Impulse balance and framing effects in threshold public good games
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DOI: 10.1111/jpet.12359
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- Goerg Sebastian J. & Sadrieh Abdolkarim & Neugebauer Tibor, 2016.
"Impulse Response Dynamics in Weakest Link Games,"
German Economic Review, De Gruyter, vol. 17(3), pages 284-297, August.
- Sebastian J. Goerg & Tibor Neugebauer & Abdolkarim Sadrieh, 2016. "Impulse Response Dynamics in Weakest Link Games," German Economic Review, Verein für Socialpolitik, vol. 17(3), pages 284-297, August.
- James Andreoni, 1995.
"Warm-Glow versus Cold-Prickle: The Effects of Positive and Negative Framing on Cooperation in Experiments,"
The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 110(1), pages 1-21.
- Andreoni, J., 1994. "Warm-Glow Versus Cold-Prickle: The Effects of Positive and Negative Farming on Cooperation in Experiments," Working papers 9406, Wisconsin Madison - Social Systems.
- James Andreoni, 1994. "Warm-Glow versus Cold-Prickle: The Effects of Positive and Negative Framing on Cooperation in Experiments," Experimental 9410002, University Library of Munich, Germany.
- James Andreoni, 1997. "Warm-glow versus cold-prickle: the effect of positive and negative framing on cooperation in experiments," Levine's Working Paper Archive 671, David K. Levine.
- Ockenfels, Axel & Selten, Reinhard, 2005.
"Impulse balance equilibrium and feedback in first price auctions,"
Games and Economic Behavior, Elsevier, vol. 51(1), pages 155-170, April.
- Axel Ockenfels & Reinhard Selten, 2002. "Impulse Balance Equilibrium and Feedback in First Price Auctions," Papers on Strategic Interaction 2002-12, Max Planck Institute of Economics, Strategic Interaction Group.
- Axel Ockenfels & Reinhard Selten, 2004. "Impulse Balance Equilibrium and Feedback in First Price Auctions," Working Paper Series in Economics 7, University of Cologne, Department of Economics.
- Palfrey, Thomas R. & Rosenthal, Howard, 1984.
"Participation and the provision of discrete public goods: a strategic analysis,"
Journal of Public Economics, Elsevier, vol. 24(2), pages 171-193, July.
- Palfrey, Thomas & Rosenthal, Howard., 1983. "Participation and the Provision of Discrete Public Goods: A Strategic Analysi," Working Papers 465, California Institute of Technology, Division of the Humanities and Social Sciences.
- Wolfgang Buchholz & Richard Cornes & Dirk Rübbelke, 2018.
"Public goods and public bads,"
Journal of Public Economic Theory, Association for Public Economic Theory, vol. 20(4), pages 525-540, August.
- Wolfgang Buchholz & Richard Cornes & Dirk Rübbelke, 2017. "Public Goods and Public Bads," CESifo Working Paper Series 6437, CESifo.
- Dufwenberg, Martin & Gächter, Simon & Hennig-Schmidt, Heike, 2011.
"The framing of games and the psychology of play,"
Games and Economic Behavior, Elsevier, vol. 73(2), pages 459-478.
- Dufwenberg, Martin & Gächter, Simon & Henning-Schmidt, Heike, 2008. "The Framing of Games and the Psychology of Play," Bonn Econ Discussion Papers 15/2008, University of Bonn, Bonn Graduate School of Economics (BGSE).
- Martin Dufwenberg & Simon Gaechter & Heike Hennig-Schmidt, 2010. "The Framing of Games and the Psychology of Play," Discussion Papers 2010-16, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Dufwenberg, Martin & Gächter, Simon & Hennig-Schmidt, Heike, 2010. "The Framing of Games and the Psychology of Play," Bonn Econ Discussion Papers 15/2010, University of Bonn, Bonn Graduate School of Economics (BGSE).
- Edward Cartwright & Anna Stepanova, 2017.
"Efficiency in a forced contribution threshold public good game,"
International Journal of Game Theory, Springer;Game Theory Society, vol. 46(4), pages 1163-1191, November.
- Edward Cartwright & Anna Stepanova, 2015. "Efficiency in a forced contribution threshold public good game," Studies in Economics 1506, School of Economics, University of Kent.
- Surajeet Chakravarty & Miguel A. Fonseca, 2017.
"Discrimination via Exclusion: An Experiment on Group Identity and Club Goods,"
Journal of Public Economic Theory, Association for Public Economic Theory, vol. 19(1), pages 244-263, February.
- Surajeet Chakravarty & Miguel A. Fonseca, 2013. "Discrimination via Exclusion: An Experiment on Group Identity and Club Goods," Discussion Papers 1302, University of Exeter, Department of Economics.
- Chmura, Thorsten & Goerg, Sebastian J. & Selten, Reinhard, 2012.
"Learning in experimental 2×2 games,"
Games and Economic Behavior, Elsevier, vol. 76(1), pages 44-73.
- Chmura, Thorsten & Goerg, Sebastian J. & Selten, Reinhard, 2008. "Learning in experimental 2×2 games," Bonn Econ Discussion Papers 18/2008, University of Bonn, Bonn Graduate School of Economics (BGSE).
- Thorsten Chmura & Sebastian Goerg & Reinhard Selten, 2011. "Learning in experimental 2 x 2 games," Discussion Paper Series of the Max Planck Institute for Research on Collective Goods 2011_26, Max Planck Institute for Research on Collective Goods.
- R. Cookson, 2000. "Framing Effects in Public Goods Experiments," Experimental Economics, Springer;Economic Science Association, vol. 3(1), pages 55-79, June.
- Fosgaard, Toke R. & Hansen, Lars Gårn & Wengström, Erik, 2014.
"Understanding the nature of cooperation variability,"
Journal of Public Economics, Elsevier, vol. 120(C), pages 134-143.
- Fosgaard, Toke & Hansen , Lars Gårn & Wengström, Erik, 2013. "Understanding the Nature of Cooperation Variability," Working Papers 2013:6, Lund University, Department of Economics.
- Toke Fosgaard & Lars Gårn Hansen & Erik Wengström, 2013. "Understanding the Nature of Cooperation Variability," IFRO Working Paper 2013/4, University of Copenhagen, Department of Food and Resource Economics.
- Rachel Croson & Melanie Marks, 2000. "Step Returns in Threshold Public Goods: A Meta- and Experimental Analysis," Experimental Economics, Springer;Economic Science Association, vol. 2(3), pages 239-259, March.
- Reinhard Selten & Klaus Abbink & Ricarda Cox, 2005.
"Learning Direction Theory and the Winner’s Curse,"
Experimental Economics, Springer;Economic Science Association, vol. 8(1), pages 5-20, April.
- Selten, Reinhard & Abbink, Klaus & Cox, Ricarda, 2001. "Learning Direction Theory and the Winner s Curse," Bonn Econ Discussion Papers 10/2001, University of Bonn, Bonn Graduate School of Economics (BGSE).
- Koji Kotani & Shunsuke Managi & Kenta Tanaka, 2008. "Further investigations of framing effects on cooperative choices in a provision point mechanism," Economics Bulletin, AccessEcon, vol. 3(51), pages 1-9.
- Sonnemans, Joep & Schram, Arthur & Offerman, Theo, 1998. "Public good provision and public bad prevention: The effect of framing," Journal of Economic Behavior & Organization, Elsevier, vol. 34(1), pages 143-161, January.
- Park, Eun-Soo, 2000. "Warm-glow versus cold-prickle: a further experimental study of framing effects on free-riding," Journal of Economic Behavior & Organization, Elsevier, vol. 43(4), pages 405-421, December.
- Reinhard Selten & Thorsten Chmura, 2008.
"Stationary Concepts for Experimental 2x2-Games,"
American Economic Review, American Economic Association, vol. 98(3), pages 938-966, June.
- Selten, Reinhard & Chmura, Thorsten, 2005. "Stationary Concepts for Experimental 2x2 Games," Bonn Econ Discussion Papers 33/2005, University of Bonn, Bonn Graduate School of Economics (BGSE).
- Toke Reinholt Fosgaard & Lars Gårn Hansen & Erik Wengström, 2017.
"Framing and Misperception in Public Good Experiments,"
Scandinavian Journal of Economics, Wiley Blackwell, vol. 119(2), pages 435-456, April.
- Toke Reinholt Fosgaard & Lars Gårn Hansen & Erik Wengström, 2011. "Framing and Misperceptions in a Public Good Experiment," IFRO Working Paper 2011/11, University of Copenhagen, Department of Food and Resource Economics, revised Oct 2012.
- Urs Fischbacher, 2007. "z-Tree: Zurich toolbox for ready-made economic experiments," Experimental Economics, Springer;Economic Science Association, vol. 10(2), pages 171-178, June.
- Bougherara, Douadia & Denant-Boemont, Laurent & Masclet, David, 2011.
"Cooperation and framing effects in provision point mechanisms: Experimental evidence,"
Ecological Economics, Elsevier, vol. 70(6), pages 1200-1210, April.
- Douadia Bougherara & Laurent Denant-Boèmont & David Masclet, 2011. "Cooperation and framing effects in provision point mechanisms: Experimental evidence," Post-Print halshs-00601682, HAL.
- Chmura, Thorsten & Goerg, Sebastian J. & Selten, Reinhard, 2014. "Generalized Impulse Balance: An Experimental Test for a Class of 3 × 3 Games," Review of Behavioral Economics, now publishers, vol. 1(1-2), pages 27-53, January.
- Menusch Khadjavi & Andreas Lange, 2015. "Doing good or doing harm: experimental evidence on giving and taking in public good games," Experimental Economics, Springer;Economic Science Association, vol. 18(3), pages 432-441, September.
- Reinhard Selten & Klaus Abbink & Ricarda Cox, 2005.
"Learning Direction Theory and the Winner’s Curse,"
Experimental Economics,
Springer;Economic Science Association, vol. 8(1), pages 5-20, April.
- Reinhard Selten & Klaus Abbink & Ricarda Cox, 2001. "Learning Direction Theory and the Winner’s Curse," Bonn Econ Discussion Papers bgse10_2001, University of Bonn, Germany.
- Iturbe-Ormaetxe, Iñigo & Ponti, Giovanni & Tomás, Josefa & Ubeda, Luis, 2011.
"Framing effects in public goods: Prospect Theory and experimental evidence,"
Games and Economic Behavior, Elsevier, vol. 72(2), pages 439-447, June.
- Iñigo Iturbe Ormaetxe & Giovanni Ponti & Josefa Tomás & Luis Ubeda, 2008. "Framing Effects in Public Goods: Prospect Theory and Experimental Evidence," Working Papers. Serie AD 2008-15, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
- Ockenfels, Axel & Selten, Reinhard, 2014. "Impulse balance in the newsvendor game," Games and Economic Behavior, Elsevier, vol. 86(C), pages 237-247.
- repec:ebl:ecbull:v:3:y:2008:i:51:p:1-9 is not listed on IDEAS
- Cox, Caleb A., 2015. "Decomposing the effects of negative framing in linear public goods games," Economics Letters, Elsevier, vol. 126(C), pages 63-65.
- Edward Cartwright, 2016. "A comment on framing effects in linear public good games," Journal of the Economic Science Association, Springer;Economic Science Association, vol. 2(1), pages 73-84, May.
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- Sebastian Goerg & David Rand & Gari Walkowitz, 2017. "Framing effects in the Prisoner's Dilemma but not in the Dictator Game," Working Papers wp2017_02_01, Department of Economics, Florida State University.
- Buso, Irene Maria & Ferrari, Lorenzo & Güth, Werner & Lorè, Luisa & Spadoni, Lorenzo, 2024. "Testing isomorphic invariance across social dilemma games," Journal of Economic Behavior & Organization, Elsevier, vol. 223(C), pages 1-20.
- Federica Alberti & Anna Cartwright & Edward Cartwright, 2021. "Predicting Efficiency in Threshold Public Good Games: A Learning Direction Theory Approach," Working Papers in Economics & Finance 2021-01, University of Portsmouth, Portsmouth Business School, Economics and Finance Subject Group.
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- Ginzburg, Boris, 2019. "Slacktivism," MPRA Paper 94606, University Library of Munich, Germany.
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- Ginzburg, Boris & Guerra, Jose Alberto & Lekfuangfu, Warn N., 2023. "Critical mass in collective action," Documentos CEDE 20819, Universidad de los Andes, Facultad de Economía, CEDE.
- Funashima, Yoshito, 2022. "Efficiency and group size in the voluntary provision of public goods with threshold preference," Research in Economics, Elsevier, vol. 76(3), pages 237-251.
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