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ORCIDGuido Schäfer
Person information
- affiliation: Centrum Wiskunde & Informatica, Amsterdam, The Netherlands
- affiliation (former): Technical University of Berlin, Department of Mathematics, Germany
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2020 – today
- 2024
[c53]Adrian Haret
, Sophie Klumper, Jan Maly, Guido Schäfer:
Committees and Equilibria: Multiwinner Approval Voting Through the Lens of Budgeting Games. EC 2024: 51-70- [c52]Riccardo Colini-Baldeschi, Sophie Klumper, Guido Schäfer, Artem Tsikiridis:
To Trust or Not to Trust: Assignment Mechanisms with Predictions in the Private Graph Model. EC 2024: 1134-1154 - [e2]Guido Schäfer, Carmine Ventre:
Algorithmic Game Theory - 17th International Symposium, SAGT 2024, Amsterdam, The Netherlands, September 3-6, 2024, Proceedings. Lecture Notes in Computer Science 15156, Springer 2024, ISBN 978-3-031-71032-2 [contents] - [i23]Riccardo Colini-Baldeschi, Sophie Klumper, Guido Schäfer, Artem Tsikiridis:
To Trust or Not to Trust: Assignment Mechanisms with Predictions in the Private Graph Model. CoRR abs/2403.03725 (2024) - [i22]Willem Feijen, Guido Schäfer, Koen Dekker, Seppo Pieterse:
Learning-Enhanced Neighborhood Selection for the Vehicle Routing Problem with Time Windows. CoRR abs/2403.08839 (2024) - 2023
- [c51]Danish Kashaev, Guido Schäfer:
Round and Bipartize for Vertex Cover Approximation. APPROX/RANDOM 2023: 20:1-20:20 - [c50]Georgios Amanatidis, Sophie Klumper, Evangelos Markakis, Guido Schäfer, Artem Tsikiridis:
Partial Allocations in Budget-Feasible Mechanism Design: Bridging Multiple Levels of Service and Divisible Agents. WINE 2023: 41-58 - [i21]Georgios Amanatidis, Sophie Klumper, Evangelos Markakis, Guido Schäfer, Artem Tsikiridis:
Partial Allocations in Budget-Feasible Mechanism Design: Bridging Multiple Levels of Service and Divisible Agents. CoRR abs/2307.07385 (2023) - 2022
- [j26]Dylan Huizing, Rob van der Mei, Guido Schäfer, Sandjai Bhulai:
The enriched median routing problem and its usefulness in practice. Comput. Ind. Eng. 168: 108063 (2022) - [j25]Georgios Amanatidis, Pieter Kleer, Guido Schäfer:
Budget-Feasible Mechanism Design for Non-monotone Submodular Objectives: Offline and Online. Math. Oper. Res. 47(3): 2286-2309 (2022) - [j24]Georgios Birmpas, Evangelos Markakis, Guido Schäfer:
Cost Sharing over Combinatorial Domains. ACM Trans. Economics and Comput. 10(1): 4:1-4:26 (2022) - [c49]Andries van Beek, Ruben Brokkelkamp, Guido Schäfer:
Corruption in Auctions: Social Welfare Loss in Hybrid Multi-Unit Auctions. AAMAS 2022: 1283-1291 - [c48]Ruben Brokkelkamp, Sjir Hoeijmakers, Guido Schäfer:
Greater Flexibility in Mechanism Design Through Altruism. SAGT 2022: 41-59 - [c47]Sophie Klumper, Guido Schäfer:
Budget Feasible Mechanisms for Procurement Auctions with Divisible Agents. SAGT 2022: 78-93 - [i20]Sophie Klumper, Guido Schäfer:
Budget Feasible Mechanisms for Procurement Auctions with Divisible Agents. CoRR abs/2206.13124 (2022) - [i19]Danish Kashaev, Guido Schäfer:
A Round and Bipartize Approximation Algorithm for Vertex Cover. CoRR abs/2211.01699 (2022) - 2021
- [j23]Pieter Kleer, Guido Schäfer:
Computation and efficiency of potential function minimizers of combinatorial congestion games. Math. Program. 190(1): 523-560 (2021) - [c46]Dylan Huizing, Guido Schäfer:
The Traveling k-Median Problem: Approximating Optimal Network Coverage. WAOA 2021: 80-98 - [i18]Andries van Beek, Ruben Brokkelkamp, Guido Schäfer:
Capturing Corruption with Hybrid Auctions: Social Welfare Loss in Multi-Unit Auctions. CoRR abs/2106.01822 (2021) - [i17]Willem Feijen, Guido Schäfer:
Using Machine Learning Predictions to Speed-up Dijkstra's Shortest Path Algorithm. CoRR abs/2112.11927 (2021) - 2020
- [j22]Dylan Huizing, Guido Schäfer, Rob D. van der Mei, Sandjai Bhulai:
The median routing problem for simultaneous planning of emergency response and non-emergency jobs. Eur. J. Oper. Res. 285(2): 712-727 (2020) - [c45]Guido Schäfer, Bernard G. Zweers:
Maximum Coverage with Cluster Constraints: An LP-Based Approximation Technique. WAOA 2020: 63-80 - [i16]Pieter Kleer, Guido Schäfer:
Topological Price of Anarchy Bounds for Clustering Games on Networks. CoRR abs/2011.09717 (2020) - [i15]Guido Schäfer, Bernard G. Zweers:
Maximum Coverage with Cluster Constraints: An LP-Based Approximation Technique. CoRR abs/2012.04420 (2020)
2010 – 2019
- 2019
- [j21]Pieter Kleer, Guido Schäfer:
The Impact of Worst-Case Deviations in Non-Atomic Network Routing Games. Theory Comput. Syst. 63(1): 54-89 (2019) - [j20]Pieter Kleer, Guido Schäfer:
Tight inefficiency bounds for perception-parameterized affine congestion games. Theor. Comput. Sci. 754: 65-87 (2019) - [c44]Georgios Amanatidis, Pieter Kleer, Guido Schäfer:
Budget-Feasible Mechanism Design for Non-Monotone Submodular Objectives: Offline and Online. EC 2019: 901-919 - [c43]Georgios Birmpas, Evangelos Markakis, Guido Schäfer:
Cost Sharing over Combinatorial Domains: Complement-Free Cost Functions and Beyond. ESA 2019: 20:1-20:17 - [c42]Ruben Brokkelkamp, Sven C. Polak, Guido Schäfer, Yllka Velaj:
Approximate Pricing in Networks: How to Boost the Betweenness and Revenue of a Node. ISAAC 2019: 13:1-13:15 - [c41]Pieter Kleer, Guido Schäfer:
Topological Price of Anarchy Bounds for Clustering Games on Networks. WINE 2019: 241-255 - [i14]Georgios Amanatidis, Pieter Kleer, Guido Schäfer:
Budget-Feasible Mechanism Design for Non-Monotone Submodular Objectives: Offline and Online. CoRR abs/1905.00848 (2019) - [i13]Georgios Birmpas, Evangelos Markakis, Guido Schäfer:
Cost Sharing over Combinatorial Domains: Complement-Free Cost Functions and Beyond. CoRR abs/1910.06384 (2019) - 2018
- [c40]Carla Groenland, Guido Schäfer:
The Curse of Ties in Congestion Games with Limited Lookahead. AAMAS 2018: 1941-1943 - [c39]Félix Carvalho Rodrigues, Guido Schäfer, Eduardo C. Xavier:
On the Effectiveness of Connection Tolls in Fair Cost Facility Location Games. ICTCS 2018: 36-47 - [c38]Félix Carvalho Rodrigues, Eduardo C. Xavier, Guido Schäfer:
On Fair Cost Facility Location Games with Non-singleton Players. CLEI Selected Papers 2018: 21-38 - [i12]Carla Groenland, Guido Schäfer:
The Curse of Ties in Congestion Games with Limited Lookahead. CoRR abs/1804.07107 (2018) - 2017
- [j19]Krzysztof R. Apt, Bart de Keijzer, Mona Rahn, Guido Schäfer, Sunil Simon:
Coordination games on graphs. Int. J. Game Theory 46(3): 851-877 (2017) - [c37]Pieter Kleer, Guido Schäfer:
Tight Inefficiency Bounds for Perception-Parameterized Affine Congestion Games. CIAC 2017: 381-392 - [c36]Pieter Kleer, Guido Schäfer:
Path Deviations Outperform Approximate Stability in Heterogeneous Congestion Games. SAGT 2017: 212-224 - [c35]Pieter Kleer, Guido Schäfer:
Potential Function Minimizers of Combinatorial Congestion Games: Efficiency and Computation. EC 2017: 223-240 - [i11]Pieter Kleer, Guido Schäfer:
Tight Inefficiency Bounds for Perception-Parameterized Affine Congestion Games. CoRR abs/1701.07614 (2017) - [i10]Pieter Kleer, Guido Schäfer:
Path deviations outperform approximate stability in heterogeneous congestion games. CoRR abs/1707.01278 (2017) - 2016
- [c34]Irving van Heuven van Staereling, Bart de Keijzer, Guido Schäfer:
The Ground-Set-Cost Budgeted Maximum Coverage Problem. MFCS 2016: 50:1-50:13 - [c33]Pieter Kleer, Guido Schäfer:
The Impact of Worst-Case Deviations in Non-Atomic Network Routing Games. SAGT 2016: 129-140 - [r2]Guido Schäfer:
Steiner Forest. Encyclopedia of Algorithms 2016: 2099-2102 - [i9]Pieter Kleer, Guido Schäfer:
The Impact of Worst-Case Deviations in Non-Atomic Network Routing Games. CoRR abs/1605.01510 (2016) - 2015
- [j18]Anupam Gupta, Jochen Könemann, Stefano Leonardi, R. Ravi, Guido Schäfer:
Efficient cost-sharing mechanisms for prize-collecting problems. Math. Program. 152(1-2): 147-188 (2015) - [j17]Bart de Keijzer, Guido Schäfer, Orestis Telelis:
The Strong Price of Anarchy of Linear Bottleneck Congestion Games. Theory Comput. Syst. 57(2): 377-396 (2015) - [j16]Aris Anagnostopoulos, Luca Becchetti, Bart de Keijzer, Guido Schäfer:
Inefficiency of Games with Social Context. Theory Comput. Syst. 57(3): 782-804 (2015) - [c32]Mona Rahn, Guido Schäfer:
Efficient Equilibria in Polymatrix Coordination Games. MFCS (2) 2015: 529-541 - [p1]Guido Schäfer:
Budgeted Matching via the Gasoline Puzzle. Gems of Combinatorial Optimization and Graph Algorithms 2015: 49-57 - [e1]Evangelos Markakis, Guido Schäfer:
Web and Internet Economics - 11th International Conference, WINE 2015, Amsterdam, The Netherlands, December 9-12, 2015, Proceedings. Lecture Notes in Computer Science 9470, Springer 2015, ISBN 978-3-662-48994-9 [contents] - [i8]Krzysztof R. Apt, Mona Rahn, Guido Schäfer, Sunil Simon:
Coordination Games on Graphs. CoRR abs/1501.07388 (2015) - [i7]Mona Rahn, Guido Schäfer:
Efficient Equilibria in Polymatrix Coordination Games. CoRR abs/1504.07518 (2015) - 2014
- [j15]Krzysztof R. Apt, Guido Schäfer:
Selfishness Level of Strategic Games. J. Artif. Intell. Res. 49: 207-240 (2014) - [j14]Po-An Chen, Bart de Keijzer, David Kempe, Guido Schäfer:
Altruism and Its Impact on the Price of Anarchy. ACM Trans. Economics and Comput. 2(4): 17:1-17:45 (2014) - [c31]Emmanouil Pountourakis, Guido Schäfer:
Mechanisms for Hiring a Matroid Base without Money. SAGT 2014: 255-266 - [c30]Tomas Jelinek, Marcus Klaas, Guido Schäfer:
Computing Optimal Tolls with Arc Restrictions and Heterogeneous Players. STACS 2014: 433-444 - [c29]Krzysztof R. Apt, Mona Rahn, Guido Schäfer, Sunil Simon:
Coordination Games on Graphs (Extended Abstract). WINE 2014: 441-446 - 2013
- [c28]Bart de Keijzer, Evangelos Markakis, Guido Schäfer, Orestis Telelis:
Inefficiency of Standard Multi-unit Auctions. ESA 2013: 385-396 - [c27]Aris Anagnostopoulos, Luca Becchetti, Bart de Keijzer, Guido Schäfer:
Inefficiency of Games with Social Context. SAGT 2013: 219-230 - [c26]Mona Rahn, Guido Schäfer:
Bounding the Inefficiency of Altruism through Social Contribution Games. WINE 2013: 391-404 - [i6]Bart de Keijzer, Evangelos Markakis, Guido Schäfer, Orestis Telelis:
On the Inefficiency of Standard Multi-Unit Auctions. CoRR abs/1303.1646 (2013) - [i5]Mona Rahn, Guido Schäfer:
Bounding the Inefficiency of Altruism Through Social Contribution Games. CoRR abs/1308.2497 (2013) - 2012
- [c25]Bart de Keijzer, Guido Schäfer:
Finding Social Optima in Congestion Games with Positive Externalities. ESA 2012: 395-406 - [c24]Krzysztof R. Apt, Guido Schäfer:
Selfishness Level of Strategic Games. SAGT 2012: 13-24 - 2011
- [j13]André Berger, Vincenzo Bonifaci, Fabrizio Grandoni, Guido Schäfer:
Budgeted matching and budgeted matroid intersection via the gasoline puzzle. Math. Program. 128(1-2): 355-372 (2011) - [c23]Luciana S. Buriol, Marcus Ritt, Félix Carvalho Rodrigues, Guido Schäfer:
On the Smoothed Price of Anarchy of the Traffic Assignment Problem. ATMOS 2011: 122-133 - [c22]Vincenzo Bonifaci, Mahyar Salek, Guido Schäfer:
Efficiency of Restricted Tolls in Non-atomic Network Routing Games. SAGT 2011: 302-313 - [c21]Po-An Chen, Bart de Keijzer, David Kempe, Guido Schäfer:
The Robust Price of Anarchy of Altruistic Games. WINE 2011: 383-390 - [i4]Krzysztof R. Apt, Guido Schäfer:
Selfishness Level of Strategic Games. CoRR abs/1105.2432 (2011) - [i3]Po-An Chen, Bart de Keijzer, David Kempe, Guido Schäfer:
The Robust Price of Anarchy of Altruistic Games. CoRR abs/1112.3680 (2011) - 2010
- [j12]Friedrich Eisenbrand, Fabrizio Grandoni, Thomas Rothvoß, Guido Schäfer:
Connected facility location via random facility sampling and core detouring. J. Comput. Syst. Sci. 76(8): 709-726 (2010) - [j11]Vincenzo Bonifaci, Tobias Harks, Guido Schäfer:
Stackelberg Routing in Arbitrary Networks. Math. Oper. Res. 35(2): 330-346 (2010) - [j10]Lisa Fleischer, Jochen Könemann, Stefano Leonardi, Guido Schäfer:
Strict Cost Sharing Schemes for Steiner Forest. SIAM J. Comput. 39(8): 3616-3632 (2010) - [c20]Janina A. Brenner, Guido Schäfer:
Online Cooperative Cost Sharing. CIAC 2010: 252-263 - [c19]Bart de Keijzer, Guido Schäfer, Orestis Telelis:
On the Inefficiency of Equilibria in Linear Bottleneck Congestion Games. SAGT 2010: 335-346
2000 – 2009
- 2008
- [j9]Jochen Könemann, Stefano Leonardi, Guido Schäfer, Stefan H. M. van Zwam:
A Group-Strategyproof Cost Sharing Mechanism for the Steiner Forest Game. SIAM J. Comput. 37(5): 1319-1341 (2008) - [j8]Janina A. Brenner, Guido Schäfer:
Group-strategyproof cost sharing mechanisms for makespan and other scheduling problems. Theor. Comput. Sci. 401(1-3): 96-106 (2008) - [c18]André Berger, Vincenzo Bonifaci, Fabrizio Grandoni, Guido Schäfer:
Budgeted Matching and Budgeted Matroid Intersection Via the Gasoline Puzzle. IPCO 2008: 273-287 - [c17]Janina A. Brenner, Guido Schäfer:
Singleton Acyclic Mechanisms and Their Applications to Scheduling Problems. SAGT 2008: 315-326 - [c16]Friedrich Eisenbrand, Fabrizio Grandoni, Thomas Rothvoß, Guido Schäfer:
Approximating connected facility location problems via random facility sampling and core detouring. SODA 2008: 1174-1183 - [c15]Vincenzo Bonifaci, Tobias Harks, Guido Schäfer:
Stackelberg Routing in Arbitrary Networks. WINE 2008: 239-250 - [r1]Guido Schäfer:
Steiner Forest. Encyclopedia of Algorithms 2008 - 2007
- [c14]Felix G. König, Marco E. Lübbecke, Rolf H. Möhring, Guido Schäfer, Ines Spenke:
Solutions to Real-World Instances of PSPACE-Complete Stacking. ESA 2007: 729-740 - [c13]Anupam Gupta, Jochen Könemann, Stefano Leonardi, R. Ravi, Guido Schäfer:
An efficient cost-sharing mechanism for the prize-collecting Steiner forest problem. SODA 2007: 1153-1162 - [c12]Janina A. Brenner, Guido Schäfer:
Cost Sharing Methods for Makespan and Completion Time Scheduling. STACS 2007: 670-681 - 2006
- [j7]Luca Becchetti, Stefano Leonardi, Alberto Marchetti-Spaccamela, Guido Schäfer, Tjark Vredeveld:
Average-Case and Smoothed Competitive Analysis of the Multilevel Feedback Algorithm. Math. Oper. Res. 31(1): 85-108 (2006) - [j6]Hannah Bast, Kurt Mehlhorn, Guido Schäfer, Hisao Tamaki:
Matching Algorithms Are Fast in Sparse Random Graphs. Theory Comput. Syst. 39(1): 3-14 (2006) - [c11]Lisa Fleischer, Jochen Könemann, Stefano Leonardi, Guido Schäfer:
Simple cost sharing schemes for multicommodity rent-or-buy and stochastic Steiner tree. STOC 2006: 663-670 - 2005
- [j5]Guido Schäfer, Naveen Sivadasan:
Topology matters: Smoothed competitiveness of metrical task systems. Theor. Comput. Sci. 341(1-3): 216-246 (2005) - [c10]Jochen Könemann, Stefano Leonardi, Guido Schäfer, Stefan H. M. van Zwam:
From Primal-Dual to Cost Shares and Back: A Stronger LP Relaxation for the Steiner Forest Problem. ICALP 2005: 930-942 - [c9]Jochen Könemann, Stefano Leonardi, Guido Schäfer:
A group-strategyproof mechanism for Steiner forests. SODA 2005: 612-619 - [i2]Luca Becchetti, Stefano Leonardi, Alberto Marchetti-Spaccamela, Guido Schäfer, Tjark Vredeveld:
Average Case and Smoothed Competitive Analysis of the Multi-Level Feedback Algorithm. Algorithms for Optimization with Incomplete Information 2005 - [i1]Guido Schäfer, Naveen Sivadasan:
Topology Matters: Smoothed Competitiveness of Metrical Task Systems. Algorithms for Optimization with Incomplete Information 2005 - 2004
- [b1]Guido Schäfer:
Worst case instances are fragile: average case and smoothed competitive analysis of algorithms. Saarland University, Saarbrücken, Germany, 2004, pp. 1-115 - [j4]Stefano Leonardi, Guido Schäfer:
Cross-monotonic cost sharing methods for connected facility location games. Theor. Comput. Sci. 326(1-3): 431-442 (2004) - [c8]Stefano Leonardi, Guido Schäfer:
Cross-monotonic cost-sharing methods for connected facility location games. EC 2004: 242-243 - [c7]Hannah Bast, Kurt Mehlhorn, Guido Schäfer, Hisao Tamaki:
Matching Algorithms Are Fast in Sparse Random Graphs. STACS 2004: 81-92 - [c6]Guido Schäfer, Naveen Sivadasan:
Topology Matters: Smoothed Competitiveness of Metrical Task Systems. STACS 2004: 489-500 - 2003
- [j3]Hannah Bast, Kurt Mehlhorn, Guido Schäfer:
A Heuristic for Dijkstra's Algorithm with Many Targets and Its Use in Weighted Matching Algorithms. Algorithmica 36(1): 75-88 (2003) - [c5]Luca Becchetti, Stefano Leonardi, Alberto Marchetti-Spaccamela, Guido Schäfer, Tjark Vredeveld:
Average Case and Smoothed Competitive Analysis of the Multi-Level Feedback Algorithm. FOCS 2003: 462-471 - [c4]Luca Becchetti, Stefano Leonardi, Alberto Marchetti-Spaccamela, Guido Schäfer:
Scheduling to Minimize Flow Time Metrics. IPDPS 2003: 223 - 2002
- [j2]Kurt Mehlhorn, Volker Priebe, Guido Schäfer, Naveen Sivadasan:
All-pairs shortest-paths computation in the presence of negative cycles. Inf. Process. Lett. 81(6): 341-343 (2002) - [j1]Kurt Mehlhorn, Guido Schäfer:
Implementation of O(n m log n) Weighted Matchings in General Graphs: The Power of Data Structures. ACM J. Exp. Algorithmics 7: 4 (2002) - 2001
- [c3]Kurt Mehlhorn, Guido Schäfer:
A Heuristic for Dijkstra's Algorithm with Many Targets and Its Use in Weighted Matching Algorithms. ESA 2001: 242-253 - 2000
- [c2]Kurt Mehlhorn, Guido Schäfer:
Implementation of O (nm log n) Weighted Matchings in General Graphs. The Power of Data Structures. WAE 2000: 23-38
1990 – 1999
- 1998
- [c1]Daniele Frigioni, Tobias Miller, Umberto Nanni, Giulio Pasqualone, Guido Schäfer, Christos D. Zaroliagis:
An Experimental Study of Dynamic Algorithms for Directed Graphs. ESA 1998: 368-380
Coauthor Index
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