IDI (Integrated Data Infrastructure)

This page describes the IDI (Integrated Data Infrastructure) data collection.

Tertiary Education

Please consider the environment before printing the contents of this report.

For links to tertiary education publications and statistics produced by the Ministry of Education refer to the 'Related Pages' insert box (right).  For further data and statistical information please refer to the "Where to Find Out More' inset (right).


The IDI is a linked longitudinal dataset that combines unit-record administrative information from a range of agencies and organisations. The IDI is maintained by Statistics New Zealand under strict privacy and confidentiality protocols. All records within the IDI are anonymised and any statistical outputs that use IDI data go through a confidentialisation process to ensure that the privacy of individuals is protected.


All results that use IDI data are subject to the following disclaimer:

"The results in this report/these tables are not official statistics, they have been created for research purposes from the Integrated Data Infrastructure (IDI), managed by Statistics New Zealand.  The opinions, findings, recommendations, and conclusions expressed in this report/these tables are those of the author(s), not Statistics NZ or the Ministry of Education.

Access to the anonymised data used in this study was provided by Statistics NZ in accordance with security and confidentiality provisions of the Statistics Act 1975. Only people authorised by the Statistics Act 1975 are allowed to see data about a particular person, household, business, or organisation, and the results in these tables have been confidentialised to protect these groups from identification.

Careful consideration has been given to the privacy, security, and confidentiality issues associated with using administrative and survey data in the IDI. Further detail can be found in the Privacy impact assessment for the Integrated Data Infrastructure available from the Statistics NZ website

The results are based in part on tax data supplied by Inland Revenue to Statistics NZ under the Tax Administration Act 1994. This tax data must be used only for statistical purposes, and no individual information may be published or disclosed in any other form, or provided to Inland Revenue for administrative or regulatory purposes.

Any person who has had access to the unit record data has certified that they have been shown, have read, and have understood section 81 of the Tax Administration Act 1994, which relates to secrecy. Any discussion of data limitations or weaknesses is in the context of using the IDI for statistical purposes, and is not related to the data's ability to support Inland Revenue's core operational requirements."

Related Pages

Where to find out more

Contact Us

For tertiary education data enquiries, please email the:  Tertiary Mailbox