From the perspective of knowledge markets, Mcgee and Prusak (1993) note that people barter for information, use it as an instrument of power, or trade it for information of greater value. Davenport and Prusak (1998) used a knowledge marketplace analogy to describe the exchange of knowledge among individuals and groups. However, Shapiro and Varian (1999) indicate that information markets will not resemble textbook competitive markets with many suppliers offering similar products but lacking the ability to influence prices. Simard (2006) described knowledge markets as a group of related circular knowledge-service value chains that function collectively as a sector, to embed, advance, and extract value to yield sector outcomes and individual benefits.