So Trump is making a 'deal' with Putin to reduce the impact of his own disastrous mistakes with Iran and the Strait of Hormuz, and thus further prolongs Russia's ability to wake war on Ukraine. Dumb, shortsighted, irresponsible. www.nytimes.com/2026/10/09/u...

Trump Says He Will Import Russian Diesel Fuel Amid High Prices

President Trump said Russia had agreed to ship potentially millions of tons of diesel fuel in the coming months. But the amounts would be small relative to global demand.

nytimes.com

So Trump is making a 'deal' with Putin to reduce the impact of his own disastrous mistakes with Iran and the Strait of Hormuz, and thus further prolongs Russia's ability to wake war on Ukraine. Dumb, shortsighted, irresponsible. www.nytimes.com/2026/10/09/u...

Trump Says He Will Import Russian Diesel Fuel Amid High Prices

President Trump said Russia had agreed to ship potentially millions of tons of diesel fuel in the coming months. But the amounts would be small relative to global demand.

nytimes.com

🚨 The R Manual for QCA has been updated to version 4.2. It's a step-by-step guide to running #QCA in R, with a narrative PDF, an R script you can adapt for your own project, and sample data for the analysis and plots. patrickmello.com/qca/r-manual/ #QCA #rstats

R Manual for QCA • Patrick A. Mello

Assistant Professor in International Security at Vrije Universiteit Amsterdam. Research on international security, foreign policy, and Qualitative Comparative Analysis (QCA).

patrickmello.com

🚨 The R Manual for QCA has been updated to version 4.2. It's a step-by-step guide to running #QCA in R, with a narrative PDF, an R script you can adapt for your own project, and sample data for the analysis and plots. patrickmello.com/qca/r-manual/ #QCA #rstats

R Manual for QCA • Patrick A. Mello

Assistant Professor in International Security at Vrije Universiteit Amsterdam. Research on international security, foreign policy, and Qualitative Comparative Analysis (QCA).

patrickmello.com

It’s been 10 years since I started teaching #QCA at the Social Sciences Summer School at @usi.ch in Lugano. So rewarding to see how PhD students and researchers apply the method in creative ways to topics from across the social sciences. Many thanks to this year’s group!

And like everything else Trump touches, if he had just left it alone, it would be fine.

Hoodlum 🇺🇸@nothoodlum.bsky.social · last mo.

$16 million later, the Lincoln Memorial Reflecting Pool was supposed to be open by July 4. Instead, it looks like this.

🚨 Last chance for QCA in Lugano (registration closes next Monday)!

Patrick A. Mello@patrickmello.bsky.social · 6mo ago

🚨 Registration's open for the #QCA course at the 30th Summer School in Social Sciences Methods at @usi.ch in Lugano! 🇨🇭🏝️ Details here: www.usi.ch/en/education...

@ejeancarroll.bsky.social: "I don't understand how people can be afraid of a fat elderly man who wears apricot makeup, his hair done up like Tippi Hedren in The Birds and sits in a court room and moans and groans and complains”

Last chance to register for the remaining spots of the Lugano #QCA summer school course. (If you have questions about the course, feel free to reach out via email)👇

Patrick A. Mello@patrickmello.bsky.social · 6mo ago

🚨 Registration's open for the #QCA course at the 30th Summer School in Social Sciences Methods at @usi.ch in Lugano! 🇨🇭🏝️ Details here: www.usi.ch/en/education...

Last chance to register for the remaining spots of the Lugano #QCA summer school course. (If you have questions about the course, feel free to reach out via email)👇

Patrick A. Mello@patrickmello.bsky.social · 6mo ago

🚨 Registration's open for the #QCA course at the 30th Summer School in Social Sciences Methods at @usi.ch in Lugano! 🇨🇭🏝️ Details here: www.usi.ch/en/education...

🚨 We are hiring an Assistant Professor in Political Science, with a focus on International Peace and Security @vuamsterdam.bsky.social (deadline May 22). 👉 workingat.vu.nl/vacancies/as...

The President of the United States is threatening to commit war crimes and wipe out a "whole civilization" — all because he started a disastrous war of his own making and had no plan and no strategy for how to end it. This is abhorrent, and the American people do not support this.

🚨 Registration's open for the #QCA course at the 30th Summer School in Social Sciences Methods at @usi.ch in Lugano! 🇨🇭🏝️ Details here: www.usi.ch/en/education...

🚨 Registration's open for the #QCA course at the 30th Summer School in Social Sciences Methods at @usi.ch in Lugano! 🇨🇭🏝️ Details here: www.usi.ch/en/education...

Registration is still open for the #QCA course at the 30th USI Summer School, please spread the word! 👇

Patrick A. Mello@patrickmello.bsky.social · 9mo ago

🎇 Register now for the Qualitative Comparative Analysis (#QCA) workshop at the 30th Summer School in Social Sciences Methods in Lugano (August 17-21)!

Goodbye, Cincinnati! #QCA

For impressions from previous years, see patrickmello.com/qualitative-...

🎇 Register now for the Qualitative Comparative Analysis (#QCA) workshop at the 30th Summer School in Social Sciences Methods in Lugano (August 17-21)!

Exploring Causal Complexity with Qualitative Comparative Analysis (QCA)

Instructor: Patrick A. Mello Modality: In presence Week 2: 17-21 August 2026   Workshop Contents and Objectives Causal complexity is everywhere in the social sciences—yet most researchers lack the sys...

usi.ch

🎇 Register now for the Qualitative Comparative Analysis (#QCA) workshop at the 30th Summer School in Social Sciences Methods in Lugano (August 17-21)!

Exploring Causal Complexity with Qualitative Comparative Analysis (QCA)

Instructor: Patrick A. Mello Modality: In presence Week 2: 17-21 August 2026   Workshop Contents and Objectives Causal complexity is everywhere in the social sciences—yet most researchers lack the sys...

usi.ch

So, if you conduct research like this yourself, or if you know a colleague to whom this applies, please get in touch using DM (or send either of us an email)! 5/5

The work can by either inductive or deductive, start from PT or start from the cross-case; we want to get to know it all. 4/

More specifically, we are looking to show-case work that combines comparative case studies (CCS) or Qualitative Comparative Analysis (QCA) on the one hand, with Process Tracing (PT) on the other. 3/

For a book manuscript, Uncovering Causal Symptoms. Case Study Research, Process Tracing, and Qualitative Comparative Analysis, @patrickmello.bsky.social and I are looking for good (preferably published) work that combines cross-case with within-case analysis. 2/

We're hiring a Lecturer in Political Science @vuamsterdam.bsky.social (deadline Nov 24): 👉 werkenbij.vu.nl/vacatures/le...

Exploring Causal Complexity with Qualitative Comparative Analysis #QCA is now on #YouTube. 📺 Thanks to everyone at #ISA @isanet.bsky.social for making this possible! 🙏

Exploring Causal Complexity with Qualitative Comparative Analysis (QCA)

YouTube video by International Studies Association (ISA)

youtube.com

Exploring Causal Complexity with Qualitative Comparative Analysis #QCA is now on #YouTube. 📺 Thanks to everyone at #ISA @isanet.bsky.social for making this possible! 🙏

Exploring Causal Complexity with Qualitative Comparative Analysis (QCA)

YouTube video by International Studies Association (ISA)

youtube.com

Today's violation of Estonia's airspace by Russian military aircraft is an extremely dangerous provocation. This marks the third such violation of EU airspace in days and further escalates tensions in the region. The EU stands in full solidarity with Estonia (1/2)

Thanks for the wonderful turnout for this event: 86 people from 27 countries! 🌐🎉 The #QCA recording will be made available by @isanet.bsky.social via their channels.

Patrick A. Mello@patrickmello.bsky.social · last yr.

Social and political phenomena rarely have single-cause explanations. Qualitative Comparative Analysis #QCA offers a structured approach to causal complexity. On Sep 17, @isanet.bsky.social hosts a free virtual introduction to the method of #QCA - sign up here: buff.ly/fMK5s2L

Social and political phenomena rarely have single-cause explanations. Qualitative Comparative Analysis #QCA offers a structured approach to causal complexity. On Sep 17, @isanet.bsky.social hosts a free virtual introduction to the method of #QCA - sign up here: buff.ly/fMK5s2L

Social and political phenomena rarely have single-cause explanations. Qualitative Comparative Analysis #QCA offers a structured approach to causal complexity. On Sep 17, @isanet.bsky.social hosts a free virtual introduction to the method of #QCA - sign up here: buff.ly/fMK5s2L