Joan-Ramon Borrell

Tenured Associate Professor, University of Barcelona. Research Fellow GiM-IREA-UB, OPP-UB, PPS-IESE and CRES-UPF Research Centers

[email protected]

[Tommaso Valletti @TomValletti]

Do you like books? Then read our new paper on price and non-price effects of regulation in the market for books! With @CGenakos Mario Pagliero & Lorien Sabatino.

What’s the paper about? 🧵

[Joan-Ramon Borrell @jrborrell]

🔗 Access the paper here👉 https://t.co/mgmjq1PiTs
This award encourages us to continue doing quantitative assessments in competition policy and in public policy in general @oap_ub https://t.co/WEcTMmfWGm

[Joan-Ramon Borrell @jrborrell]

🏆Very grateful and happy to have received the Award #AntitrustWritingAwards of the reader’s choice organized by @CompetitionLaws for the joint work @cgarciagalindo @JuanLuis_JG @JMOrdonezdHaro @jrborrell #AWA2025

[Joan-Ramon Borrell @jrborrell]

🎖️ The award is the one of the Academic Section in the General Economics category for writing a paper that shows the effectiveness of the leniency policy in the challenge of discovering long-lasting cartels first and then for dissuading new cartels formation

[Justin Wolfers @JustinWolfers]

Some quick tariff math. 🧵

The S&P 500 has fallen -4.5% on news of the tariffs.

Of course, markets had already priced in tariffs -- this is the response to how much worse they were than expected.

[Juan Luis Jiménez @JuanLuis_JG]

Aquí tienen sendos resúmenes en @nadaesgratis de los trabajos de @cgarciagalindo, @jrborrell, @JMOrdonezdHaro y un servidor.

Cuotas y género:
https://t.co/sE4zoTa1Zn

Leniency:

https://t.co/Ra16p6x0W0

[Juan Luis Jiménez @JuanLuis_JG]

Dos artículos nuestros nominados a Concurrences Antitrust Writing Awards. El premio lo concede el Jurado, pero hay mención para más votados por lectores.

Si cree lo merecen, gracias por votar:

https://t.co/DfRkS1rQxR

https://t.co/M7FZ30YLst

#AntitrustWritingAwards #AWA2025

[Juan Luis Jiménez @JuanLuis_JG]

Aquí el artículo de @cgarciagalindo, @jrborrell, @JMOrdonezdHaro y un servidor, publicado en abierto:

https://t.co/rbbypePW3y

Y aquí el post en @nadaesgratis que lo resume:

https://t.co/sE4zoTa1Zn

[Juan Luis Jiménez @JuanLuis_JG]

El porcentaje de mujeres en los consejos de administración de las empresas aumenta cuando...

1⃣ ...la empresa rompe un cartel en el que participaba.
2⃣ ...en el país se aplican cuotas de género vinculantes.

(sigue hilo)

[Joan-Ramon Borrell @jrborrell]

We are honored to have two papers nominated for Concurrences #AntitrustWritingAwards #AWA2025. We sincerely thank the jury for these nominations. You can vote for our papers here:

https://t.co/mgmjq1PQJ0

https://t.co/JVO689eO88

[Juan Luis Jiménez @JuanLuis_JG]

Análisis de 80 países entre 1990-2019 señala que el aumento del poder de mercado de las empresas conduce a una concentración del poder político, lo que empeora los indicadores institucionales de la democracia: aumenta corrupción y empeoran transparencia y rendición de cuentas.

[UB School of Economics @ubeconomics]

🗣️We held the 2nd edition of the UB School of #Economics Young Researchers Meeting to showcase to the @UBFacEcoiEmpres #research community the work done by our young researchers.

👥An opportunity for intergenerational discussion & networking! https://t.co/CHY17q0kQ9 #EconTwitter

[UB School of Economics @ubeconomics]

���Congratulations to our researchers @danielalbalate, @gebelque, @xfageda and @anamoraguesf, for appearing on the list of the World’s Top 2% most influential scientists in their respective disciplines by @Stanford's ranking!

 👉🏽 https://t.co/SyDPKefBHf

[Jason Kotter @JasonKotter]

Scott Baker, @PhdDfs, @m36johnson, @KPisciotta11, and I have a new paper that examines the consequences of gambling. We find that online sports betting leads households to reduce investment and increase debt, particularly for financially constrained households.

[NBER @nberpubs]

Markups of consumer products increased over 2006–19, primarily due to reductions in marginal cost. Consumers have become less price sensitive, from @HendrikDoepper, @_amackay, @NateHMiller, and @JoelStiebale https://t.co/Lb99axITPk

[Máster Econ SP-UB @MEconSPUB]

Workshop Clausura 2024
Dominancia upstream, competencia mixta público privada downstream: el canon ferroviario

🗓️10 Julio - 12:15
📍@ubeconomics
Patricia Cordovilla #ferroviario @CNMC_ES
Daniel Albalate #aeroportscat @territoricat @danielalbalate

https://t.co/GWbYOT61u2

[Juan Luis Jiménez @JuanLuis_JG]

🔔 ¿Qué harías si descubren que tu empresa ha estafado a millones de consumidores?

Volkswagen lo tuvo claro: se escondió, reduciendo un 35% su publicidad el primer año tras el Dieselgate.

En cambio, sus competidores aprovecharon la debilidad de VW para publicitarse más.

Hilo⬇️

[Yiqing Xu @xuyiqing]

(1/3) We updated our meta-analysis article on 37 political science studies using TWFE. [https://t.co/POiNHc792Y]

First, as shown previously, although no systematic biases are found, about 1/3 of the studies lose statistical significance when using an imputation estimator.

[Carmen García Galindo @cgarciagalindo]

You can find the full paper at the Journal of Competition Law & Economics @OxUniPress.
Also, you can find a summary in Spanish here 👇:
https://t.co/5qVKk796XX

[Carmen García Galindo @cgarciagalindo]

The introduction of leniency programs (LP) in two different jurisdictions (EU and Spain) at different times and the exogeneity of the introduction date enable us to identify their impact using difference-in-differences estimations.