The SDR 2.0 Cotton File: Cumulative List of Variables in the Surveys of the SDR Database is available at Harvard Dataverse. This comprehensive data dictionary, in Microsoft Excel format, facilitates the overview of 88118 variable names, values and labels available in the original (source) data files selected for harmonization purposes in the SDR Project. For more information, see the SDR 2.0 Cotton File page.

This is a call for papers for a special issue of Quality & Quantity, “Cross-national Survey Data Harmonization”

Guest Editors:
Ilona Wysmułek, Polish Academy of Sciences,
Joonghyun Kwak, The Ohio State University,
Irina Tomescu-Dubrow, Polish Academy of Sciences and The Ohio State University,

The journal Quality and Quantity: International Journal of Methodology invites contributions to a special issue devoted to ex-post harmonization of cross-national social science survey data. To broaden the scope of comparative survey research and to increase the effective use of extant survey projects, for the last few decades social scientists have been building multi-country multi-year datasets that combine respondents’ answers from survey sources that were not specifically designed to be comparable. This type of data reprocessing, referred to as ex-post cross-national survey data harmonization, involves the synthesis of survey methods and statistical techniques with substantive theories developed by the social sciences. The interest in ex-post survey data harmonization grows together with the wealth of extant publicly available data sources and impressive advances in computer science that allow scholars to test substantive theories.

For this special issue we seek substantive and methodological papers that focus on the following three main topics:

(a) methodological contributions to harmonization procedures;

(b) variability in the quality of cross-national survey data used for ex-post harmonization;

(c) substantive analyses on democracy and political trust, social inequalities, social capital, health and well-being, and intersectionality, using survey data harmonized ex-post.

The deadline for submission of a full paper is December 2, 2019.

To submit a paper, please prepare the manuscript according to the Q&Q journal rules and upload it via the online editorial manager system ( In addition, please send the basic information about your submission including the title of the paper, names and affiliations of all authors and abstract to Ilona Wysmułek ( via email.

All manuscripts received for this Special Issue will be subject to the usual procedure of double anonymous review and to the guest editors’ review. An invitation to submit a paper to this Special Issue does not imply automatic acceptance for publication. Some submissions are likely to be rejected.

The latest issue of Harmonization: Newsletter on Survey Data Harmonization in the Social Sciences is out now.

This issue features articles and news. The first is by Marco Fattore and Filomena Maggino on major conceptual challenges to the creation of society-level indicators. Next, Joonghyun Kwak and Kazimierz M. Slomczynski present a concrete example of survey data aggregation into macro-level indicators, using cross-national data on trust in public institutions for their illustration. We then feature a report on the GESIS Roundtable on ex-post harmonization and announce a forthcoming conference & workshop on data harmonization at the Polish Academy of Sciences. We present news about harmonization projects: the American Opportunity Study, HaSpaD at GESIS, and Linguistic Explorations of Societies at the University of Goteborg. We round out the issue with news of recent publications.

We’ve moved our content, including the Newsletter, to, the address you see now. The content is hosted by The Ohio State University’s College of Arts and Sciences.

We present the latest and largest issue of Harmonization: Newsletter on Survey Data Harmonization in the Social Sciences.

The Fall 2018 issue features new research. We begin with two articles on the meaning of survey items that do not refer to a specific time frame for respondents’ past political behavior: what we call, “Have Done ‘Ever’” items. In this mini-symposium, Irina Tomescu-Dubrow, Josh Dubrow, Ilona Wysmulek, and Kazimierz M. Slomczynski write about the history of, and logical limits in, the use of these items. J. Craig Jenkins and Joonghyun Kwak examine the connection between Have Done Ever items and protest event data. Next, Joonghyun Kwak explores the cross-national comparability of perceived immigrant-threat measurement. Then, Bashir Tofangsazi and Denys Lavryk reveal what it is like to hand code the documentation of over 1700 surveys. We round out the issue with news of the 2019 Comparative Survey Design and Implementation (CSDI) international workshop to be hosted by the Institute of Philosophy and Sociology, Polish Academy of Sciences, sessions at the next ESRA conference, and partnerships with The Ohio State University’s Translational Data Analytics Institute (TDAI).


The Summer 2018 issue of Harmonization: Newsletter on Survey Data Harmonization in the Social Sciences is out now.

Harmonization Newsletter v4n1 Summer 2018This issue features items on a variety of topics. Tom W. Smith writes about how cross-national research programs can improve comparativeness at the project and program levels. Claire Durand, Paul Pelletier and David Wutchiett build on a previous Harmonization item (vol. 2, no. 2) to address why institutional trust varies across world regions. Ewa Jarosz discusses the harmonization of time-use surveys. The V-Dem Team presents the latest version of their renowned democracy project. The Survey Data Recycling team reflects on their participation in the latest Comparative Survey Design and Implementation (CSDI) workshop.

The Harmonization Project team, in coordination with Cross-national Studies: Interdisciplinary Research and Training program (, has published the latest issue of Harmonization: Newsletter on Survey Data Harmonization in the Social Sciences.

You can download the newsletter here.

This issue features news and articles on a variety of topics. First is news of two grants won by members of the Harmonization Project. The US National Science Foundation awarded co-PIs Kazimierz M. Slomczynski, Irina Tomescu-Dubrow and J. Craig Jenkins 1.4 million USD for four years to further research on Survey Data Recycling. Meanwhile, Joshua K. Dubrow was awarded 764,000 PLN for three years by Poland’s National Science Centre for a project on political and economic inequality in cross-national perspective, featuring the SDR dataset.
Stand-out articles by the international survey data community speak to the diversity of harmonization research in the social sciences. Tom Emery writes about how to harmonize administrative data with survey data in the cross-national Generations and Gender Survey; Ilona Wysmułek presents the issues on the comparability of corruption perception items in major public opinion surveys, and Marta Kołczynska, Irina Tomescu-Dubrow and Kazimierz M. Slomczynski discuss issues in harmonizing education across nations and time.

The Harmonization Project team, in coordination with Cross-national Studies: Interdisciplinary Research and Training program (, has published the latest issue of Harmonization: Newsletter on Survey Data Harmonization in the Social Sciences.

You can download and view the newsletter here.

The issue covers a variety of news on big data, harmonization, and data quality. The Harmonization Project published its data on Harvard’s Dataverse, and The Ohio State University opened the Translational Data Analytics Institute focused on big data. In the articles this newsletter features, Koen Beullens and colleagues summarize their European Social Survey data quality report, Verena Ortmanns and Silke Schneider present their latest research on cross-national harmonization of educational attainment variables, Kea Tijdens discusses measurement of occupations in multi-country surveys, Irina Tomescu-Dubrow and colleagues discuss metadata on survey quality, and Anna Turner argues for more and better sociological use of Google search data.

The Survey Data Harmonization Team led by Kazimierz M. Slomczynski, Irina Tomescu-Dubrow, and Craig Jenkins received a four-year, $1.4 million award from NSF for the project, “Survey Data Recycling: New Analytic Framework, Integrated Database and Tools for Cross-National Social, Behavioral and Economic Research” (SDR) starting September 1, 2017. The award will support the development of a harmonized database derived from more than 3,000 national surveys administered over five decades to more than 3.5 million respondents from more than 150 countries. The SDR enables innovative data-intensive research on major substantive topics of social science interest and advances the fields of comparative methodology and of survey-data harmonization.

Cross-national Studies: Interdisciplinary Research and Training program ( and the Mershon Center for International Security Studies at The Ohio State University organized a two-day event, “Democracy, the State and Protest: International Perspectives on Methods for the Study of Protest,” on May 11-12, 2017, in Columbus, Ohio. The conference and workshop brought together scholars representing different approaches to the studies of protest behavior and democracy. Invited speakers presented their work on issues related to various aspects of the relationship between protest and democracy, with an emphasis on measurement and methodology. The program of the event, as well as speakers’ bios are available here.