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Lars Ehlers

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Professeur titulaire

Faculté des arts et des sciences - Département de sciences économiques

Pavillon Lionel-Groulx office C6026

lars.ehlers@umontreal.ca

514 343-7532

Affiliations

Education Programs

  • Economics and Politics
  • Economics and Politics

Courses

  • ECN4040 Microéconomie honor
  • ECN7040 Microéconomie A
  • ECN70952 Séminaire de doctorat 2

Areas of Expertise

Lars Ehlers joined the Université de Montréal in 2001. He earned his PhD in Economics at the University of Maastricht in 2001, after graduating in Mathematics from the University of Aachen, in 1997.

He is an elected member of the Council of the Society for Social Choice and Welfare and a member of the Board of the Society for Economic Design.

In the 2003 SSHRC Standard Research Grants competition, his research proposal was ranked first in Canada. In 2012, the Society for Social Choice and Welfare awarded him the 6th Social Choice and Welfare Prize. He is the organizer of the Microeconomic Theory Group at CIREQ.

At present, his research deals with the manipulation of matching mechanisms on labour markets, the assignment of indivisible objects and externalities in cooperative environments.

Student supervision Expand all Collapse all

Three essays in microeconomic theory Thèses et mémoires dirigés / 2020 - 2020
Graduate : Sidibé, Abdoul Karim
Cycle : Doctoral
Grade : Ph. D.
Essays on matching and preference aggregation Thèses et mémoires dirigés / 2018 - 2018
Graduate : Bonkoungou, Somouaoga
Cycle : Doctoral
Grade : Ph. D.
Agreements with overlapping coalitions Thèses et mémoires dirigés / 2013 - 2013
Graduate : Agbaglah, Messan H.
Cycle : Doctoral
Grade : Ph. D.
Nouvelle approche en théorie des jeux comportementale Thèses et mémoires dirigés / 2012 - 2012
Graduate : Desbiens, Eric
Cycle : Master's
Grade : M. Sc.
Fusion et groupage en différenciation verticale. Thèses et mémoires dirigés / 2006 - 2006
Graduate : DIALLO, Thierno
Cycle : Doctoral
Grade : Ph. D.
Fusion et groupage en différentiation verticale Thèses et mémoires dirigés / 2006 - 2006
Graduate : Diallo, Thierno
Cycle : Doctoral
Grade : Ph. D.

Research projects Expand all Collapse all

Subvention de déphasage_Centre interuniversitaire de recherche en économie quantitative (CIREQ) Projet de recherche au Canada / 2020 - 2023

Lead researcher : Emanuela Cardia , Benoit Perron
Co-researchers : Laurent J. Lewis , Walter Bossert , Lars Ehlers , Michael Huberman , William J. McCausland , Marine Carrasco , Bariş Kaymak , Massimiliano Amarante , Andriana Bellou , Immo Schott , Sean Horan , Deniz Dizdar , Yves Sprumont , Nicolas Klein , Raphaël Godefroy , Julien Bengui , René Garcia , Vasia Panousi , Guillaume Sublet , Dovonon Prosper , Arijit Kumar Nandi , Erin Strumpf , Sophie Bernard , Robert D Cairns , Victoria Zinde-Walsh , John W Galbraith , Ngo Van Long , Russell Davidson , Francisco Alvarez-Cuadrado , Markus Poschke , Daniel Barczyk , Simon Van Norden , Hassan Benchekroun , Jorgen Hansen , Eferosyni Diamantoudi , Ming Li , Paul Gomme , Tatyana Koreshkova , Damba Lkhagvasuren , Xie Huan , Matthieu Chemin , Rohan Dutta , Fabian Lange , Jean-Marie Dufour , Samuel Harper , Adrian Vetta , Guy Lacroix , Silvia Goncalves , Patrick Richard , Taoufik Bouezmani , Martino Pelli , Markus Herrmann , Hafedh Bouakez , Wen Fang Xie , Pierre-Carl Michaud , Francesco Amodio , Leonardo Baccini , Rui Castro , Saraswata Chaudhuri , Laura Lasio , Francisco Ruge , Nathan Yang , Hiroki Watanabe
Funding sources: FRQSC/Fonds de recherche du Québec - Société et culture (FQRSC)
Grant programs: PV129894-(RG) Programme Regroupements stratégiques - Subvention de déphasage

Maximizing the Number of Matches in Market Design: Public Housing, Refugees and School Choice Projet de recherche au Canada / 2017 - 2023

Lead researcher : Lars Ehlers
Funding sources: CRSH/Conseil de recherches en sciences humaines du Canada
Grant programs: PVXXXXXX-Subvention Savoir

Recherches sur les fondations des mécanismes d'allocation des ressources Projet de recherche au Canada / 2016 - 2021

Lead researcher : Lars Ehlers
Co-researchers : Walter Bossert , Sean Horan , Yves Sprumont
Funding sources: FRQSC/Fonds de recherche du Québec - Société et culture (FQRSC)
Grant programs: PVXXXXXX-(SE) Programme Soutien aux équipes de recherche - Stade de développement : Renouvellement

CENTRE INTERUNIVERSITAIRE DE RECHERCHE EN ECONOMIE QUANTITATIVE (CIREQ) Projet de recherche au Canada / 2014 - 2021

Lead researcher : Emanuela Cardia , Benoit Perron
Co-researchers : Gérard Gaudet , Walter Bossert , Rui Castro , Lars Ehlers , Sílvia Gonçalves , Michael Huberman , William J. McCausland , Michel Poitevin , Francisco Ruge-Murcia , Marine Carrasco , Marc Henry , Bariş Kaymak , Massimiliano Amarante , Andriana Bellou , Ilze Kalnina , Joshua Lewis , Immo Schott , Sean Horan , Deniz Dizdar , Yves Sprumont , Vikram Manjunath , Nicolas Klein , Raphaël Godefroy , Julien Bengui , Sebastian Stumpner , Vasia Panousi , Mathieu Marcoux , Christopher Raphael Rauh , Dovonon Prosper , Erin Strumpf , Robert D Cairns , Victoria Zinde-Walsh , John W Galbraith , Ngo Van Long , Russell Davidson , Licun Xue , Francisco Alvarez-Cuadrado , Markus Poschke , Daniel Barczyk , Simon Van Norden , Hassan Benchekroun , Nikolay Gospodinov , Jorgen Hansen , Eferosyni Diamantoudi , Ming Li , Dipjyoti Majumdar , Szilvia Papai , Paul Gomme , Tatyana Koreshkova , Damba Lkhagvasuren , Artem Chneerov , Xie Huan , David Fuller , Matthieu Chemin , Rohan Dutta , Fabian Lange , Jian Li , Jean-Marie Dufour , Pierre Lasserre , Charles Séguin , Theodore Papageorgiou , Patrick Richard , Taoufik Bouezmani , Martino Pelli
Funding sources: FRQSC/Fonds de recherche du Québec - Société et culture (FQRSC)
Grant programs: PV129894-(RG) Programme Regroupements stratégiques

FLEXIBLE SCHOOL CHOICE Projet de recherche au Canada / 2012 - 2018

Lead researcher : Lars Ehlers
Funding sources: CRSH/Conseil de recherches en sciences humaines du Canada
Grant programs: PVXXXXXX-Subvention Savoir

RECHERCHE SUR LES FONDATIONS DES MÉCANISMES SOUS INCERTITUDE NON PROBABILISÉE ET EFFECTIVITÉ DES COALITIONS DANS LES SOCIÉTÉS DIVERSES Projet de recherche au Canada / 2012 - 2017

Lead researcher : Lars Ehlers
Funding sources: FRQSC/Fonds de recherche du Québec - Société et culture (FQRSC)
Grant programs: PVXXXXXX-(SE) Programme Soutien aux équipes de recherche - Stade de développement : Renouvellement

CENTRE INTERUNIVERSITAIRE DE RECHERCHE EN ECONOMIE QUANTITATIVE (CIREQ) Projet de recherche au Canada / 2008 - 2015

Lead researcher : Emanuela Cardia
Co-researchers : Marcel Boyer , Gérard Gaudet , Jean Marie Dufour , Walter Bossert , Rui Castro , Lars Ehlers , Sílvia Gonçalves , Michael Huberman , William J. McCausland , Benoit Perron , Michel Poitevin , Francisco Ruge-Murcia , Marine Carrasco , Marc Henry , Bariş Kaymak , Alessandro Riboni , Massimiliano Amarante , Andriana Bellou , Ilze Kalnina , Onur Ozgur , Sidartha Gordon , Yves Sprumont , Vikram Manjunath , Nicolas Klein , Raphaël Godefroy , Julien Bengui , René Garcia , Lyndon Moore , Dovonon Prosper , Erin Strumpf , James Engel-Warnick , Robert D Cairns , Victoria Zinde-Walsh , John W Galbraith , Ngo Van Long , Russell Davidson , Licun Xue , Francisco Alvarez-Cuadrado , Markus Poschke , Daniel Barczyk , Simon Van Norden , Éric Jacquier , Hassan Benchekroun , Nikolay Gospodinov , Jorgen Hansen , Eferosyni Diamantoudi , Ming Li , Dipjyoti Majumdar , Szilvia Papai , Paul Gomme , Tatyana Koreshkova , Artem Prokhorov , Damba Lkhagvasuren , Artem Chneerov , Xie Huan , David Fuller , Matthieu Chemin , Maxim Sinitsyn , Dhanoos Sutthiphisal , Takashi Kunimoto , Jennifer Hunt , Rohan Dutta , Fabian Lange , Jian Li , Pierre Lasserre
Funding sources: FRQSC/Fonds de recherche du Québec - Société et culture (FQRSC)
Grant programs: PV129894-(RG) Programme Regroupements stratégiques

BREAKING TIES IN SCHOOL CHOICE : WALK ZONES VERSUS SPECIALIZED SCHOOLS Projet de recherche au Canada / 2009 - 2011

Lead researcher : Lars Ehlers

Publications Expand all Collapse all

  • " Top Trading with Fixed Tie-Breaking in Markets with Indivisible Goods ", Journal of Economic Theory 151, 2014, 64-87.
  • " Budget-Balance, Fairness and Minimal Manipulability ", Theoretical Economics 9, 2014, 64-87 (avec T. Andersson and L.-G. Svensson).
  • " Strategy-Proofness makes the Difference: Deferred-Acceptance with Responsive Priorities ", Mathematics of Operations Research 39, 2014, 949-966 (avec B. Klaus).
  • " School Choice with Controlled Choice Constraints: Hard Bounds versus Soft Bounds ", Journal of Economic Theory 154, 2014, 648-683 (avec I.E. Hafalir, M.B. Yenmez and M.A. Yilidrim).
  • " Matching Markets under (In)complete Information ", Journal of Economic Theory 157, 2015, 295-317 (avec J. Massó).
  • " Object Allocation via Deferred-Acceptance: Strategy-Proofness and Comparative Statics ", Games and Economic Behavior 97, 2016, 128-146 (avec B. Klaus).
  • " Regulation via the Polluter-Pays Principle ", Economic Journal 126, 2016, 884-906 (avec S. Ambec).
  • " Transferring Ownership of Public Housing to Existing Tenants: A Market Design Approach ", Journal of Economic Theory 165, 2016, 643-671 (avec T. Andersson and L.-G. Svensson).
  •  “Strategy-Proofness and Essentially Single-Valued Cores Revisited,”
  • Journal of Economic Theory 176 (2018): 393—407.
  • “Strategy-Proof Tie-Breaking in Matching with Priorities,” with A. Westkamp,  
  • Theoretical Economics 13 (2018): 1009—1042.
  • “Continuity and Incentive Compatibility in Cardinal Mechanisms,” with D. Majumdar, D. Mishra and A. Sen, Journal of Mathematical Economics 88 (2020): 31—41.
  • “Assigning Refugees to Landlords in Sweden: Efficient Stable Maximum Matchings,” with T. Andersson, Scandinavian Journal of Economics 122 (2020): 937—965.
  • “(Il)legal Assignments in School Choice,” with T. Morrill,
  • Review of Economic Studies 87 (2020): 1837—1875.
  • “Organizing Time Exchanges: Lessons from Matching Markets,” with T. Andersson, Á. Cseh and A. Erlanson, American Economic Journal: Microeconomics 13 (2021): 338—373.
  • “Minimally Unstable Pareto Improvement over the Deferred Acceptance Mechanism,” with B. Doğan, Theoretical Economics 16 (2021): 1249—1279.
  • “An Algorithm for Identifying Agent-k-linked Allocations in Economies with Indivisibilities,” with T. Andersson, International Journal of Economic Theory 18 (2022): 50—60 (Special Issue in honor of W. Thomson).
  • “Robust Minimal Instability of the Top-Trading Cycles Mechanism,” with B. Doğan,
  • American Economic Journal: Microeconomics 14 (2022): 556—582.
  • “Gale’s Fixed Tax for Exchanging Houses,” with T. Andersson, L.-G. Svensson, and R. Tierney, Mathematics of Operations Research 47 (2022): 3110—3128.
  • “Normative Properties for Object Allocation Problems: Characterizations and Trade-offs,” with B. Klaus, Chapter 10 in “Online and Matching-Based Market Design” (eds. F. Echenique, N. Immorlica and V.V. Vazirani), Cambridge University Press, forthcoming.
  • “Three Public Goods and Lexicographic Preferences:  Preferences: Replacement Principle,” 
  • Review of Economic Design 26 (2022): 367—384 (Special Issue in honor of S. Koray).

  • School Choice with Control ", 2010.
  • Strategy-Proofness and Essentially Single-Valued Cores Revisited ", 2014.
  • Assigning Refugees to Landlords in Sweden: Efficient Stable Maximum Matchings ", 2017 (avec T. Andersson).
  • Strategy-Proof Tie-Breaking in Matching with Priorities ", 2017 (avec A. Westkamp).
  • (Il)legal Assignments in School Choice ", 2017 (avec T. Morrill).
  • Externalities and the Nucleolus ", 2017 (avec M. Álvarez-Munos).
  • School Choice with Control ", 2010.
  • Strategy-Proofness and Essentially Single-Valued Cores Revisited ", 2014.
  • Assigning Refugees to Landlords in Sweden: Efficient Stable Maximum Matchings ", 2017 (avec T. Andersson).
  • Strategy-Proof Tie-Breaking in Matching with Priorities ", 2017 (avec A. Westkamp).
  • (Il)legal Assignments in School Choice ", 2017 (avec T. Morrill).
  • Externalities and the Nucleolus ", 2017 (avec M. Álvarez-Munos).
  • “Robust Design in Monotonic Matching Markets: A Case for Firm-Proposing Deferred-Acceptance,” with J. Massó, May 2018. Lien: https://cireqmontreal.com/wp-content/uploads/cahiers/04-2018-cah.pdf
  • “Dynamic Refugee Matching,” with T. Andersson and A. Martinello, October 2018. Lien: https://cireqmontreal.com/wp-content/uploads/cahiers/22-2018-cah.pdf
  • “Non-Manipulable House Exchange under (Minimum) Equilibrium Prices,” with T. Andersson and L.-G. Svensson, December 2020.Lien: https://cireqmontreal.com/wp-content/uploads/cahiers/01-2021-cah.pdf
  • “Strategy-Proof and Envyfree Random Assignment,” with C. Basteck, December 2020. Lien: https://cireqmontreal.com/wp-content/uploads/cahiers/02-2021-cah.pdf
  • “Student-Optimal Interdistrict School Choice: District-Based versus School-Based Admissions,” November 2022). (CI-JOINT)

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