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IEHAS Research Group on Game Theory

Members of the Research Group on Game Theory at the Institute of Economics, Hungarian Academy of Sciences.. These are publications listed in RePEc written by members of this list who are registered with the RePEc Author Service. This list is managed by László Á. Kóczy . You can also create a list here. Register yourself. This page is updated in the first days of each month, at least.
| Working papers | Journal articles | Books | Chapters |

These are the members of this list (there may be more, only those with publications are listed here):

  1. Dóra Balog
  2. Péter Biró
  3. Péter Csóka
  4. Helga Habis
  5. László Á. Kóczy
  6. Anna Ráhel Radványi
  7. Andras Simonovits
  8. Robert Somogyi
  9. Balázs Sziklai

Working papers

2012

  1. P‚ter Bir¢ & Matthijs Bomhoff & Walter Kern & Petr A. Golovach & Dani‰l Paulusma, 2012. "Solutions for the Stable Roommates Problem with Payments," IEHAS Discussion Papers 1211, Institute of Economics, Hungarian Academy of Sciences.
  2. László Á. Kóczy & Péter Biró & Balázs Sziklai, 2012. "Fair apportionment of voting districts in Hungary?," Working Paper Series 1204, Óbuda University, Keleti Faculty of Business and Management.
  3. Habis , Helga & Csercsik, Dávid, 2012. "Cooperation with Externalities and Uncertainty," Working Papers 2012:27, Lund University, Department of Economics.
  4. László Á. Kóczy & Alexandru Nichifor, 2012. "The Intellectual Influence of Economic Journals: Quality versus Quantity," Working Paper Series 1202, Óbuda University, Keleti Faculty of Business and Management.
  5. Zsombor Z. Méder & András Simonovits & János Vincze, 2012. "Tax Morale and Tax Evasion: Social Preferences and Bounded Rationality," Working Papers 1202, Department of Mathematical Economics and Economic Analysis, Corvinus University of Budapest.
  6. Andr s Simonovits, 2012. "Optimal Cap on Pension Contributions," IEHAS Discussion Papers 1208, Institute of Economics, Hungarian Academy of Sciences.

2011

  1. Dora Balog, 2011. "Capital allocation in financial institutions: the Euler method," IEHAS Discussion Papers 1126, Institute of Economics, Hungarian Academy of Sciences.
  2. Peter Biro & Gethin Norman, 2011. "Analysis of Stochastic Matching Markets," IEHAS Discussion Papers 1132, Institute of Economics, Hungarian Academy of Sciences.
  3. Peter Biro & Flip Klijn, 2011. "Matching with Couples: a Multidisciplinary Survey," IEHAS Discussion Papers 1139, Institute of Economics, Hungarian Academy of Sciences.
  4. Peter Biro & Walter Kern & Daniel Paulusma, 2011. "Computing Solutions for Matching Games," IEHAS Discussion Papers 1142, Institute of Economics, Hungarian Academy of Sciences.
  5. Helga Habis & P. Jean-Jacques Herings, 2011. "Core Concepts for Incomplete Market Economies," IEHAS Discussion Papers 1119, Institute of Economics, Hungarian Academy of Sciences.
  6. Habis Helga & Herings P. Jean-Jacques, 2011. "Stochastic Bankruptcy Games," Research Memoranda 045, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  7. László Á. Kóczy & Dávid Csercsik, 2011. "Externalities in the games over electrical power transmission networks," Working Paper Series 1103, Óbuda University, Keleti Faculty of Business and Management.
  8. László Á. Kóczy & Miklós Pintér, 2011. "The men who weren't even there: Legislative voting with absentees," Working Paper Series 1104, Óbuda University, Keleti Faculty of Business and Management.
  9. Márkus, Judit & Pintér, Miklós & Radványi, Anna, 2011. "The Shapley value for airport and irrigation games," MPRA Paper 30031, University Library of Munich, Germany.
  10. Barnabas M. Garay & Andras Simonovits & Janos Toth, 2011. "Local Interaction in Tax Evasion," IEHAS Discussion Papers 1104, Institute of Economics, Hungarian Academy of Sciences.
  11. Andras Simonovits, 2011. "The Mandatory Private Pension Pillar in Hungary: An Obituary," IEHAS Discussion Papers 1112, Institute of Economics, Hungarian Academy of Sciences.
  12. Andras Simonovits, 2011. "International Economic Crisis and the Hungarian Pension Reform," IEHAS Discussion Papers 1111, Institute of Economics, Hungarian Academy of Sciences.
  13. Andras Simonovits, 2011. "Higher tax morale implies a higher optimal income tax rate," IEHAS Discussion Papers 1137, Institute of Economics, Hungarian Academy of Sciences.
  14. Robert Somogyi & Janos Vincze, 2011. "Price Rigidity and Strategic Uncertainty An Agent-based Approach," IEHAS Discussion Papers 1135, Institute of Economics, Hungarian Academy of Sciences.
  15. Tamas Fleiner & Balazs Sziklai, 2011. "Notes on the Bankruptcy Problem: an Application of Hydraulic Rationing," IEHAS Discussion Papers 1123, Institute of Economics, Hungarian Academy of Sciences.

2010

  1. Csóka, Péter & Pintér, Miklós, 2010. "On the impossibility of fair risk allocation," MPRA Paper 26515, University Library of Munich, Germany.
  2. Habis Helga & Herings P. Jean-Jacques, 2010. "Transferable Utility Games with Uncertainty," Research Memoranda 038, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  3. Habis Helga & Herings P. Jean-Jacques, 2010. "A Note on The Weak Sequential Core of Dynamic TU Games," Research Memoranda 022, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  4. Fabien Lange & László Á. Kóczy, 2010. "Power indices expressed in terms of minimal winning coalitions," Working Paper Series 1002, Óbuda University, Keleti Faculty of Business and Management.
  5. László Á. Kóczy & Alexandru Nichifor & Martin Strobel, 2010. "Intellectual Infl uence: Quality versus Quantity," Working Paper Series 1009, Óbuda University, Keleti Faculty of Business and Management.
  6. László Á. Kóczy, 2010. "Voting games with endogenously infeasible coalitions," Working Paper Series 1001, Óbuda University, Keleti Faculty of Business and Management.
  7. László Á. Kóczy & Martin Strobel, 2010. "The World Cup of Economics Journals: A Ranking by a Tournament Method," Working Paper Series 1011, Óbuda University, Keleti Faculty of Business and Management.
  8. László Á. Kóczy, 2010. "Prospects after the voting reform of the Lisbon Treaty," Working Paper Series 1012, Óbuda University, Keleti Faculty of Business and Management.
  9. László Á. Kóczy, 2010. "Lisszaboni kilátások," Working Paper Series 1014, Óbuda University, Keleti Faculty of Business and Management.
  10. László Á. Kóczy & Miklós Pintér, 2010. "Az ellenzék ereje: Általános súlyozott szavazási játékok," Working Paper Series 1013, Óbuda University, Keleti Faculty of Business and Management.
  11. Andras Simonovits, 2010. "Tax Morality and Progressive Wage Tax," IEHAS Discussion Papers 1005, Institute of Economics, Hungarian Academy of Sciences.

2009

  1. Péter Csóka & P. Jean-Jacques Herings & László Á. Kóczy & Miklós Pintér, 2009. "Convex and Exact Games with Non-transferable Utility," Working Paper Series 0904, Óbuda University, Keleti Faculty of Business and Management.
  2. Habis Helga & Herings P. Jean-Jacques, 2009. "Cooperation Under Incomplete Contracting," Research Memoranda 026, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  3. László Á. Kóczy, 2009. "Központi felvételi rendszerek: Taktikázás és stabilitás," Working Paper Series 0901, Óbuda University, Keleti Faculty of Business and Management.
  4. László Á. Kóczy & Alexandru Nichifor & Martin Strobel, 2009. "Article length bias in journal rankings," Working Paper Series 0902, Óbuda University, Keleti Faculty of Business and Management.
  5. László Á. Kóczy, 2009. "Measuring voting power: The paradox of new members vs the null player axiom," Working Paper Series 0903, Óbuda University, Keleti Faculty of Business and Management.
  6. László Á. Kóczy, 2009. "Stationary consistent equilibrium coalition structures constitute the recursive core," Working Paper Series 0905, Óbuda University, Keleti Faculty of Business and Management.
  7. Kóczy, László Á & Strobel, Martin, 2009. "The invariant method can be manipulated," Open Access publications from Maastricht University urn:nbn:nl:ui:27-23070, Maastricht University.
  8. Andras Simonovits, 2009. "When and How to Subsidize Tax-Favored Retirement Accounts?," IEHAS Discussion Papers 0902, Institute of Economics, Hungarian Academy of Sciences.
  9. Andras Simonovits, 2009. "Hungarian Pension System and its Reform," IEHAS Discussion Papers 0908, Institute of Economics, Hungarian Academy of Sciences.
  10. Andras Simonovits, 2009. "Underreported earnings and age-specific income redistribution in post-socialist economies," IEHAS Discussion Papers 0927, Institute of Economics, Hungarian Academy of Sciences.
  11. Andras Simonovits, 2009. "Pension Reforms in an Aging Society: A Fully Displayed Cohort Model," IEHAS Discussion Papers 0917, Institute of Economics, Hungarian Academy of Sciences.
  12. Andras Simonovits, 2009. "A Simple Model of Tax-Favored Retirement Accounts," IEHAS Discussion Papers 0915, Institute of Economics, Hungarian Academy of Sciences.

2008

  1. Csoka, Peter, 2008. "Risk management from a microeconomic perspective," Open Access publications from Maastricht University urn:nbn:nl:ui:27-16918, Maastricht University.
  2. Kóczy, László Á., 2008. "Stationary quasi-perfect equilibrium partitions constitute the recursive core," Research Memoranda 028, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  3. László Á. Kóczy, 2008. "Proportional power is free from paradoxes," Working Paper Series 0806, Óbuda University, Keleti Faculty of Business and Management, revised May 2008.
  4. Andras Simonovits, 2008. "Underreported Earnings and Old-Age Pension: An Elementary Model," IEHAS Discussion Papers 0805, Institute of Economics, Hungarian Academy of Sciences.

2007

  1. Péter Csóka & P. Jean-Jacques Herings & László Á. Kóczy, 2007. "Stable Allocations of Risk," Working Paper Series 0802, Óbuda University, Keleti Faculty of Business and Management, revised Apr 2008.
  2. Csóka, Péter & Herings, P. Jean-Jacques & Kóczy, László Á., 2007. "Balancedness Conditions for Exact Games," Research Memoranda 039, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  3. László Á. Kóczy & Martin Strobel, 2007. "The Invariant Method is Manipulable," Working Paper Series 0804, Óbuda University, Keleti Faculty of Business and Management, revised May 2008.

2006

  1. Csóka, Péter & Herings, P. Jean-Jacques & Kóczy, László Á., 2006. "Coherent Measures of Risk from a General Equilibrium Perspective," Research Memoranda 016, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  2. Kóczy, Lászlo Á., 2006. "Sequential Coalition Formation and the Core in the Presence of Externalities," Research Memoranda 047, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  3. Kóczy, László Á., 2006. "Strategic power indices: Quarrelling in coalitions," Research Memoranda 049, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  4. Kóczy, Lászlo Á., 2006. "Voting Paradoxes and the Human Intuition," Research Memoranda 048, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  5. Kóczy, László Á, 2006. "A recursive core for partition function form games," Research Memoranda 031, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  6. András Simonovits, 2006. "Social Security Reform in the US: Lessons from Hungary," IEHAS Discussion Papers 0602, Institute of Economics, Hungarian Academy of Sciences, revised 24 Apr 2006.
  7. Balla, Katalin & Kollo, Janos & Simonovits, András, 2006. "Transition with Heterogeneous Labor," IZA Discussion Papers 2179, Institute for the Study of Labor (IZA).

2005

  1. Kóczy,László Á., 2005. "Strategic Aspects of the 1995 and 2004 EU Enlargements," Research Memoranda 043, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.
  2. Kóczy,László Á., 2005. "The Core Can Be Accessed with a Bounded Number of Blocks," Research Memoranda 042, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization.

2004

  1. András Simonovits, 2004. "Designing Benefit Rules for Flexible Retirement with or without Redistribution," CESifo Working Paper Series 1370, CESifo Group Munich.

2003

  1. László Á. Kóczy, 2003. "The Core of a Normal Form Game," Game Theory and Information 0302002, EconWPA.

2002

  1. László Á. Kóczy, 2002. "The Core Can Be Accessed in a Bounded Number of Steps," Game Theory and Information 0202001, EconWPA, revised 04 Feb 2002.
  2. László Á. Kóczy, 2002. "A Note on Funaki and Yamato's Tragedy of the Commons," Game Theory and Information 0203006, EconWPA.
  3. László Á. Kóczy & Luc Lauwers, 2002. "The Minimal Dominant Set is a Non-Empty Core-Extension," Game Theory and Information 0210002, EconWPA.
  4. Simonovits, András, 2002. "Hungarian Pension System: The Permanet Reform," Discussion Paper 61, Center for Intergenerational Studies, Institute of Economic Research, Hitotsubashi University.

2001

  1. László Á. Kóczy, 2001. "The Core of a Partition Function Game," Game Theory and Information 0012004, EconWPA.
  2. László Á. Kóczy & Luc Lauwers, 2001. "The Coalition Structure Core is Accessible," Game Theory and Information 0110001, EconWPA, revised 26 Jun 2002.
  3. László Á. Kóczy, 2001. "Accession Games: A Dynamic Per-Member Partition Function Aapproach," Game Theory and Information 0111002, EconWPA.

1999

  1. Andras Simonovits, 1999. "The New Hungarian Pension System and its Problems," IEHAS Discussion Papers 9901, Institute of Economics, Hungarian Academy of Sciences.

1993

  1. Simonovits, A., 1993. "Intercohort Hetergeneneity and Optimal Social Insurance Systems," Papers 9349, Tilburg - Center for Economic Research.
  2. Simonovits, A., 1993. "Intercohort Heterogeneity and Optimal Social Insurance Systems," Discussion Paper 1993-49, Tilburg University, Center for Economic Research.

1992

  1. Simonovits, A., 1992. "Indexation of Pensions in Hungary: A Simple Cohort Model," Papers 9216, Tilburg - Center for Economic Research.

Journal articles

2012

  1. Péter Biró & Walter Kern & Daniël Paulusma, 2012. "Computing solutions for matching games," International Journal of Game Theory, Springer, vol. 41(1), pages 75-90, February.
  2. Kóczy, László Á., 2012. "Beyond Lisbon: Demographic trends and voting power in the European Union Council of Ministers," Mathematical Social Sciences, Elsevier, vol. 63(2), pages 152-158.
  3. Garay, Barnabás M. & Simonovits, András & Tóth, János, 2012. "Local interaction in tax evasion," Economics Letters, Elsevier, vol. 115(3), pages 412-415.
  4. Zsombor Z. Méder & András Simonovits & János Vinczeb, 2012. "Tax Morale and Tax Evasion: Social Preferences and Bounded Rationality," Economic Analysis and Policy (EAP), Queensland University of Technology (QUT), School of Economics and Finance, vol. 42(2), pages 171-188, September.
  5. Andras Simonovits, 2012. "Pension Reforms in an Aging Society: A Fully Displayed Cohort Model," DANUBE: Law and Economics Review, European Association Comenius - EACO, issue 4, pages 1-30, December.
  6. Tamás Fleiner & Balázs Sziklai, 2012. "The Nucleolus Of The Bankruptcy Problem By Hydraulic Rationing," International Game Theory Review (IGTR), World Scientific Publishing Co. Pte. Ltd., vol. 14(01), pages 1250007-1-1.

2011

  1. Csóka, Péter & Jean-Jacques Herings, P. & Kóczy, László Á. & Pintér, Miklós, 2011. "Convex and exact games with non-transferable utility," European Journal of Operational Research, Elsevier, vol. 209(1), pages 57-62, February.
  2. Habis, Helga & Herings, P. Jean-Jacques, 2011. "Transferable utility games with uncertainty," Journal of Economic Theory, Elsevier, vol. 146(5), pages 2126-2139, September.
  3. Habis, Helga & Herings, P. Jean-Jacques, 2011. "Core concepts for incomplete market economies," Journal of Mathematical Economics, Elsevier, vol. 47(4-5), pages 595-609.
  4. Simonovits, András, 2011. "When are voluntary pensions indifferent?," Economics Letters, Elsevier, vol. 111(2), pages 155-157, May.

2010

  1. Helga Habis & P. Jean-Jacques Herings, 2010. "A Note On The Weak Sequential Core Of Dynamic Tu Games," International Game Theory Review (IGTR), World Scientific Publishing Co. Pte. Ltd., vol. 12(04), pages 407-416.

2009

  1. Csóka, Péter & Herings, P. Jean-Jacques & Kóczy, László Á., 2009. "Stable allocations of risk," Games and Economic Behavior, Elsevier, vol. 67(1), pages 266-276, September.
  2. Kóczy, László Á., 2009. "Sequential coalition formation and the core in the presence of externalities," Games and Economic Behavior, Elsevier, vol. 66(1), pages 559-565, May.

2008

  1. Péter Biró & Katarína Cechlárová & Tamás Fleiner, 2008. "The dynamics of stable matchings and half-matchings for the stable marriage and roommates problems," International Journal of Game Theory, Springer, vol. 36(3), pages 333-352, March.
  2. Balla, Katalin & Köllo, János & Simonovits, András, 2008. "Transition with heterogeneous labor," Structural Change and Economic Dynamics, Elsevier, vol. 19(3), pages 203-220, September.

2007

  1. Csoka, Peter & Herings, P. Jean-Jacques & Koczy, Laszlo A., 2007. "Coherent measures of risk from a general equilibrium perspective," Journal of Banking & Finance, Elsevier, vol. 31(8), pages 2517-2534, August.
  2. László Kóczy, 2007. "A recursive core for partition function form games," Theory and Decision, Springer, vol. 63(1), pages 41-51, August.
  3. Koczy, Laszlo A. & Lauwers, Luc, 2007. "The minimal dominant set is a non-empty core-extension," Games and Economic Behavior, Elsevier, vol. 61(2), pages 277-298, November.
  4. Simonovits, Andras, 2007. "Can population ageing imply a smaller welfare state?," European Journal of Political Economy, Elsevier, vol. 23(2), pages 534-541, June.

2006

  1. Koczy, Laszlo A., 2006. "The core can be accessed with a bounded number of blocks," Journal of Mathematical Economics, Elsevier, vol. 43(1), pages 56-64, December.
  2. András Simonovits, 2006. "Optimal Design of Pension Rule with Flexible Retirement: The Two-Type Case," Journal of Economics, Springer, vol. 89(3), pages 197-222, December.

2004

  1. Koczy, Laszlo A. & Lauwers, Luc, 2004. "The coalition structure core is accessible," Games and Economic Behavior, Elsevier, vol. 48(1), pages 86-93, July.

2003

  1. Simonovits, Andr S, 2003. "Designing optimal linear rules for flexible retirement," Journal of Pension Economics and Finance, Cambridge University Press, vol. 2(03), pages 273-293, November.

2002

  1. László Á. Kóczy, 2002. "The Core in a Normal Form Game," Economics Bulletin, AccessEcon, vol. 28(9), pages A0.

2001

  1. László Kóczy, 2001. "The core in the presence of externalities," Economics Bulletin, AccessEcon, vol. 28(23), pages A0.

2000

  1. András Simonovits, 2000. "Partial privatization of a pension system: lessons from Hungary," Journal of International Development, John Wiley & Sons, Ltd., vol. 12(4), pages 519-529.

1999

  1. Simonovits, Andras, 1999. "Are there cycles in realistic overlapping cohorts models?," Structural Change and Economic Dynamics, Elsevier, vol. 10(2), pages 261-275, June.
  2. Andr� Simonovits, 1999. "Linear Decentralized Control with Expectations," Economic Systems Research, Taylor and Francis Journals, vol. 11(3), pages 321-330.

1998

  1. ErdÅ‘s, P., Joó, I. & Kóczy, L.Ã., 1998. "A characterisation theorem of the logarithmic function modulo 1," Pure Mathematics and Applications, Department of Mathematics, Corvinus University of Budapest, vol. 9(3-4), pages 311-318.
  2. Molnar, Gyorgy & Simonovits, Andras, 1998. "Expectations, (in)stability and (in)viability in realistic overlapping cohorts models," Journal of Economic Dynamics and Control, Elsevier, vol. 23(2), pages 303-332, September.
  3. Gyorgy Molnar & Andras Simonovits, 1998. "The Subdominant Eigenvalue of a Large Stochastic Matrix," Economic Systems Research, Taylor and Francis Journals, vol. 10(1), pages 79-82.

1995

  1. Hommes, Cars H. & Nusse, Helena E. & Simonovits, Andras, 1995. "Cycles and chaos in a socialist economy," Journal of Economic Dynamics and Control, Elsevier, vol. 19(1-2), pages 155-179.
  2. Simonovits, Andras, 1995. "Three economic applications of Chebyshev's algebraic inequality," Mathematical Social Sciences, Elsevier, vol. 30(3), pages 207-220, December.

1993

  1. B. Frey & G. Bamberg & G. Duménil & D. Lévy & C. Kuhner & E. Janeba & O. Bouin & A. Simonovits & J. Schulenburg, 1993. "Book reviews," Journal of Economics, Springer, vol. 57(3), pages 305-323, October.

1991

  1. Simonovits, Andras, 1991. "Investments, starts, and cycles in socialist economies: A mathematical model," Journal of Comparative Economics, Elsevier, vol. 15(3), pages 460-475, September.
  2. Simonovits, A, 1991. " Investment Limit Cycles in a Socialist Economy," Economic Change and Restructuring, Springer, vol. 24(1), pages 27-46.

1989

  1. Simonovits, Andras, 1989. " Keynesian Issues and Economic Theory: Comment," Scandinavian Journal of Economics, Wiley Blackwell, vol. 91(2), pages 301-06.
  2. Simonovits, Andras, 1989. " Hidden Investment Cycles in Socialist Economies," Scandinavian Journal of Economics, Wiley Blackwell, vol. 91(3), pages 583-97.

1986

  1. Simonovits, Andras, 1986. " Growth, Control and Tensions in an Open Socialist Economy," Economic Change and Restructuring, Springer, vol. 20(3), pages 145-61.

1982

  1. Simonovits, Andras, 1982. " Buffer Stocks and Naive Expectations in a Non-Walrasian Dynamic Macromodel: Stability, Cyclicity and Chaos," Scandinavian Journal of Economics, Wiley Blackwell, vol. 84(4), pages 571-81.

1981

  1. Simonovits, Andras, 1981. "Maximal convergence speed of decentralized control," Journal of Economic Dynamics and Control, Elsevier, vol. 3(1), pages 51-64, November.

1978

  1. Simonovits, Andras, 1978. "A Note on "Marx in the Light of Modern Economic Theory" by M. Morishima," Econometrica, Econometric Society, vol. 46(5), pages 1239-41, September.

1977

  1. Kornai, Janos & Simonovits, Andras, 1977. "Decentralized control problems in neumann-economies," Journal of Economic Theory, Elsevier, vol. 14(1), pages 44-67, February.

1976

  1. András Simonovits, 1976. "Some Properties of a Decentralized Adjustment Process," Management Science, INFORMS, vol. 22(8), pages 883-891, April.

1975

  1. Simonovits, A, 1975. "A Note on the Underestimation and Overestimation of the Leontief Inverse," Econometrica, Econometric Society, vol. 43(3), pages 493-98, May.

Books

2000

  1. Eric S. Maskin & András Simonovits (ed.), 2000. "Planning, Shortage, and Transformation: Essays in Honor of János Kornai," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262133571.

Chapters

2010

  1. Dóra Balog, 2010. "Risk based capital allocation," Proceedings of FIKUSZ '10, in: László Áron Kóczy (ed.), Proceedings of FIKUSZ 2010, pages 17-26 Óbuda University, Keleti Faculty of Business and Management.