Statistical Disclosure Control

The CASC project team

Institute Short Country Flag
Statistics Netherlands CBS NL
Istituto Nationale di Statistica ISTAT I
University of Plymouth UoP UK
Office for National Statistics ONS UK
University of Southampton SOTON UK
The Victoria University of Manchester UNIMAN UK
Statistisches Bundesamt StBA D
University La Laguna ULL ES
Institut d’Estadistica de Catalunya IDESCAT ES
Institut National de Estadística INE ES
TU Ilmenau TUIlm D
Institut d’Investigació en Intelligència Artificial-CSIC CIS ES
Universitat Rovira i Virgili URV ES
Universitat Politècnica de Catalunya UPC ES

Statistics Netherlands
Statistics Netherlands is the main-contractor of the CASC-project. It bares the overall responsibilities for the project. The main activities of Statistics Netherlands are the further development of the ARGUS software.

Anco Hundepool studied mathematics at Leyden University and subsequently he joined Statistics Netherlands. He started his career in the department for Statistical Methods. His main interests were seasonal adjustment, compilation of price index series and a pilot study on purchasing power statistics. After that he was involved in the development of the Blaise system, became a project-leader for the Abacus tabulation package and the STATview dissemination package.
Within the SDC-project, partially funded by the 4th Framework he was the project-leader for the development of the ARGUS package for statistical disclosure control. In the TADEQ project for the documentation of electronic questionnaires (also partially funded by the 4th Framework) he was responsible for the development of the TADEQ-software.
In the CASC project he is the overall project leader and continues the development of the ARGUS software.
Anco Hundepool presented his work on various conferences and has published in different refereed journals.
  Eric Schulte Nordholt studied mathematics at the University of Utrecht and econometrics at the Erasmus University Rotterdam. He started his career as a researcher at the Department of S tatistical Methods of Statistics Netherlands. In 1995 he worked as a detached national expert at the European Community Household Panel (ECHP) team of Eurostat in Luxembourg. Subsequently he became senior researcher at the Department of employees of the division of Socio-economic Statistics. His main interests are data editing, imputation, metadata systems, panel data and statistical disclosure control.
Aad van de Wetering has a long career at Statistics Netherlands. After his education he joined Statistics Netherlands and was involved in the automation from the 'stone age' of computers. He made tabulation software for our last census (1971) and from that period he has become an expert in tabulation. For the Blaise system he designed (with Alex van Buitenen and Anco Hundepool) the tabulation package Abacus. After that he became involved in the StatLine project. In the 4th Framework project TADEQ he was involved in the development of the TADEQ software for the automatic documentation of electronic questionnaires. His current interest is the further development of the ARGUS software.
Aad has a special interest in number theory and the Dutch language.
His favorite activity during the lunch-break is playing chess.
But after a long career at Statistics Netherlands Aad has decided that he will retire. Indeed from the January 1st Aad will no longer work at Statistics Netherlands and so his contribution to ARGUS has come to an end. It is a pity for ARGUS, but we are grateful for his contribution so far.
We hope that Aad will enjoy his retirement.

Aad van de Wetering homepage
  Ramya Ramaswamy has taken over from Aad the development of the kernel of ARGUS.

Istituto Nationale di Statistica

The role of ISTAT is in the research of micro data. Also IStat will organise the testing of the software products developed during this project. Luisa Franconi is a member of the CASC steering committee.

Luisa Franconi has an MA in Mathematics from the University of Perugia (Italy), an MSc in Computational Statistics from the University of Bath (UK) and a PhD in Statistics from the University of Trento (Italy).

From 1992 to 1994 she was a Research Officer at the School of Mathematical Sciences, University of Bath. Since 1994 she has been with the Servizio Studi Metodologici, Istituto Nazionale di Statistica (ISTAT) working on Statistical disclosure control (SDC) methodology. She has been head of the SDC methodology unit at ISTAT since 1998.

Luisa was a committee member of the Esprit Project no 20462 on SDC and was responsible for testing the ARGUS software and developing methodology for SDC. Luisa is the Istat representative on the Eurostat Task Force on Methodological Aspects of Confidentiality. Her publications include SDC methods in various conference proceedings and journals.

University of Plymouth
Role UoP

Dr Julian Stander has been working at the University of Plymouth since October 1993. He is a Principal Lecturer. He has a first class honours degree in Mathematics from the University of Oxford, a Diploma in Mathematical Statistics (with distinction and University prize) from the University of Cambridge, and a PhD from the University of Bath for a thesis entitled Some Topics in Statistical Image Analysis. Before coming to Plymouth, he held a Royal Society European Science Exchange Programme Fellowship at the Istituto per le Applicazioni del Calcolo, CNR, Rome. His present research interests include applied statistics, disease mapping, image analysis, Markov chain Monte Carlo methods and smoothing techniques. He has published a number of papers in international refereed journals.

Julian Stander homepage

Office for National Statistics
Role ONS

David Brown has degrees in Mathematics (BSc, University of Durham, 1966) and Statistics (MSc, Imperial College, London, 1967), and has been employed as a research/consultant statistician in the Natural Environment (1967-1976) and Biotechnology and Biological Science (formerly Agricultural) Research Councils (1976-2000). His most recent posts were Head of the Statistics Group, then of the Biomathematics and Computational Neuroscience Laboratory, at the Babraham Institute, Cambridge. He has numerous publications in statistics, biology and mathematics, including the book, 'Models in Biology: Mathematics, Statistics and Computing' (1993). He was co-ordinator of an EU Fourth Framework project involving statistical analysis of a neural system, and will have responsibility for Statistical Disclosure Control at the ONS from summer 2000.

After David's retirement Bill Gross took over the responsabilities for SDC at ONS

University of Southampton

Chris Skinner
Born 12/3/1953, British
Professor, Department of Social Statistics, University of Southampton since 1994
Lecturer, Senior Lecturer, 1978-1994
BA Mathematics, University of Cambridge, 1975
MSc Statistics, London School of Economics, 1976
PhD Social Statistics, University of Southampton, 1982
Publications include: C.J.Skinner, D.Holt and T.M.F.Smith, eds (1989) Analysis of Complex Surveys. Wiley

Chris Skinner homepage
  David J. Holmes
Born 4/11/57, British
Principal Experimental Officer, Department of Social Statistics, University of Southampton since 1992
Research Assistant, Research Fellow, Experimental Officer 1980-1992
BSc Mathematics, University of Exeter, 1979
MSc Applied Statistics, University of Southampton, 1980
PhD Social Statistics, University of Southampton, 1987
Publications include Skinner, C.J. and Holmes, D.J (1998) Estimating the re-identification risk per record in microdata. J.Official. Statist. 14, 361-372.

David Holmes homepage

University of Manchester

Professor Angela Dale is Director of the Cathie Marsh Centre for Census and Survey Research and Professor of Quantitative Social Research at the University of Manchester. She was a UK partner in the 4th Framework Social Disclosure Control Programme co-ordinated by Dr Leon Willenborg. She has a close involvement with issues around confidentiality and privacy and directs an ESRC-funded support and development programme for samples of anonymised records from the 1991 Census for the UK. She teaches a course on the secondary analysis of government surveys and census data and has published widely in this area.

Angela Dale homepage
Dr. Mark Elliot born April 1961, he has degrees in Psychology (B.A), Knowledge based systems (M. Sc.), and a PhD. in Artificial Intelligence. His previous research has been in the field of Natural Language Processing and Knowledge Engineering.
He has been working in the field of Statistical Disclosure Control (SDC) for four years. He has given papers on the topic at Statistical Confidentiality Conferences (Bled, Slovenia 1996, Lisbon, Portugal 1998, Washington 1999), as well a papers describing SDC at conferences on risk (Warwick, UK 1999) and record linkage (Washington, USA 1998). He has had papers published on SDC in Netherlands Official statistics and Research in Official Statistics and a further one forthcoming in the international Journal of Risk Management, with several more in preparation. He has just completed a one year project investigating a new technique for disclosure risk assessment (called Data Intrusion Simulation) under a one-year grant from the Economic and Social Research Council and is currently consulting to the US bureau of the Census on a four month project extent this technique to assess the impact of the full range of disclosure control techniques.

Mark Elliot homepage

Statistisches Bundesamt
Role StBA

Sarah Giessing studied mathematics and statistics at the Philipps University Marburg. After graduation she joined the Statistisches Bundesamt. She works in the Department of Mathematical Statistical Methods. She has carried out a major research project on software packages for tabular data protection and presented the results at various conferences and had several published papers on tabular data protection. She was involved in two task forces at StBA 'Improving the assessment of confidentiality for tabular data' and 'Improving GHQUAR'. She occasionally represented StBA in the Committee for Statistical Confidentiality of the European Commission and represents StBA in the task force on methodological aspects of statistical confidentiality of this committee.
Ruth Brand acquired her graduate in economics in 1992 at the University of Hannover with priorities in econometrics, insurance economics and labour economics. Since 1993 she was a lecturer at the University of Hannover. From 1993 - 1995 she worked in two different research projects: profit sharing and participation, the Hannover panel. Since 1995 she was employed at the subdivision of statistics. Her fields in research are data protection, statistical methods and labour dynamics. In the field of data protection she is working since 1995. Main topics are possibilities of anonymising business data and theoretical comparisons of the different approaches. For instance she evaluated the re-identification risks connected with disseminating data from the Hannover Panel and the IAB-Establishment-Panel and evaluated the possibilities of anonymising them by adding random noise in the way Sullivan/Fuller (1989) propose.
Dietz Repsilber graduated in physics. He joined LDS NRW in 1973. Apart from being involved in several other projects concerning software and methodology development, since 1978 he has been developing the software package GHQUAR for secondary cell suppression. Step by step, mostly driven by user demand, he added improvements to his system. Substantial progress was made after the international seminar on statistical confidentiality in Dublin 1992. Since 1999 he is in close co-operation with Eurostat. On behalf of Eurostat a PC-version of GHQUAR was developed. On particular r equest of Eurostat users he added several facilities intended to improve the usability of GHQUAR. Diez Repsilber was involved in the StBA task force 'Improving GHQUAR'. Currently, based on the recommendations of that task force, he is in the process of refining his package, making it applicable to sets of linked tables. He presented his package at two international seminars on statistical confidentiality (1992 and 1994) and had published papers (in German language) describing his method for secondary cell suppression.

University of La Laguna
Role ULL

Prof. Juan Jose Salazar Gonzalez is Associate Professor at DEIOC teaching Mathematical Programming in Mathematics and Engineering. He obtained his Ph.D. at University of Bologna (Italy) in 1992, and since them he has been involved in different National and European project inside Italian research groups. For example, he was in
· Models, algorithms and Systems for Decision Support (EC-Human Capital & Mobility Program, Contract Nr ERB CHR XCT 930087),
· DIMANET (DIscrete Mathematical NETwork), "Human Capital and Mobility" EC Network DIMANET Contract No: ERB CHR XCT 940429,
· SDC (Statistical Disclosure Control), supported by the Esprit programme, European Union (1995-1997).
He has been also in other EU programs, as the past Erasmus program (Italy, 1991) or the current Socrates Program "EU Socrates project" (Bruxells, 1999). He has organized several Internatical event, and he has also been visiting research at Columbia University, New York.

Juan Jose Salazar homepage
Prof. Matteo Fischetti (University of Padova, Italy) will collaborate in the ULL group. He received his PhD in Operations Research from the University of Bologna in 1987. In the same year he was received the first prize "Best Young Researcher", awarded by A.I.R.O. (the Italian Operations Research Society), and the prestigious first prize "Best Ph.D. Dissertation on Transportation", awarded by the Operations Research Society of America (the first prize awarded by O.R.S.A. for a Ph.D. thesis developed outside U.S.A.). In 1994 he won the first prize "FASTER", awarded by FS-Ferrovie dello Stato for the best computer code for solving very large set-covering problems arising in railway scheduling (jointly with P. Toth and A. Caprara), and in 1995 he received the first prize "FARO", awarded by FS-Ferrovie dello Stato for the best computer code for solving a bus-driver scheduling problem arising in railway applications (jointly with P. Toth, Vigo and A. Caprara). He is full professor in Operations Research at the Department of Electronics and Computer Science at the University of Padova. He was member of the international Program Committee for the meeting Integer Programming and Combinatorial Optimization, Copenhagen, May 1995, and plenary speaker at the Mathematical Programming Symposium, Lausanne, July 1997. His research interests include Combinatorial Optimization, Polyhedral Combinatorics, Statistical Disclosure Control, Integer Programming, Graph Theory, Design and Analysis of Combinatorial Algorithms, Vehicle Routing and Scheduling Problems.

Matteo Fischetti homepage
Prof. Giovanni Andreatta is Full Professor of Operations Research, Faculty of Statistical Sciences, University of Padova, Italy, and several times Visiting Professor, Sloan School of Management, MIT, Cambridge, MA, USA. He has been the responsible person of several National and European Projects, as for example "TAPE", Research Project supported by the European Union (DG VII), within the IV Framework Project (from January 1996 to April 1997).

Giovanni Andreatta homepage

Institut D'EStadística de CATalunya
Role IDesCat

Enric Ripoll is the Assistant Director of IDESCAT for Management and Technical Resources. He will represent IDESCAT in the project and he will lead the research team at IDESCAT. He earned a Ph. D. in Economics from the Universitat de Barcelona, and was an Associate Professor there from 1980 at the Department of Econometrics and Statistics. He serves as Executive Editor of the journal "Quaderns d'Estadística i Investigació Operativa-Qüestiió" and Guest Editor of the journal "Fuentes Estadísticas" edited by INE and Eurostat. He has been involved in the organization of international statistical conferences and has participated in the FORCE4/R, STABLE and TESS European projects on behalf of IDESCAT.

Istituto Nationale di Statistica
Role INE

Gloria Torres Borrell has a University degree in Physics. After working for 5 years as a marketing specialist in the enterprise 3M España, joined the National Statistical Institute in 1976. She has worked in the industrial Statistics (3 years), Social Statistics Department (4 years), Data Processing Department (7 years). During seven years she has been the Head of the Geographical Information System Unit, and since 1997 she is the Responsible for Statistical Confidentiality and Informatics Security. She is the representative of Spain in the Statistical Confidentiality Committee of Eurostat.

Technical University of Ilmenau
Role TUIlm

Karl Luhn studied economics at the University Leipzig. After graduation he worked in the Departement of Mathematics and Statistics at the Handelshochschule Leipzig and was involved in several projects of mathematical methods in economics, especially methods of operational research. In these fields he also works since 1977 at the Technical University Ilmenau.

Karl Luhn homepage

Consejo Superior de Investigaciones Científicas

Vicenç Torra-Reventós is a Senior Researcher at the Institut d'Investigació en Intel.ligència Artifical (IIIA), which belongs to the Spanish Consejo Superior de Investigaciones Científicas (CSIC). He was formerly an Associate Professor at URV. He will lead the research team at IIIA-CSIC. Torra-Reventós earned a Ph. D. in Computer Science from UPC. His field of expertise is artificial intelligence, and more specifically knowledge integration and fuzzy sets. He has authored over 50 papers, some of which have been published by IEEE and ACM. He has led one competitively funded project and a contract with the Bureau of the Census (USA), and has participated in the European project VIM-"A Virtual Multicomputer" (Human Capital Mobility ERBCHRXCT/93-0401). He was Program Chairman of the 1st Catalan Conference on Artificial Intelligence and Guest Editor of the Int. J. of Intelligent Systems and Int. J. of Uncertainty, Fuzziness and KBS.

Vicenç Torra-Reventós homepage

Universitat Rovira i Virgili
Role URV

Josep Domingo-Ferrer is an Associate Professor of Computer Science at the Universitat Rovira i Virgili (Tarragona, Catalonia, Spain). He will be a member of the CASC Steering Committee and lead the research team at URV. Domingo-Ferrer earned a Ph. D. in Computer Science from the Universitat Autònoma de Barcelona and holds a M.Sc. in Computer Science and a M.Sc. in Mathematics. His fields of expertise are statistical disclosure control, cryptography and data security; he has authored one patent and over 60 publications. He has advised three Ph. D. theses. He has led two competitively funded projects and is currently leading a project funded by the U.S. Bureau of the Census on comparing SDC methods for continuous microdata. He is a reviewer of project FILIGRANE (ESPRIT/4 28423) and has served as an evaluator for the 5th Framework Programme on e-commerce. He was Program Chairman of the Statistical Data Protection'98 conference sponsored by Eurostat (Lisbon, March 1998); also, he served as a Discussant at the Joint ECE/Eurostat Work Session on Statistical Confidentiality (Thessaloniki, March 1999).

Josep Domingo-Ferrer homepage
Josep Maria Mateo-Sanz is a tenure-track Associate Professor of Statistics at the Universitat Rovira i Virgili (Tarragona, Catalonia, Spain). He earned a Ph. D. in Statistics from Universitat de Barcelona in 1998. His main interests are statistical disclosure control and statistical inference. He has authored a number of publications in those fields.

Josep Maria Mateo-Sanz homepage

Universitat Politècnica de Catalunya
Role UPC

Jordi Castro is an Associate Professor of Statistics and Operations Research at the Universitat Politècnica de Catalunya (Barcelona, Catalonia, Spain) and was formerly an Associate Professor at URV. He will lead the research team at UPC. Castro earned a Ph. D. and an M.Sc. in Computer Science from UPC. His field of expertise is optimisation, on which he has authored many international publications, some of which have been published by IEEE, SIAM and Kluwer. He has participated in project SLOEGAT (ESPRIT/4 22652). He's currently leading a competitively funded project.

Jordi Castro homepage