Look out for abnormally low bids. A lower bid can sometimes genuinely reflect a more efficient supplier, or one that is willing to invest in the relationship by taking a lower margin on the contract. Such competitive responses should be encouraged. But an abnormally low bid could impact negatively on service delivery. It could even indicate that the supplier is involved in a cartel or taking advantage of its market power in breach of section 36 of the Commerce Act 1986.
For more information, including on bid rigging, see: What is a cartel? – Commerce Commission New Zealand.