Stats NZ has a new website.

For new releases go to

www.stats.govt.nz

As we transition to our new site, you'll still find some Stats NZ information here on this archive site.

  • Share this page to Facebook
  • Share this page to Twitter
  • Share this page to Google+
Classification and coding process

Classification criteria

The principal criterion used to classify a country is the country name or title given by the survey respondent. To group countries, the principal criterion is geographic proximity. Countries are grouped into progressively broader geographic areas based on their similarity in social, cultural, economic, and political characteristics. 

Classification

There are two types of country classifications: the four-numeric classification and the two-alpha classification.

Statistics NZ maintains the four-numeric classification according to the numeric codes and names assigned by the UN Statistical Division and the ISO.

The four-numeric classification of a country is a hierarchical classification with three levels. There are nine major groups in level 1, 27 minor groups in level 2, and 244 countries in level 3. There are no residual categories as supplementary codes are used instead.

The two-alpha classification of country is a flat classification containing 246 countries. 

The full classification for the 4 numeric and 2 alpha code is available on the main page.

Supplementary codes

Supplementary codes are used to process inadequate responses. There are two types of supplementary codes:

  • Codes beginning with zero are used to code responses which cannot be allocated to a country, minor group, or major group code (operational codes).
  • Codes ending with zero are used to code responses which cannot be coded to the detailed level of the classification but can be coded to a higher level of the classification (not further defined codes).

The full listing of supplementary codes can be found within the full classification on the main page.

Coding process

In developing the coding index, Statistics NZ followed a number of rules to assign index entries the correct classification code. These rules should be followed when coding any response which does not appear in the coding index. The coding rules are:

  • Responses relating directly to a country separately identified in the classification are coded to that country.
  • Responses relating for example, to places, towns, regions, and states, which lie wholly within the boundaries of a country separately identified in the classification, and which are part of that country, are coded to that country.
  • Responses relating for example, to places and regions which cannot be identified as lying wholly within the boundaries of a country separately identified in the classification are assigned a 'not further defined' code, or the code of a residual category, as described above.
  • Responses relating to countries which have changed names, without changing boundaries, are coded to the latest name in the classification.
  • In instances where a country no longer exists, if the geographic area the country previously occupied is wholly contained within the boundaries of an existing contemporary country, then responses are coded to the contemporary country.
  • If the area of a country no longer in existence is not wholly contained within the boundaries of one of the separately identified countries of the classification, responses relating to the country no longer in existence are assigned an appropriate 'not further defined' code. For example, a response relating to a country no longer in existence, the previous area of which is not wholly contained within a contemporary country, but is wholly contained within a minor group, is given the code of the minor group followed by '00'.
  • The first response is used where there are multiple responses to a question.

A codefile is used to code responses to the classification. A codefile is a comprehensive list of probable survey responses and the categories to which they are coded. In addition to country titles, the codefile for country has regions and provinces where appropriate.

A two-character alpha code is provided for the processing of overseas trade, international migration, and balance of payments information.

  • Share this page to Facebook
  • Share this page to Twitter
  • Share this page to Google+
Top
  • Share this page to Facebook
  • Share this page to Twitter
  • Share this page to Google+