doi: 10.1017/S1368980015002177. Published online by Cambridge University Press 29 July 2015
Since publication of the manuscript, we made a correction to Table 5:
Number of product varieties and manufacturers per food sub-category for 13,406 packaged foods available for sale in NZ supermarkets in 2013

Aligned with this correction, we updated the text under the heading ‘Product and brand variety’; which should state:
For example, 311 breakfast cereal products were available, of which 83 (26.7%) were produced by two food manufacturers, Sanitarium and Kellogg’s. Likewise, we observed 703 varieties of chocolates and sweets (6.3% of all ultra-processed food); 255 of these (36.3%) were produced by two food manufacturers, Mondelèz/Kraft and Nestlé. Mondelèz/Kraft produced these chocolates and sweets under nine different brands. 274 products were categorized as soft drinks and divided into two sub categories: sugar-free (44) and sugar sweetened (230). 95 (34.7%) soft drinks were products by two food manufacturers, Coco Cola and Pepsi Co.
