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Ioannis Evangelidis @ievangelidis.bsky.social · 22/07/2026

Your favorite chocolate bar costs the same and looks the same but now contains less cocoa. That is skimpflation: reducing quality while keeping price and size unchanged. My new JCR paper finds that consumers punish it more than shrinkflation or a price increase. doi.org/10.1093/jcr/...

doi.org

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Ioannis Evangelidis @ievangelidis.bsky.social · 28/04/2026

New paper alert! (doi.org/10.1093/jcr/...) How much does a no-choice option really change what people choose in surveys and experiments?

doi.org

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Ioannis Evangelidis @ievangelidis.bsky.social · 02/02/2026

New paper (forthcoming in Cognition): Context-dependent effects of branches in decisions under risk authors.elsevier.com/a/1mXL%7E2Hx... Key finding: when people choose between risky options, they’re more likely to pick the one with more distinct probabilistic outcomes (“more pathways to winning”).

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Ioannis Evangelidis @ievangelidis.bsky.social · 05/11/2025

***TPM2026 in Barcelona, June 6–8 – Call for Papers*** The conference webpage & call for papers for the Theory + Practice in Marketing (TPM) Conference, which will be hosted by ESADE Business School in Barcelona (June 6–8), are now available at: tpmesade.com. Submission Deadline: January 15, 2026

tpmesade.com

TPM Conference 2026 – @Esade Barcelona, June 6-8

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Data Colada @datacolada.bsky.social · 23/06/2025

Colada[128] The Best Audit Study and its interesting shortcoming datacolada.org/128

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Data Colada @datacolada.bsky.social · 02/06/2025

Don't assume, plot datacolada.org/126

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Ioannis Evangelidis @ievangelidis.bsky.social · 02/04/2025

Join us on May 27, 2025, for the third annual SJDM Doctoral Symposium! Link to register: stonybrookuniversity.co1.qualtrics.com/jfe/form/SV_... Looking forward to “seeing” you there! 2025 Doctoral Symposium Committee Margaret Echelbarger Ioannis Evangelidis Ellen Evers

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George Wu @geowu.bsky.social · 07/02/2025

A new working paper with Daniel Banki, @urisohn.bsky.social and Robert Walatka, just submitted to SSRN. The paper is comment on Ryan Oprea's recent AER paper. The paper is processing, but you, my friends, get early entry. papers.ssrn.com/sol3/papers....

Title Authors Abstract (Decision under Risk are Decisions Under Complexity: Comment)

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Ioannis Evangelidis @ievangelidis.bsky.social · 03/02/2025

You're probably misunderstanding people's preferences derived from polling results (e.g., 70% of people prefer A over B). In a new paper led by Graham Overton, we discuss this issue and how you can better calibrate your understanding. Short summary: spsp.org/news/charact...

spsp.org

You’re Probably Misunderstanding Polling Results | SPSP

When polls reveal a preference between options, people can misinterpret what that preference means.

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Ioannis Evangelidis @ievangelidis.bsky.social · 24/11/2024

We (i.e., the marketing department at ESADE) are looking for PhD students. Please spread the word:

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Ioannis Evangelidis @ievangelidis.bsky.social · 20/11/2024

Another reminder that in a regression with 2 dummy-coded independent variables (X1,X2) and their interaction [Y=b1*X1+b2*X2+b3*X1*X2, where X1(0=group 1,1=group 2), X2(0=group 1, 1=group 2)], b1 and b2 are NOT main effects. They are conditional effects of each variable when the other=0.

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Ioannis Evangelidis @ievangelidis.bsky.social · 15/02/2024

Went through JMR's and JCR's latest issues. Not counting qualitative studies and analyses of secondary data, 5 out of 37 (13.5%) studies at JMR were preregistered, while 5 out of 26 (19.2%) studies at JCR were preregistered. Also, no paper wherein all studies were preregistered.

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Ioannis Evangelidis @ievangelidis.bsky.social · 05/12/2023

Chocolates are becoming smaller, potato chip bags have more air, and toilet paper rolls are slimming down. We’ve all seen it and we all hate it. Happy to share my new Marketing Science paper on "shrinkflation aversion" with the world. Preprint here: tinyurl.com/shrinkflatio...

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Ioannis Evangelidis @ievangelidis.bsky.social · 22/11/2023

Spotted in the wild (JEPG): "Analysis scripts are publicly accessible at (osf link). Data is accessible upon reasonable request. The materials used in this study are widely available." 🤔

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Ioannis Evangelidis @ievangelidis.bsky.social · 09/11/2023

Reading the soup bowl study replication. I'm wondering whether the smaller effect size in the replication could partly be attributed to the soup in the replication having more calories per ounce (22 vs 18 in original). If food is heavier, people have lower potential to eat 1/3

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Ioannis Evangelidis @ievangelidis.bsky.social · 31/10/2023

JCR retraction: academic.oup.com/jcr/advance-... "The authors state that the hypothesized link between power and consumption deserves future empirical consideration before the field draws any firm conclusions about this relationship." Nope. No future empirical consideration is deserved.

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Niels van de Ven @nielsvandeven.bsky.social · 24/10/2023

New paper in PNAS (with Anna Paley)! 2 contributions: 1) People have many more subscriptions than they think they have, and if they know this they intend to cancel some 2) We use crowdsourcing to generate and evaluate nudges, and find that they performed better than those made by experts

pnas.org

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

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Ioannis Evangelidis @ievangelidis.bsky.social · 17/10/2023

I reviewed a paper with 3 experiments, small samples & not preregistered. I asked for 1 preregistered replication in my review. Authors responded that they didn't run more studies because the paper would become too long. I recommended rejection. Paper is conditionally accepted. Lol

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Ioannis Evangelidis @ievangelidis.bsky.social · 06/10/2023

If you were choosing between hotels A (price per night: 79, 3 stars) and B (price per night: 109, 4 stars), would your choice be influenced by adding C (price per night: 109, 3 stars)? Our new paper that answers this question is now free for a limited time at: academic.oup.com/jcr/article/...

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