What a thoughtful and concise question.
The report you are seeking is the 293 page, "MEASURING THE QUALITY OF
GOVERNMENT AND SUBNATIONAL VARIATION".
The report was produced by the research team at the Quality of Government Institute, Department of Political Science, University of Gothenburg Sweden for the European Commission, Directorate-General Regional Policy, Directorate Policy Development.
It is very comprehensive and outlines the complete research methodology for the measurement of corruption within a democratic nation-state. This particular report is used internally against all 27 EU countries and 172 NUTS 1 and NUTS 2 regions within 18 countries which are highly robust to a wide array of sensitivity tests.
For the second part of your question you can refer to the U4 Anti-Corruption Resource Centre who have lots of publications including Anti-corruption Measures as Political Criteria for EU Accession: Lessons from the Bulgarian Experience They also publish the International Drivers of Corruption
The report rests of measuring four basic pillars
- QoG Concept 1: Rule of Law
- QoG Concept 2: Corruption
- QoG Concept 3: Quality of the Bureaucracy
- QoG Concept 4: Democracy & Strength of Electoral
In the report they analyse Single Source vs.Composite Source Indicators and also Expert vs. Random/ Representative Surveys. The primary quantitative dataset is taken from the World Bank. In addition, the report uses 10 in-depth qualitative case studies as well as data analysis.
Data analysis is as follows;
- Description of the Survey Data: Individual Level
- The Survey Questions
- Respondent Demographics
- Multivariate Analysis
- Correlation Matrix
- Factor Analysis
The data quality is measured through in depth analysis;
- Normalization of the Data
- Aggregation of the data & weights
- The Aggregated Data: QoG at the Regional Level
- Within Country Variation
- Margins of Error
- Internal Consistency Checks of the Data
- Sensitivity and Uncertainty Tests
- Combining the National and regional Level Data
- External Consistency Tests of the Data
- Bivariate relationships with QoG correlates
Why study democratic Government corruption?
There are numerous accounts showing how quality of government
decreases – and corruption increases – after moves towards democracy
(Lemarchand 1972, Scott 1972, Wade 1985, Sayari 1977, Varese 1997
According to the contemporary data, most indicators point out that
QoG, or ‘good governance’ is generally higher on average within the
EU-27 member states as com pared with other world regions, yet there
is significant variation among the countries in the EU. While this is
generally accepted by many, the measurements of such concepts as
bureaucratic quality or corruption are difficult to capture to say the
This report should be an excellent launchpad into the measurement of Quality of Government (IE free of corruption) within EU member states.
However the methodology and the research are cited frequently in publications.
Other Resources of Note