However, in the NPM approach, commissioners or purchasers of services in the public sector were also seen to have the potential for economies of scale or economies of scope if they worked with one or more other agencies – e.g. economies of scale from buying in bulk through purchasing consortia for the purchase of paper, furniture, etc., or economies of scope through the sharing of some expertise, e.g. specialist music teachers, consumer fraud enforcement staff, etc. Such partnerships were seen by economists as potentially efficient.