Jens Rommel

@jensrommel.bsky.social

1.5K followers 3.2K following 90 posts

Agricultural Economist at the Swedish University of Agricultural Sciences | Behavioral and Experimental Economics of Agriculture and the Environment | Posting mostly in English and German

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Economics 26%

Business 18%

Posts Replies Media Videos

Reposted by Richard S.J. Tol, Jens Rommel

Yann de Mey @yanndemey.bsky.social · 11d

2025 Gorilla update 👋🦍: One student found the gorilla this time around (see details in thread below). BUT, I have an AI-related update that is too good not to share ... #EconSky 📉📈

Jens Rommel @jensrommel.bsky.social · 14d

Super-cool new paper, using an RCT to estimate the impact of information framing on eco scheme uptake: doi.org/10.1186/s401...

Screenshot of abstract and title, follow link for text access

Reposted by Michael A. Clemens, Ben Barr, Magnus Johansson , and 4 more Michael A. Clemens, Ben Barr, Magnus Johansson, Ingo Rohlfing, Jens Rommel, Jill A. Jacobson, Jan R. Boehnke

Dan Lewer @danlewer.bsky.social · 14d

We wrote an article explaining why you shouldn't put several variables into a regression model and report which are statistically significant - even as exploratory research. bmjmedicine.bmj.com/content/4/1/.... How did we do?

A "methods primer" article in the journal "BMJ Medicine", titled "Factors associated with: problems of using exploratory multivariable regression to identify causal risk factors"

Reposted by Richard Waite

Jens Rommel @jensrommel.bsky.social · 14d

In a new article, we study acceptance of methane-reducing feed additives among Swedish dairy farmers; acceptance is high overall (low willingness-to-accept), i.e., feed additives are a cost-effective GHG mitigation measure in Sweden doi.org/10.1093/erae...

Title and abstract screenshot from paper; follow link for text

Reposted by Bartosz Bartkowski

Jens Rommel @jensrommel.bsky.social · 16d

In a new article, we test different behavioral interventions (and combinations) in four EU countries. Null results on "light green" eco-schemes.

doi.org/10.1093/erae...

Abstract and title; follow link for text

Reposted by Jens Rommel

Moritz Peter Fritschle @moritzfritschle.bsky.social · 18d

Cool methodological, new paper in #mousetracking in #econ research. #QOpen #agecon #DCE

Mouse tracking in a DCE can be a useful and valid tool 🔧 to uncover Hidden decision-processes without interfering with respondents decisionmaking. 💡

Q Open Paper: Validating Mouse Tracking in economic research

Reposted by Stefan M. Herzog, Jens Rommel

Julia M. Rohrer @dingdingpeng.the100.ci · 25d

Gambetta & Origgi on the LL Game, in which agents prefer to deliver and receive (!) low quality.

This paper is absolutely savage but also feels uncomfortably relevant to parts of academia outside of Italy 👀

diegogambetta.org/wp-content/u...

Abstract
We investigate a phenomenon which we have experienced as common when dealing
with an assortment of Italian public and private institutions: people promise to exchange
high-quality goods and services, but then something goes wrong and the quality delivered
is lower than had been promised. While this is perceived as ‘cheating’ by outsiders,
insiders seem not only to adapt to, but to rely on this outcome. They do not resent
low-quality exchanges; in fact, they seem to resent high-quality ones, and are inclined
to put pressure on or avoid dealing with agents who deliver high quality. The equilibrium
among low-quality producers relies on an unusual preference ranking which differs from
that associated with the Prisoners’ Dilemma and similar games, whereby self-interested
rational agents prefer to dish out low quality in exchange for high quality. While equally
‘lazy’, agents in our low-quality worlds are oddly ‘pro-social’: for the advantage of
maximizing their raw self-interest, they prefer to receive low-quality goods and services,
provided that they too can in exchange deliver low quality without embarrassment. They
develop a set of oblique social norms to sustain their preferred equilibrium when threatened by the intrusion of high quality. We argue that high-quality collective outcomes are
endangered not only by self-interested individual defectors, but by ‘cartels’ of mutually
satisfied mediocrities.

Reposted by Jens Rommel, Sebastian J. Goerg

Daniel Lakens @lakens.bsky.social · 27d

Call For Papers: Journal of Business Economics – Special Issue – Behavioral Ethics Under Review: Replications and Theoretical Foundations

Call for Regular Articles & Registered Reports

sbeonline.org/2025/10/call...

Call For Papers: Journal of Business Economics - Special Issue - Behavioral Ethics Under Review: Replications and Theoretical Foundations - Society for Business Ethics

Call for Regular Articles & Registered Reports Special Issue on “Behavioral Ethics Under Review: Replications and Theoretical Foundations” The Journal of Business Economics is currently receiving…

sbeonline.org

Reposted by Richard S.J. Tol, Jens Rommel

Ed Hagen @edhagen.net · 28d

I'm starting to explore {simDAG}, a nifty #rstats package that has a nice API for specifying DAGs and then simulating data from them: robindenz1.github.io/simDAG/

Simulate Data from a DAG and Associated Node Information

Simulate complex data from a given directed acyclic graph and information about each individual node. Root nodes are simply sampled from the specified distribution. Child Nodes are simulated according...

robindenz1.github.io

Reposted by Valerie Mueller, Jens Rommel

Moritz Peter Fritschle @moritzfritschle.bsky.social · 28d

Job Alert for PhDs in #Agricultural #Economics 🚨

2 Positions open for PhD-Researchers at the Chair of Agricultural Economics at the University of Rostock with @sebastianlakner.bsky.social . Positions are for German-speaking individuals including teaching activities.

2 Wissenschaftliche/r Mitarbeiter/in (m/w/d) - Agrarökonomie

jobs.uni-rostock.de

Reposted by Jens Rommel

Alistair Munro @alistair-munro.bsky.social · Oct 12

In October's Environmental and Resource Economics we honour Daniel Kahneman's legacy: Noel Zigrand Hoven & Karine Nyborg document how being observed increases pro-social behaviour but can also create substitution away from non-observable contributions. #EconSky

The Mixed Effects of Making Contribution Behaviors Observable - Environmental and Resource Economics

Environmental and Resource Economics - Voluntary contributions to public goods have been shown to increase when contribution behaviors become observable by peers. We examine the effect of social...

buff.ly

Reposted by Jens Rommel

Giorgos Diakoulakis @gdiak.eu · Oct 12

📢 New publication 🚨🚨🚨

I am happy to share a new publication (open access) regarding farmers' intentions to adopt a DSS, combined with data from meteorological stations, for pest management: doi.org/10.1016/j.at...

Grateful to my amazing co-authors

#agriecon

Redirecting

doi.org

Reposted by Martin Paul Eve, Jens Rommel

Queen Olivia III @queenoliviaiii.com · Oct 12

In honour of spooky month, share a 4 word horror story that only someone in your profession would understand.

“The tapes wouldn’t start”

Eleanor G @zaichishka.bsky.social · Oct 12

In honour of spooky month, share a 4 word horror story that only someone in your profession would understand.

“Translate 'yoroshiku onegai shimasu'”.

NinjaKittyELF 忍者キティ🥷🐈‍⬛🎄 @ninjakitty.bsky.social · Oct 12

In honor of spooky month, share a 4 word horror story that only someone in your profession would understand.

“School WiFi is down”.

Reposted by Jens Rommel

Department of Economics, SLU @slu-econ.bsky.social · Oct 11

New article: "Swedish Consumers' Willingness-to-Pay for Plant-Based Proteins in Pasta Sauce: Preferences and Policy Scenarios"

doi.org/10.1002/agr....

Reposted by Aaron Sojourner, Jens Rommel, Marta Kołczyńska , and 1 more Aaron Sojourner, Jens Rommel, Marta Kołczyńska, Maksym Polyakov

Dariia Mykhailyshyna @dariia.bsky.social · Oct 10

❗️Our next workshop will be on Oct 16th, 6 pm CEST titled Structural Bayesian Techniques for Experimental and Behavioral Economics in R& Stan by @jamesbland.bsky.social
Register or sponsor a student by donating to support Ukraine!
Details: bit.ly/3wBeY4S
Please share!
#AcademicSky #EconSky #RStats

Reposted by Richard S.J. Tol, Andreas Ortmann, Ian Hussey , and 2 more Richard S.J. Tol, Andreas Ortmann, Ian Hussey, Jens Rommel, Johannes Breuer

Jörg Ankel-Peters @jrgptrs.bsky.social · Oct 9

New DP @i4replication.bsky.social: Meta-analysis on green nudges correcting for publication bias. "Behavioral interventions on households and individuals are unlikely to deliver material climate benefits." www.econstor.eu/bitstream/10...

Jens Rommel @jensrommel.bsky.social · Oct 8

Thanks for highlighting this! Let's see if a journal wants this.

Reposted by Jens Rommel

Moritz Peter Fritschle @moritzfritschle.bsky.social · Oct 8

Cool new research piece by Julian Sagebiel, @jensrommel.bsky.social and @qrisschulze.bsky.social about pre-registrations for #DCE.

Pre-regs are researchers' commitments to design, research question, hypothesis and data collection and can enhance research transparency.

A Pre-Registration Template for Transparent Choice Experiment Research

This paper discusses pre-registration for choice experiments, a common method for valuing non-market goods in environmental economics. In a pre-registration, au

papers.ssrn.com

Reposted by Jens Rommel

Michael Roth 🇪🇺🇺🇦🇬🇪🇮🇱 @michaelroth.bsky.social · Oct 5

Heute gibt’s was auf die Ohren: mit Wolfgang Heim spreche ich bei Apokalypse & Filterkaffee über #ZonenDerAngst. @mickybeisenherz.bsky.social

Hört doch mal rein. 👇🏽 🎧 💥

apokalypse-und-filterkaffee.podigee.io/1572-heimspi...

Heimspiel: Höhenrausch und Absturz (mit Michael Roth)

Michael Roth saß 27 Jahre für die SPD im Bundestag, war zum Schluss der Vorsitzende des Auswärtigen Ausschusses. Vor kurzem hat er die Politik verlassen und ein Buch mit dem beziehungsreichen Titel “Z...

apokalypse-und-filterkaffee.podigee.io

Reposted by Jens Rommel, Wolfgang Huber, Maksym Polyakov

Paul Hünermund @p-hunermund.com · Oct 3

Post a favorite econ paper: Lichter et al. (2021, JEEA) @sigginho.bsky.social

Regions with higher Stasi spy density in East Germany still show lower trust, lower incomes, higher unemployment, and less entrepreneurship decades after reunification.

Open-access link: doi.org/10.1093/jeea...

Reposted by Jens Rommel

Robert Finger @robertfinger.bsky.social · Oct 3

Deadline for Abstracts 15.10.2025.

54th Annual conference Swiss Society for Agricultural Economics and Agricultural Sociology (SGA) May 07-08, 2026 at BFH in Zollikofen on “Economic and social resilience in the agricultural and food sector”

Further details www.sse-sga.ch/en/sse-sga/m...

Reposted by Jens Rommel

Bartosz Bartkowski @bartoszbartk.com · Oct 2

Mein Status als „Person mit Migrationshintergrund“ ist ziemlich offensichtlich. Da man es mir (abgesehen vom Namen) aber kaum anmerkt, gehe ich oft genug als „deutsch“ durch. Und auch wenn mir persönlich das ziemlich egal ist, weil ich kein Bedürfnis habe, als „deutsch“ oder „polnisch“...

Bartosz Bartkowski @bartoszbartk.com · Oct 2

Ein sehr lesenswerter Text

sz-magazin.sueddeutsche.de/leben-und-ge...

»Einen Migrationshintergrund hat niemand, er wird einem zugeschrieben«

sz-magazin.sueddeutsche.de

Reposted by Joanna Bryson, Meredith Broussard, Ingo Rohlfing , and 9 more Joanna Bryson, Meredith Broussard, Ingo Rohlfing, Ian Hussey, Martin Kreidl, Brian Keegan, Matt N Williams, Jens Rommel, Dana R. Fisher, Johannes Breuer, Nathan P. Kalmoe, Dana Howard

Julia M. Rohrer @dingdingpeng.the100.ci · Oct 1

A lot of psych is already conducted with online convenience samples & ppl are probably excited about silicon samples bc it would allow them to crank out more studies for even less 💸

How about we reconsider the idea that sciencey science involves collecting own data.
www.science.org/content/arti...

AI-generated ‘participants’ can lead social science experiments astray, study finds

Data produced by “silicon samples” depends on researchers’ exact choice of models, prompts, and settings

www.science.org

Reposted by Richard S.J. Tol, Andreas Kotsadam, Jens Rommel , and 1 more Richard S.J. Tol, Andreas Kotsadam, Jens Rommel, Dietmar Fehr

Institute for Replication @i4replication.bsky.social · Sep 30

🚨I4R is looking to hire postdoc fellows in public health and computer science!

The postdoc will join a team of researchers and help mass reproduce studies in leading public health journals or develop AI replicator agents.

Info 👇

Reposted by Ingolf Kühn, Jens Rommel

Bartosz Bartkowski @bartoszbartk.com · Sep 30

Really, really happy to share this new publication by Malin Gütschow and myself on farmers’ identity in the context of multifunctionality 🚜🌾🪲🐦

link.springer.com/article/10.1...

A 🧵

Farmers (are expected to) fulfil diverse economic, environmental, and social roles or functions. Yet the relative importance of these functions remains contested both within farming communities and in the broader society. Understanding how farmers prioritize these different functions as a reflection of their role identity is crucial, given the increasing recognition of the importance of identity as a determinant of farmer behaviour. We frame this aspect of farmer identity in terms of multifunctionality, a common lens for analysing the performance of agriculture relative to societal demands. However, while this concept is often used with an ecological focus, our study builds on a broader interpretation that encompasses the full range of social, cultural, economic, and ecological functions. Furthermore, we focus on the roles farmers themselves would like to play when looking 10 to 20 years into the future. We apply Q methodology to see how farmers from Eastern Germany prioritize among 71 societal functions. We use the Q sorts and qualitative data to derive and characterize a typology of three narrative perspectives. The results demonstrate the breadth and heterogeneity of farmers' role identity, and therefore the need to go beyond a narrow focus on ecological roles or functions.

Reposted by Jens Rommel

Gilad Feldman @giladfeldman.bsky.social · Sep 29

Our PCIRR Stage 2 Registered Report now officially accepted by Royal Society Open Science:

"Revisiting mental accounting classic paradigms: Replication Registered Report of the problems reviewed in Thaler (1999)"

Mengfei Li's remarkable UG RRR thesis.

Details 👇🧵

Reposted by Jens Rommel

Shon Ferguson @shonferguson.bsky.social · Sep 24

Very happy to share the published version of this paper, which is open access.

"The impact of animal welfare regulations on pork trade: evidence from European countries" (with Anna Wallenbeck, Sigrid Agenäs, and Helena Hansson)
doi.org/10.1016/j.fo...

Redirecting

doi.org

Reposted by Richard S.J. Tol, Jens Rommel, Johannes Breuer

Jörg Ankel-Peters @jrgptrs.bsky.social · Sep 17

I4R Replication Games coming to Münster! @i4replication.bsky.social @aufdroeseler.bsky.social @fialalenka.bsky.social

Reposted by Jens Rommel

Department of Economics, SLU @slu-econ.bsky.social · Sep 16

New article: "Comparing a multi-item Rasch scale for purchase intentions with preference elicitation using experimental auctions for consumer acceptance of biofortified food: An in-store study in Rwanda"

doi.org/10.1016/j.fo...

Reposted by Joanna Bryson, Richard S.J. Tol, Dorothy Bishop , and 5 more Joanna Bryson, Richard S.J. Tol, Dorothy Bishop, Alistair Munro, Knut Einar Rosendahl, Dominik Wiedenhofer, Paolo Crosetto, Jens Rommel

Joel Wood 🇨🇦 @joelwwood.bsky.social · Sep 15

Whoa! Elsevier fired @richardtol.bsky.social, longstanding Editor-in-Chief of the journal Energy Economics. Richard's side of the story should be ringing alarm bells. #EconSky

Fraud and cover-up
richardtol.substack.com/p/fraud-and-...

Fraud and cover-up

richardtol.substack.com

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