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Global Corruption Barometer Survey in the European Union

Application Closing Date - 02 Mar 2020

Job Start Date - 15 Mar, 2020

Duration - 15 March 2020 – 15 September 2020

Location - European Union



Transparency International (TI) is the global civil society organisation leading the fight against corruption. Through more than 100 chapters worldwide and an international secretariat in Berlin, Germany, TI raises awareness of the damaging effects of corruption and works with partners in government, business and civil society to develop and implement effective measures to tackle it.

The Transparency International Secretariat (TI-S) in Berlin is seeking a Service Provider who will conduct sub-nationally representative public opinion surveys in the European Union. The aim of the survey is to measure respondents’ perceptions, experiences and attitudes towards corruption. The results will be compared with similar surveys which TI-S is conducting internationally to build up a global picture of the extent of corruption.

These surveys will be part of the 10th edition of the Global Corruption Barometer series. For the first time, the Global Corruption Barometer in the European Union will be implemented using a regionally representative sampling approach, which will allow for comparison of results at the sub-national level (the nomenclature of territorial units for statistics – NUTS1 or NUTS2 levels). This will allow for anti-corruption policy recommendations to be better tailored to the sub-national context and to allow us to better highlight how citizens vies and experiences vary both between member states and within the various regions of each member state.


The Global Corruption Barometer surveys measure people’s views on corruption in their country generally, how the level of corruption has changed and in which institutions the problem of corruption is most severe, in addition to people’s experience of bribery in the past year across six different services. The survey asks people how well or badly they think their government has done at tackling corruption.

For the first time, the Global Corruption Barometer in the European Union will be implemented using a sampling approach, which will allow for comparison of results at the sub-national level (the nomenclature of territorial units for statistics – NUTS1 or NUTS2 levels, depending on the country and funds available).

Transparency International is seeking proposals from Service Providers for surveys representative at the NUTS1 or NUTS2 levels to be conducted in the European Union. The NUTS level will be defined separately for each Member State after the assessments of the costs versus funds available, by TI-S. In order to support this decision process, tenderers are required to submit quotes for NUTS1 and NUTS2 levels for each country. Each NUTS region (either at NUTS1 or NUTS2 level) must have 500 completed interviews. For countries with only 1 NUTS1 or only 1 NUTS2, a quote should be provided for a minimum of 1000 interviews.

We strongly encourage bids covering all countries listed below:

Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxemburg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden


Our methodological preference is for CATI telephone surveys with random samples. Defined NUTS level (NUTS1 or NUTS2) regions – where applicable -- shall be used as explicit quotas, with at least 500 interviews to be completed in each. Within NUTS regions, samples must be drawn at random, and controlled for basic socio-demographic parameters after the fieldwork, via post-stratification.  

Thus, the samples in countries where defined NUTS level includes several regional units, the samples will be expected to be representative at the defined NUTS level (NUTS1 or NUTS2). The Service Provider must ensure the collection of a random sample that represents the target population in each relevant NUTS region in terms of gender, age and urbanisation level (considering the DEGURBA variable of Eurostat). This representativeness is primarily foreseen to be ensured with a random sample collected with sufficient safeguards to decrease nonresponse. Should this not produce the desired level of similarity between the samples weighted for selection probability and the target population, TI-S will request the Service Provider to perform post-stratification weighting. Tenderers are invited to advise whether demographic quotas would be applied in any/each of the countries covered. 

The samples should typically include both landline and mobile telephone numbers. If the Service Provider wants to deviate from this, a rationale must be provided in the proposal. Service Providers are expected to provide a noncoverage rate (in terms of adult, 18+ population) of the sampling approach chosen. Service Providers are to describe in detail the method of sampling for CATI surveys for each country. TI-S anticipates that CATI samples are constructed by Random Digit Dialling (RDD) technology or another fully automatic randomised approach.

In addition to CATI offers, TI-S will also consider internet surveys, however, the Service Provider must provide information about the size of their panel in each of the affected countries; how participants are recruited to their panel and what methods the supplier uses to ensure a representative panel (nationally as well as on regional level), as well as the perceived advantages of an online survey compared to interviewer-facilitated telephone methods. Service Providers are expected to make offers for internet surveys in addition rather than instead of CATI surveys.

Please notify us whether the Service Provider is proposing the use of a consumer omnibus survey.

The Service Provider is expected to submit a full methodology plan upon application. This should include:

- a description of sample source or sampling method, if different, then by country; also specifying the method of blending mobile and landline telephone numbers in the sample

- a brief summary of the strategy to determine if a sampled individual is a resident of the/any target region

- a description of the interviewing infrastructure, if different, than by country. Tenderers must note that TI-S will prefer centralised solutions for CATI software as well as for sample management.

- a description of sample management protocol, if different, than by country, including the strategies to decrease nonresponse (in terms of sample management – i.e. the oversampling rate and the batches for releasing the sample defined as % of the sample --, interviewer selection and training, recalls, appointments and allocation of calls across different times of the day or the week, a standardise recording of outcomes that allow the eventual production of response rates corresponding to the standard ESOMAR/AAPOR system).

- the strategy to select the target respondent in household-based subsamples (i.e. landline samples)

- the strategy to control for selection bias due to uneven selection probabilities; selection probability weighting

- a declaration that the population statistics at the chosen regional level will be prepared and shared with TI-S for each country, in due time after signing a service contract.

Service Providers shall also submit details on the size, composition, and experience of the project team along with identification and contact details for all the national affiliates who will be responsible for conducting the fieldwork locally. Finally, an outline of the training scheme and provisional schedule for the project teams and the specific quality controls that will be used during and after fieldwork should also be attached to the proposals.

The Service Provider is responsible for programming the questionnaire. The final questionnaire, including appropriate coding elements and logic/skip patterns, must be reviewed and approved by TI-S prior to fielding. The Service Provider is responsible for procuring a quality translation of the final questionnaire, unless a translation is provided by TI-S, in which case the provided translation must be used; the Service Provider is also responsible for providing necessary translations for all trainings. In countries with a TI chapter, the Survey Provider must permit the chapter staff to witness interviewer trainings.

The Service Provider is required to monitor that project teams adhere to the sample selection procedure and other methodological requirements, and will establish quality control procedures. The proposal must include specific plans for quality control, such as the percentage of data to be back checked (at least 10 percent), , the portion of the sample to be witnessed by a supervisor and any other means of quality monitoring, such as IT-driven solutions (i.e. tracking of interviewer activity based on time, etc.). Weekly progress reports shall be submitted by the service provider to TI-S.

The Service Provider will conduct pilot interviews with 10 respondents in each country (5 respondents in urban areas and 5 respondents in rural areas – rural interviews will be conducted outside of the direct agglomeration of a city). The purpose of piloting is to ensure that the translation is correct and that the questions are appropriately phrased for the local environment and that they are understood by the respondents.

Any modifications to the survey instrument, field instructions, or methodology must be agreed and approved in advance by TI-S. Fieldwork and data processing (including weighting) is planned to be completed by Q2 2012, or the date agreed upon between TI-S and the Service Provider.


The following deliverables will be provided by the Service Provider to TI-S prior to the start of fieldwork:

April 2020

Translated Questionnaire­: Unless it is pre-existing, the Service Provider will also provide TI-S with translated version of the (newly added or modified segments of the) questionnaire which will be reviewed by TI-S prior to fieldwork commencing. TI-S will share all this information with its National Chapters in the region, wherever present.

Programmed Questionnaire: Service Provider will provide TI-S with programmed version of the approved questionnaire in a framework matching the target methodology, i.e. CATI, or CAWI if proposed by Service Provider and accepted by TI-S. The intended technology / software for the programmed instrument must be specified, along with a thorough description of the quality controls embedded in the questionnaire programming. Before launching the questionnaire script for live interviewing, a dummy dataset – with at least 100 cases per individual script – should be created to allow TI-S researchers to check the routing works as intended.

May 2020

Survey Manual: The Service Provider will provide TI-S with a copy of the survey instruction manual which will be used by supervisors and interviewers when carrying out the survey. This will detail survey instructions and codes of conduct. TI-S will provide previous manuals to provide a model for the Service Providers.

Survey Fieldwork Schedule: TI-S will be provided with a survey fieldwork schedule by the Service Provider which will give the expected dates for training, fieldwork, data editing and final data delivery in each country, and overall. These schedules will be monitored during the survey process and adjusted as necessary, in agreement with the Service Provider and TI-S research team.

The following deliverables are to be provided to TI-S by the Service Provider during fieldwork and/or after fieldwork has completed:

August 2020

Data File: TI-S will be provided with instalments of preliminary data at 10% and 50% of collection. Once data collection and quality control has been completed, TI-S will be provided with the complete final data in a suitable format (SPSS) properly labelled in English. Service Providers must be aware that TI-S may provide a mandatory data wireframe for data outputs to harmonize activities across providers and across GCB waves.

September 2020

Technical Report: The Service Provider agrees to provide TI-S with a technical report which details the application of the research methodology in-field, challenges that were encountered, details on the response rate to the survey according to the AAPOR standards, and quality control processes conducted. A sample of such Technical Report can be accessed here.

All presentations and reports are to be submitted in English, in electronic form, in accordance with the deadlines stipulated above. The Service Provider is responsible for editing and quality control of language. The TI Secretariat retains the sole rights with respect to all distribution, dissemination and publication of the deliverables.


The Service Provider and project team should have the following qualifications and credentials:


The Service Provider should provide their estimated total fee as a lump sum or as standard daily or hourly rates, before any VAT or other charges.

For Consultants based in the EU, EEA and Switzerland

Transparency International e.V. (Secretariat), (TI-S) is registered as a Business Entity in Germany with VAT identification number DE273612486. In order to determine the Value Added Tax (VAT) implications of this tender, we kindly request that Consultants fill out the VAT Form for Tenders/Vendor Form (instructions inside the form) and submit the completed and duly signed form along with their email application.

The link to the VAT Form for Tenders/Vendor Form is available below.


The application should include the following documents in English:

Please indicate “GCB European Union” in the subject line of your email application. Applications should be sent in English by email to Roberto Kukutschka at GCBEU@transparency.org  by close of business of 02/03/2020.

Please note that only shortlisted applicants will be contacted.


The international fight against corruption needs your expertise, your skills and experience, and your passion for social justice. 

From our secretariat in Berlin and in more than 100 national chapters, Transparency International seeks professionals and volunteers with exceptional talent and commitment to join our efforts and make a contribution to a better world.


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