids

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Apr 10

In the latest PlatformPapers blog, Ken Wilbur and Davide Proserpio discuss why #advertising is an emergent (but understudied) property of successful digital #platforms. A recommended read! platformpapers.substack.com/p/advertisin...

Advertising is an Emergent Property of Successful Platforms

Plus a public wager

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Mar 20

Now in-press at Academy of Management Perspectives: Hypercontinuous Innovation and Demand-Side Learning: Why Digital Platforms Enjoy Longer and More Expansive Market Leadership Positions joint with Melissa Schilling. journals.aom.org/doi/abs/10.5...

Hypercontinuous Innovation and Demand-Side Learning: Why Digital Platforms Enjoy Longer and More Expansive Market Leadership Positions | Academy of Management Perspectives

Strategy and innovation scholars are increasingly concerned about the market power of successful digital platforms—and so are the authorities tasked with regulating the so-called Big Tech companies. T...

journals.aom.org

Joost Rietveld @gjrietveld.bsky.social · Mar 18

Abnormal performance is a normal feature of many digital platform. Read about research in the context of #Udemy by Kaushik Gala, Andreas Schwab, and Brandon Mueller in the latest #platformpapers blog. platformpapers.substack.com/p/star-entre...

Star Entrepreneurs on Digital Platforms

Abnormal performance is normal in many platforms.

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Feb 27

In the latest #PlatformPapers blog, Paul Belleflamme, Eric Toulemonde and Martin Peitz argue that using market shares to proxy market power for digital platforms is complicated for several reasons. They offer insights to regulators, investors and managers.
platformpapers.substack.com/p/rethinking...

Rethinking Market Power in the Digital Platform Era

Market share isn't everything.

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Feb 4

In the latest #PlatformPapers blog Manav Raj explores the effects of adding competitors in digital platforms. In the context of #Spotify he finds that when a major artist releases an album, related artists see their listenership rise by up to 3% and their overall popularity increase by 1–2%.

Demand Spillovers in Digital Platforms

When it comes to adding competitors, can more be merrier?

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Jan 14

New Platform Papers blog: Reputation Spillover in Digital Markets - When Agencies Help or Hurt Creators platformpapers.substack.com/p/reputation...

Reputation Spillover in Digital Markets

When agencies help or hurt creators

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Jan 2

New paper alert: Hypercontinuous Innovation and Demand-Side Learning: Why Digital Platforms Enjoy Longer and More Expansive Market Leadership Positions - joint with Melissa Schiling and forthcoming in SI on #platformregulation at Academy of Management Perspectives.

(PDF) Hypercontinuous Innovation and Demand-Side Learning: Why Digital Platforms Enjoy Longer and More Expansive Market Leadership Positions

PDF | Strategy and innovation scholars are increasingly concerned about the market power of successful digital platforms—and so are the authorities... | Find, read and cite all the research you need o...

www.researchgate.net

Joost Rietveld @gjrietveld.bsky.social · Dec 17

The 2024 Platform Papers Year in Review is here! What were the top journals for platform competition research? Which were the top-cited papers and the most-read #PlatformPapers blogs? Read all about it and more by following the link. Happy holidays!🎄🎅 platformpapers.substack.com/p/platform-p...

Platform Papers 2024 Year in Review

It’s that time of the year again. Time to look back and reflect.

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Nov 28

What is the hidden cost of platform diversification? Read all about it in the latest Platform Papers blog, expertly written by David Chung, Maggie Zhou, and Christine Choi.

The Hidden Cost of Platform Diversification

When Uber eats its own business, and its competitors’ too

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Jun 25

When it comes to online dating platforms, is more merrier? ❤️ That's the question Jessica Fong tackles in the latest #platformpapers blog. Drawing from an #experiment conducted on a leading #onlinedating #platform she obtained some interesting findings.
platformpapers.substack.com/p/network-ef...

Network effects in online dating

The more the merrier?

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · May 14

We often talk about needing to regulate powerful platforms, but such interventions can have unintended second-order effects. Read the latest #PlatformPapers blog where Allen Li and Gang Wang discuss regulatory interventions on US food-delivery platforms. platformpapers.substack.com/p/regulating...

Regulating Powerful Platforms

Unintended effects of imposing fee caps on US food-delivery platforms

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Mar 28

Smaller slices of a growing pie. How do seller entry and market expansion balance each other out in the context of food delivery platforms? Oren Reshef reports on his excellent research in the latest #platformpapers blog! platformpapers.substack.com/p/smaller-sl...

Joost Rietveld @gjrietveld.bsky.social · Mar 5

Tomorrow is D(MA)-Day! The Digital Markets Act, Europe's framework targeted at gatekeeper companies went into effect last year. March 6, is the deadline for gatekeepers to submit their compliance plans. Read about it in the latest PlatformPapers blog. platformpapers.substack.com/p/6-march-is...

Joost Rietveld @gjrietveld.bsky.social · Feb 14

How does the entry of blockbusters on a platform affect the other offerings on the platform? In the latest #PlatformPapers blog, Zhiyi Wang and Lusi Yang explore this question in the context of #Kicstarter's #crowdfunding platform. platformpapers.substack.com/p/winner-tak...

Winner takes all? Blockbusters’ effect on competition in platforms

Evidence from crowdfunding

platformpapers.substack.com

Joost Rietveld @gjrietveld.bsky.social · Jan 30

Once a month, I invite scholars to contribute a blogpost based on research included in the #platformpapers references database. You can subscribe to the blog on S*bsta*ck or read it at platformpapers.com. Please share to spread the word about platform competition research!

Home - Platform Papers

This website presents findings from a systematic and interdisciplinary review of the literature on platform competition by Joost Rietveld and Melissa Schilling. Interest in platform competition has gr...

platformpapers.com

Joost Rietveld @gjrietveld.bsky.social · Jan 30

The blog is based on Carmelo and Juan's excellent paper: Generativity Tension and Value Creation in Platform Ecosystems published in Organization Science.

pubsonline.informs.org