Abstract: From the resource-based theory of the firm, the paper extends the resource-based theory of the firm. The firm's information resources have been a kind of strategy resources, and these resources have some characteristics: valuable, rare, imperfectly imitable and substitutable. According to the resource-based theory of the firm, strategic resources are a source of firm performance differences, so the firm performance can be improved by optimizing allocation of information resources.

Key words: Resource-based theory of the firm, Information resources, Strategy characteristics, Firm performance