According to Michael Porter, operational efficiency (OE) as measured for example by financial management tools is necessary but not sufficient for firms to sustain viable superior returns. Firms that compete on OE can quickly imitate new technologies and management techniques of rivals, and feasibly reorient themselves when competition shifts the productivity frontier outwards. As Porter notes: "Although such competition produces absolute improvement in OE, it leads to relative improvement for no one." (Porter 1996, HBR, p.63) The dominant idea emerging from Porter's competitive forces approach developed in the 1980's is that superior returns are achieved when a company positions itself within its environment in way that creates a quasi-monopoly. By "environment" we refer to the industry in which the firm chooses to compete and by "position" we mean how the firm decides to compete in this industry. This framework provides a systematic way of thinking about how competitive forces
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