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P David Boll

@pdavidboll.bsky.social
1.4K followers 3.5K following 69 posts

Economics PhD student @warwickecon.bsky.social . Interested in labour markets (micro and macro), and spatial econometrics. Confusingly goes by middle name. www.pauldavidboll.com

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P David Boll @pdavidboll.bsky.social · 14/01/2026
🚨Deadline approaching🚨 Submit your extended abstracts to the Warwick Economics PhD Conference 2026 by 31st January! Great research + great people + free accommodation + travel funding! For further info follow link below. Please share widely!
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Sascha O. Becker @essobecker.bsky.social · 08/01/2026
We presented results on spatial unit roots etc at ASSA 2026 in Philadelphia. Joint work with @pdavidboll.bsky.social and @jvoth.bsky.social Short 🧵 (1/N) cc @andreamatranga.bsky.social @paulgp.com
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Sascha O. Becker @essobecker.bsky.social · 02/01/2026
Three SIOE @sioecon.bsky.social sessions on Sat 3rd Jan 2026 at @assameeting.bsky.social Philadelphia 0800-1000: Education, Immigration, and Knowledge Diffusion 1015-1215: Econometric Issues in Comparative Economics 1430-1630: Models of Autocracy See you there!
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P David Boll @pdavidboll.bsky.social · 06/12/2025
Even ignoring any fairness concerns, allowing scams like this to soak up productive capacity is bad economic policy. It's hard to think of a more obvious example of pure rent-seeking.
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CAGE Research Centre @cagewarwick.bsky.social · 05/12/2025
Another great opportunity for PhD students to gather feedback on their work, learn from national and international colleagues, and build up networks. Submissions by 31st January 2026. Find out more: sites.google.com/view/warwick...
14th Economics PhD Conference 25-27 May 2026
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P David Boll @pdavidboll.bsky.social · 03/12/2025
PhD Students in Econ (and related fields): Join us at Warwick for a 3 day conference in May 2026! There will be sessions covering all major fields, along with two great keynotes and plenty of time to socialise with peers. We look forward to your submission (deadline: 31/01/2026), more info below.
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P David Boll @pdavidboll.bsky.social · 05/11/2025
Link to new version: pauldavidboll.com/SPUR_Stata_J... Stata package: github.com/pdavidboll/S... The new title reflects that we have significantly extended the practical application section to make this paper more useful to applied researchers generally, regardless of software persuasion.
pauldavidboll.com
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P David Boll @pdavidboll.bsky.social · 05/11/2025
🚨 New Version 🚨 The new and extended version of our paper on dealing with spatial unit roots in regressions, now *forthcoming at the Stata Journal* under a new title! w/ @essobecker.bsky.social @jvoth.bsky.social Relevant to anyone who uses spatial data ! Link and more information in🧵(1/n)
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P David Boll @pdavidboll.bsky.social · 30/10/2025
For sure, but I still think they're both important. E.g., much lower AfD vote share in Niedersachsen and Schleswig-Holstein compared to former DDR, despite being similarly protestant.
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P David Boll @pdavidboll.bsky.social · 30/10/2025
Speaking very much as a non-expert, I'd say the first two are the main ones, but all of them to some extent. The main difference to Britain, it seems to me, is that class gradients exist mostly _within_ regions rather than across.
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P David Boll @pdavidboll.bsky.social · 30/10/2025
(Class and location/region that is.)
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P David Boll @pdavidboll.bsky.social · 30/10/2025
It's very hard for Brits to wrap their heads around those two things not being the same thing.
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P David Boll @pdavidboll.bsky.social · 24/04/2025
Related to 3.: Further improvements in e-learning technology, increasing scalability for the "best" educators and displacing the others?
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P David Boll @pdavidboll.bsky.social · 09/04/2025
It says "one of the closest", to be precise.
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P David Boll @pdavidboll.bsky.social · 18/03/2025
I don't claim that GDP is a perfect measure of human welfare, but this is incorrect. Curing diabetes would free up resources, both of diabetes patients and the health care system, which would be put to other uses (see broken window fallacy). Otherwise we could increase GDP by giving people diabetes?
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P David Boll @pdavidboll.bsky.social · 08/03/2025
Would be interesting to know how much of this was the initial "shock" of the spread of protestantism vs the feedback generated from educated mothers educating their daughters and so on.
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Sascha O. Becker @essobecker.bsky.social · 01/03/2025
It was time to donate again to the 🇺🇦 Kyiv School of Economics led by the amazing @tymofiibrik.bsky.social and @mylovanov.bsky.social 🇺🇦 If you want to support KSE in these tough times 👇 foundation.kse.ua/en
foundation.kse.ua
Home - KSE Charitable Foundation
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P David Boll @pdavidboll.bsky.social · 24/02/2025
I don't think "professionals" is the correct translation of "Beamte" in this case. "Beamte" means civil servants, which in Germany comprises many employees of public institutions (teachers, professors, police officers, administrative officials, ...).
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Joachim Voth @jvoth.bsky.social · 22/01/2025
so much fun working @essobecker.bsky.social and David Boll
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Sascha O. Becker @essobecker.bsky.social · 22/01/2025
🚨 New Working Paper 🚨 w/ @pdavidboll.bsky.social and @jvoth.bsky.social Do you run regressions on spatial data? Then keep reading! We present a guide and Stata package for methods by Müller and Watson (2024 ECTA) to deal with Spatial Unit Roots in Regressions. Link in 🧵 (1/n)
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P David Boll @pdavidboll.bsky.social · 22/01/2025
#EconSky
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P David Boll @pdavidboll.bsky.social · 22/01/2025
Questions and comments welcome ! (n/n)
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P David Boll @pdavidboll.bsky.social · 22/01/2025
We present a practical guide to these methods for empirical researchers, along with an easy-to-use Stata package that implements them: github.com/pdavidboll/S... (4/n)
github.com
GitHub - pdavidboll/SPUR: Stata package around Spatial Unit Roots. Please cite Becker, Boll and Voth (2025) when using it.
Stata package around Spatial Unit Roots. Please cite Becker, Boll and Voth (2025) when using it. - pdavidboll/SPUR
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P David Boll @pdavidboll.bsky.social · 22/01/2025
Müller and Watson (2024) show that strong spatial dependence ("spatial unit roots") can lead to spurious regression results even with HAC corrections, in a parallel to well-known results from time series. They develop diagnostic tests and a method to remove unit roots. (3/n)
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P David Boll @pdavidboll.bsky.social · 22/01/2025
Link to Working Paper: warwick.ac.uk/fac/soc/econ... It is well-known that spatial dependence is a problem for inference in regressions that use spatial data. However, standard HAC correction methods are only enough when dependence is not too strong. (2/n)
warwick.ac.uk
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P David Boll @pdavidboll.bsky.social · 22/01/2025
🚨 New Working Paper 🚨 w/ @essobecker.bsky.social @jvoth.bsky.social Do you run regressions on spatial data? Then keep reading! We present a guide and Stata package for methods by Müller and Watson (2024) to deal with Spatial Unit Roots in Regressions. Link in🧵(1/n)
Abstract for Paper "Spatial Unit Roots in Regressions: A Practitioner’s Guide and a Stata Package"
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P David Boll @pdavidboll.bsky.social · 14/01/2025
🚨 Deadline approaching 🚨 PhD students in Econ and related fields, please submit your extended abstracts for our PhD conference *by 31st Jan*! We pay for your travel, accommodation and food, and we always have great speakers and lots of fun! More info and submission form below. #EconSky #EconPhD
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Warwick Economics @warwickecon.bsky.social · 14/01/2025
🚨 Deadline approaching! 🚨 Apply for the 13th Warwick Economics PhD conference, taking place from 3-5 June 2025. Applications are welcome from every field in economics. Accommodation and travel costs will be covered. Keynotes by Prof Stefano Caria and Dr Amrita Kulka 👉 deadline: 31st January!
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P David Boll @pdavidboll.bsky.social · 18/12/2024
The hope is for future high speed rail projects to continue in a clockwise fashion back to Old Oak Common, at which point the lines will form a ring, referred to informally in policy circles as the HS25.
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P David Boll @pdavidboll.bsky.social · 18/12/2024
The year is 2047, plans for the new HS6 line from Old Oak Common to Walthamstow have been approved. In Walthamstow, passengers will be able to change to the recently opened HS5 line, which will take them speedily on to Woolwich and Bromley.
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CAGE Research Centre @cagewarwick.bsky.social · 03/12/2024
A great opportunity for PhD students to gather feedback on their work, learn from national and international colleagues, and build up networks. Submissions by 31st January 2025. Find out more: 👉 sites.google.com/view/warwick...
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P David Boll @pdavidboll.bsky.social · 11/12/2024
Oh for sure, but does that explain the discontinuities at the borders? (Which aren't all that apparent for Bonn)
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P David Boll @pdavidboll.bsky.social · 11/12/2024
Yes that kind of thing is what I had in mind. Hadn't appreciated the full scale of the horror of those ads though 😂
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P David Boll @pdavidboll.bsky.social · 11/12/2024
Free research idea: The borders of the Holy Roman Empire around 1200 and university choice in the 21st century.
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P David Boll @pdavidboll.bsky.social · 11/12/2024
(Insert hand-waving about network effects.)
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P David Boll @pdavidboll.bsky.social · 11/12/2024
Good point. Last attempt: maybe because the education system is so heavily federalised, universities advertise more intensely to secondary schools in the same state? Or the respective state ministry for education predominantly advertises degrees at unis in their state?
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P David Boll @pdavidboll.bsky.social · 11/12/2024
Oh okay, I didn't know that. So BW and BV unis didn't/don't give students any kind of transport discounts, or only within-city?
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P David Boll @pdavidboll.bsky.social · 11/12/2024
Second reason I could think of is that some fields (definitely teaching, maybe law) are still state-specific. E.g., with a teaching degree from Niedersachsen it is harder to become a teacher in Sachsen, etc. If people want to move back closer to home, this may lead to home-state bias.
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P David Boll @pdavidboll.bsky.social · 11/12/2024
Could it be partly that students often get heavily subsidised regional travel tickets from their universities, which only work within the respective state, and that students use these to visit home on weekends etc? May not be so relevant anymore with the 49-Euro ticket, but maybe in the past...
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P David Boll @pdavidboll.bsky.social · 04/12/2024
Elgar & Walton?
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P David Boll @pdavidboll.bsky.social · 03/12/2024
#EconSky #EconPhD
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P David Boll @pdavidboll.bsky.social · 03/12/2024
🚨 Call for Papers 🚨 If you're a PhD student in Economics, please submit your extended abstracts! We always have great programmes, and are very generous with funding. If you have any questions, write to us using the email on the website, or comment below for short questions.
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Warwick Economics @warwickecon.bsky.social · 03/12/2024
🚨 Call for Papers 🚨 The 13th Warwick Economics PhD conference will take place 3-5 June 2025. Applications are welcome from every field in economics. Accommodation and travel costs will be covered. Keynotes by Prof Stefano Caria and Dr Amrita Kulka The deadline is 31st January! Link in🧵
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Warwick Economics @warwickecon.bsky.social · 27/11/2024
Carmen Villa @carmenvillaecon.bsky.social specialises in Public Economics and Law and Economics. Her JMP shows that the closure of youth clubs, due to austerity cuts, led to decreases in educational performance and rises in youth offending. buff.ly/3OriDeT #EconJobMarket
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Warwick Economics @warwickecon.bsky.social · 27/11/2024
Sarthak Joshi's job market paper shows how the changing spatial distribution of work can exacerbate gender employment gaps when women face higher barriers to commuting than men. Visit: buff.ly/49bSoCW #EconJobMarket
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Warwick Economics @warwickecon.bsky.social · 27/11/2024
Angelica's job market paper explores how preferences for shorter working hours drive women into informal employment due to the limited availability of part-time jobs in the formal sector. buff.ly/3ZgJEIi #EconJobMarket
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Warwick Economics @warwickecon.bsky.social · 27/11/2024
Xueying Zhao's JMP shows that a monopolist data seller can design and price information via a mechanism, which fully extracts the first-best surplus by strategically leveraging data correlations. Visit: buff.ly/3YZ65QY #EconJobMarket
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Warwick Economics @warwickecon.bsky.social · 27/11/2024
Edoardo Tolva's job market paper uses the Russian airspace closure as a quasi-experiment to estimate the elasticity between transport modes and develops a model to measure its impact on welfare. Find out more: buff.ly/4hTFEEZ #EconJobMarket
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P David Boll @pdavidboll.bsky.social · 01/12/2024
One of my favourite examples was when he bundled together the German Greens and the AfD as "those types of parties", in the context of support for Ukraine.
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