Research staff

Balogh, Anikó researcher
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Anikó Bernát, researcher
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Blanka Páthy-Dencső, researcher
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Márton Medgyesi
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Tamás Keller
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Bori Simonovits, researcher
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TÁRKI Social Research Inc. is an independent, employee-owned research organisation that specialises in policy research in the fields of social policy and the social consequences of economic policies. This includes related data-collection, archiving and statistical activities. We recently increased our involvement in the areas of strategic market research and health policy analysis. In addition, we regularly contribute to basic research, in the areas of social stratification and inequality, and to the methodology of empirical social research.

Board of Directors

Tamás Kolosi, founder and president of TÁRKI
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Tamás Rudas, academic director of TÁRKI
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István György Tóth, C.E.O. of TÁRKI
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Senior Staff

Zoltán Fábián, director of Data Archive and IT
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András Gábos, senior researcher
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Róbert Iván Gál, senior researcher
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Péter Róbert, senior researcher
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Matild Sági, senior researcher
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Endre Sik, senior researcher
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Péter Szivós, managing director
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Tamás Rudas - academic director

Tamás Rudas is the Academic Director of TARKI. He is also Professor of Statistics and the Dean of the Faculty of Social Sciences of the Eötvös Loránd University (ELTE ). Professor Rudas was one of the first researchers who applied multivariate statistical methods for the analysis of survey data in Hungary. He developed new approaches to the analysis of categorical data, in the areas of log-linear and marginal modelling and measurement of model fit. His books in English and Hungarian on the methods of survey research and statistics are widely used textbooks. He served as visiting professor at several European and American universitites, including the Pennsylvania State University, the University of Washington, the Technical University of Graz, the University of Ljubljana and he published papers in many of the leading statistics and social science methodology journals, including the Annals of Statistics, the Jounal of the Royal Statistical Society, Sociological Methodology, Quality and Quantity. Professor Rudas is the General Secretary of the European Association of Methodology .

Present positions

• Academic director of TÁRKI
• Professor of Statistics ELTE University
• Dean, Faculty of Social Sciences
• Head, Department of Statistics

Degrees

Employment history

Visiting professorships, fellowships and courses

May 1986 - July 1986: Institute of Anthropology and Human Genetics, University of Heidelberg, Germany, DAAD-fellow April 1987 - June 1987: Department of Theoretical Statistics, Institute of Mathematics, University of Aarhus, Denmark, Hungarian-Danish Exchange Programme Fellow August 1989 -May 1990: Department of Statistics, The Pennsylvania State University, USA Visiting Professor September 1992 - August 1993: Department of Mathematics, The University of Toledo, USA Visiting Professor August 1994 - September 1994: Statistics and Pscyhometry Research Division Educational Testing Service, Princeton, USA, Visiting Scholar September1995 - October 1995: Center for Surveys, Methods and Analyses (ZUMA) Mannheim, Germany, Visiting Professor March 1997 - June 1997: Department of Mathematics, The University of Toledo, USA Visiting Professor September 1999 - October 1999 Fields Institute, University of Toronto, Canada Visiting Member October 1999 - January 2000: Institute of Statistics, Technical University of Graz, Austria Visiting Professor May 2000 Center for Social Studies, Central European University, Warsaw, Poland Visiting Professor May 2001 - June 2001 Center for Social Studies, Central European University, Warsaw, Poland Visiting Professor May 2002 - June 2002 Center for Social Studies, Central European University, Warsaw, Poland Visiting Professor January 2003 University of Erfurt, Germany Visiting Professor March 2003 Zentralarchiv fuer Empirische Sozialforshung, Universitat Koeln Short course November 2003: University of Ljubljana, Visiting Professor January 2004: Universirty of Torino, Short course May 2004: Center for Social Studies, Warsaw, Visiting Professor August 2004 Essex Summer School in Social Science Data Analysis and Collection Short course

Adjunct (part time) positions

1985-86 Dept. of Human Genetics, National Institute of Health, Budapest Research Associate
1986- TARKI Social Research Center
1986-88 Research Associate and Head of the Research Group 'Statistical analysis of categorical data'
1989-96 Senior Research Fellow and Head, Dept. of Mathematical Statistics 1996-98 Senior Research Fellow
1998- Academic Director
1994-96 Department of Political Science, The Central European University, Budapest Recurrent Visiting Associate Professor of Political Science and Statistics
1996-99 Statistics Group, Institute of Sociology, Eotvos Lorand University, Budapest Reader and Program Director
1999- Department of Political Science, The Central European University, Budapest Professor of Statistics

Colloquia presentations

1987: University of Wiesbaden. 1988: University of California at Los Angeles, Iowa State University, University of Madison, Wisconsin, Pennsylvania State University, Educational Testing Service. 1993:University of Michigan, Iowa State University, University of Iowa. 1994:University of Toledo, Pennsylvania State University, Educational Testing Service, Hershey Medical Center, University of Delaware.1995: Center for Surveys and Methods (ZUMA), University of Toledo, University of Pennsylvania, University of Delaware, Hershey Medical Center, Pennsylvania State University, University of Iowa, University of Illinois at Urbana-Champaign. 1996: Center for Surveys and Methods (ZUMA), University of Tilburg, University of Essex. 1997: University of Ljubljana, Gallup Research Center and University of Nebraska. 2000: University of Graz, London School of Economics. 2001: University of Perugia (two talks), University of Roma Tre. 2004: Technical University of Turin.

Conference presentations

Invited or plenary:

1986, 1990, 1992: Workshop on Graphical Association Models, Wiesbaden.1988: Workshop on Graphical Association Models, Aalborg. 1995: Workshop on the Analysis of Large Data Sets, Oxford; International Conference on Statistics and Methodology, Preddvor. 1996: Workshop on Latent Variable Models,Wiesbaden; Conference on Statistics and Social Science, State College. 1997: Symposion on the Analysis of Categorical Data, Tilburg.1998: Conference on Statistical Issues in the Social Sciences, Stockholm. 1999: Workshop on Conditional Independence Structures and Graphical Models, Toronto, Seminar on Relating Causal Structure to Conditional Independence Structure, Toronto. 2000: 5th International Conference on Social Science Methodology, Köln (two talks), Research Kitchen on Learning Graphical Models, Trest, 2001: Microsimulation Methodology, Budapest, 2002: International Conference on Methodology and Statistics, Ljubljana, 2004: 24th Biannual Conference of the Society for Multivariate Analysis in the Behavioral Sciences
Contributed:

1984: Colloquium on Goodness-of-fit, Debrecen; COMPSTAT 84, Prague. 1985:Session of the International Statistical Institute, 1986: COMPSTAT 86,Rome; World Congress of the Bernoulli Society, Tashkent. 1987: European Meeting of Statisticians, Thessaloniki; Satellite Meeting of the EMS,Thessaloniki.1988: International Conference on Social Science Methodology, Dubrovnik; European Meeting of Statisticians, Berlin. 1989: International Workshop on Social Science Methodology, Ruegen. 1989: SoftStat 89, Heidelberg; CASOR, Dresden*. 1990: COMPSTAT 90, Dubrovnik; International Conference of the Biometric Societey, Budapest. 1991: Workshop on Statistical Modelling, Utrecht; International Conference of the Psychometric Society, Trier. 1992 International Conference on Social Science Methodology, Trento. 1993: Conference on the Analysis of Categorical Longitudinal Data, State College. 1994: World Congress of the International Sociological Association, Bielefeld. 1995: International Conference on the Visualisation of Categorical Data, Köln; Workshop on Mixture Models, Aussois; H. A. David Conference, Ames. 1996 European Conference on Highly Structured Stochastic Systems, Rebild. 1997: International Conference on Statistical Analysis Based on the L1 Norm, Neuchatel; International Conference on Applied Statistics, Preddvor. 1998: Conference on Network Analysis, Barcelona*; 21st Biennial Conference of the Society for Multivariate Analysis in the Behavioural Sciences, Leuven; 13th International Workshop on Statistical Modeling, New Orleans; Workshop on Microsimulation Methodology, Cambridge*; Prague Stochastics 98, Prague; Workshop on Structural Learning in Graphical Models, Tirano; Conference of the Society for Economic Modelling, Matrafured*. 1999: Large Scale Data Analysis, Köln, International Conference on Applied Statistics, Preddvor*, HUSITA*, Budapest. 2000: ; 22nd Biennial Conference of the Society for Multivariate Analysis in the Behavioural Sciences, London; 8th Zittau Fuzzy Colloquium, Zittau*, 4th Conference on Distributions with Given Marginals and Statistical Modeling, Barcelolna*; 5th International Conference on Social Science Methodology, Köln* (two talks), Conference Foundations and Aplications of Statistics, Jerusalem*. 2001: 16th International Workshop on Statistical Modeling, Odense*, Conference of the Psychometric Society, Osaka*, International Symposium on Information Theory, Washington* International Conference on Applied Statistics, Ljubljana, 2002: 23rd Biennial Conference of the Society for Multivariate Analysis in the Behavioural Sciences, Tilburg, 2003:Joint Statistical Meetings, San Francisco
(*: talk presented by co-author)

Publications (selected list):

Rudas, T. (2004) Probability Theory: a Primer. Sage Publ., Thousand Oaks , CA (in press).

Rudas, T. (2003) Law of large numbers, Prior probability, Probabilistic, Probability density function, Probability value, Probability. Articles in: Lewis-Beck, M., Bryman, A. E., Liao, T. F. (eds.) The SAGE Encyclopedia of Social Science Research Methods, Sage Publ., Thousand Oaks, CA.

Rudas, T. (2002) Canonical representation of log-linear models. Communications in Statistics (Theory and Methods), 31, 2311-2323.

Bergsma, W. P., Rudas, T. (2002) Marginal models for categorical data. Annals of Statistics, 30, 140-159.

Rudas, T. (2002) A latent class approach to measuring the fit of a statistical model. Invited chapter in Hagenaars, J., McCutcheon, A. (eds.) Applied Latent Class Analysis, Cambridge University Press.

Bergsma, P, Rudas, T. (2002) Modeling conditional and marginal association in contingency tables. Ann. Fac. Sci. Tolulouse Math. (6) 11, 443-454.

Németh, R., Rudas, T. (2002) Sample selection with the Kish grid. Statisztikai Szemle, 80, 309-327. (Hung.)

Bergsma, W., Rudas, T. (2002) Variation independent parameterizations of multivariate categorical distributions. In: Cuadras, C. M., Fortiana, J., Rodriguez-Lallena, J. A. (eds.) Distributions with Given Marginals and Statistical Modelling. Kluwer, 21-27

Verdes, E., Rudas, T. (2002) The ?* Index as a New Alternative for Assessing Goodness od Fit of Logistic Regression. In: Haitovsky, Y., Lerche, H. R., Ritov, Y. (eds.) Foundations of Statistical Inference. Springer, 167-177.

Rudas, T., Bergsma, W. P. (2001) On generalized symmetry. The Quasi Symmetry Project.

Rudas, T. (1999) The mixture index of fit and minimax regression. Metrika, 50, 163-172.

Rudas, T. (1998) A new algorithm for the maximum likelihood estimation of graphical log-linear models. Computational Statistics, 13, 529-537.

Rudas, T. (1998) Odds Ratios in the Analysis of Contingency Tables. Sage Publ., Thousand Oaks, CA.

Rudas, T. (1998) Opinion Polls: A User's Guide. Uj Mandatum, Budapest (Hung.)

Clogg, C.C., Rudas, T., Matthews, S. (1997) Analysis of model misfit, structure, and local structure in contingency tables using graphical displays based on the mixture index of fit. in Blasius, J., Greenacre, M.(eds.) Visualization of Categorical Data, 425-439, Academic Press.

Rudas, T., Zwick, R. (1997) Estimating the importance of differential item functioning. Journal of Educational and Behavioral Statistics, 22, 31-45.

Vargha, A., Rudas, T. Delaney, H. D., Maxwell, S. E. (1996) Dichotomization, partial correlation, and conditional independence. Journal of Educational and Behavioral Statistics, 21, 264-282.

Clogg, C. C., Rudas, T., Xi, L. (1995) A new index of structure for the analysis of models for mobility tables and other cross-classifications. in: P. Marsden (ed.) Sociological Methodology 1995, 197-222, Blackwell, Oxford.

Rudas, T., Clogg., C. C., Lindsay, B. G. (1994) A new index of fit based on mixture methods for the analysis of contingency tables. Journal of the Royal Statistical Society, B, 56, No 4, 623-639.

Rudas, T. (ed.) (1992) DISTAN 2.0 Manual. Social Science Informatics Center, Budapest

Rudas, T., Leimer, H.-G. (1992) Analysis of contingency tables with known conditional odds ratios or known log-linear parameters. in: Francis, B., Seeberg, G. U. H., van der Heijden, P. G. M., Jansen, W. (eds.) Statistical Modeling, 313-322, Elsevier.

Rudas, T. (1991) Prescribed conditional interaction structure models with application to the analysis of mobility tables. Quality & Quantity 25, 345-358.

Rudas, T. (1990) Contribution to the discussion of the papers by Wermuth and Lauritzen and Edwards. Journal of the Royal Statistical Society (Ser B), 52, 55-56.

Bornemisza, E., Rudas, T. (1990) The DISTAN package for discrete statistical analysis in: Gladitz, Troitzsch (eds.) Computer Aided Sociological Research - CASOR 89, 155-162, Akademie Verlag, Berlin.

Rudas, T. (1990) DISTAN for discrete statistical analysis. in: Faulbaum, Haux, Jockel (eds.) SoftStat'89, Fortschritte der Statistik-Software 2, 144-154, Gustav Fischer Verlag, Suttgart, New York.

Kis-Varga, A., Rudas, T., Czeizel, A. (1989) A new approach to the germinal mutation surveillance: a pair-wise evaluation of component elements in unidentified multiple congenital abnormalities. Mutation Research, 238, 87-97.

Kolosi, T., Rudas, T. (1988) Empirical Problem Solution in Sociology. OMIKK-TARKI, Budapest (Hung.).

Czeizel, A., Sankaranarayanan, K., Losonci, A., Rudas, T., Keresztes, M. (1988) The load of genetic and partially genetic diseases in man II. Some selected common multifactorial diseases: estimates of population prevalence and of detriment in terms of years lost and impaired life. Mutation Research, 196, 259-292.