Market studies
The function to carry out competition studies (also known as market studies) and to prepare competition reports was added to the Commission’s functions from October 2018 through amendment to the Commerce Act.
Access to the Commerce Amendment Act 2018 is available at www.legislation.govt.nzopen_in_new and the legislative history is available at www.parliament.nzopen_in_new.
What is a market study?
A market study is an in-depth and independent study into the factors affecting competition for particular goods or services, to find out how well competition is working and whether it could be improved. Unlike our competition enforcement and merger investigations, market studies look at the structure, conditions and performance of the market itself rather than whether there could be a breach of the laws that we enforce or whether a merger is likely to raise competition issues.
By gathering and analysing information on a market we can identify whether there are features preventing it from working well. We can then look at the effects of features identified and consider how they can best be addressed using proportionate means.
Outcomes of our work may range from a ‘clean bill of health’ for the sector to, where we consider it appropriate, recommendations for changes to enhance market performance. Although any recommendations we make are non-binding, the Government is required to respond to our final report findings and recommendations within a reasonable period.
We have published guidelines that describe our processes and approach to market studies, including how we deal with information.
Who decides what markets to examine?
Market studies can be initiated by the Minister of Commerce and Consumer Affairs or self-initiated by the Commission. In either case the initiator must be satisfied that it is in the public interest to do so. The Commission will assess the public interest by reference to the purpose of the Commerce Act, which is to promote competition in markets for the long-term benefit of consumers in New Zealand.
What is the process for a market study?
The initiator of the market study (the Minister or the Commission) will publish terms of reference setting out the scope of the study and timeframe for completion. The Commission is also likely to issue a call for information from interested parties.
Following initiation, the Commission will commence an information-gathering phase. We will publish our draft findings in a draft report and consult on it. Any recommendations in a final report will be non-binding on Government, but may include recommended measures to improve the performance of markets, such as changes to regulation, policy or the conduct of market participants.
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Our Assessment of competition in the domestic airline sector
In February and March 2025, we undertook an assessment of New Zealand’s domestic airline market to decide whether to self-initiate a competition study into the sector.Read more -
Market study into personal banking services
On 20 June 2023, the Government asked us to carry out a 14-month long competition study into any factors that may affect competition for the supply or acquisition of personal banking services in New Zealand.Read more -
Market study into residential building supplies
In November 2021, the Government asked us to carry out a year-long study into whether competition for residential building supplies in New Zealand is working well and, if not, what could be done to improve it.Read more -
Market study into the grocery sector
In November 2020, the Government asked us to carry out a study into whether competition in the grocery sector is working well, and if not, what can be done to improve it.Read more -
Market study into retail fuel
In December 2018 we commenced a market study looking into the factors that may affect competition for the supply of retail petrol and diesel used for land transport throughout New Zealand.Read more