REDS 2021 Restricted Use Data

The REDS 2021 Restricted Use Data will only be made available upon special request by researchers. It contains all data freely available in the REDS 2021 Public Use Data, plus the additional variables listed below.

Researchers who want to use the additional data below need to formally apply and provide reasoning why they would need the additional data. They need to agree not to disclose any individuals.

Application procedure

If you are interested in working with the Restricted Use Data, you will need to apply using the IEA Restricted Use Data Application Form. In addition, you need to sign the Restricted Use Agreement. Please download, complete, and sign both the application form and the agreement and send it to

The application will be reviewed by IEA staff, who will decide upon access to the data. Applicants will get feedback within 3-4 weeks. In case access is granted to the applicant, the IEA will provide details on how to access the restricted-use data.

If you are residing in one of the following countries Andorra, Argentina, Austria, Belgium, Bulgaria, Canada (commercial organization), Croatia, Czech Republic, Denmark, Estonia, Faroe Islands, Finland, France, Germany, Greece, Guernsey, Hungary, Iceland, Ireland, Isle of Man, Israel, Italy, Japan, Jersey, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Republic of Cyprus, Republic of Korea, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom, or Uruguay, please click here to download the Restricted Use Agreement.  

If you are residing in a country not mentioned in the above list, please click here to download the Restricted Use Agreement

Additional variables available in Restricted Use Data

These are the additional variables available in the Restricted Use Data:

Sampling/Tracking/Identification Variable

Variable name Description


Teachers' year of birth from tracking forms
BIRTHY, BIRTHM Students' year/month of birth from tracking forms

Student Questionnaire

Question Nr Variable name Description
31A/B IS2G01A/B Students' date of birth