A field study of top management teams and knowledge workers from 72 technology firms demonstrated that the rate of new product and service introduction was a function of organization members' ability to combine and exchange knowledge. We tested the following as bases of that ability: the existing knowledge of employees (their education levels and functional heterogeneity), knowledge from member ego networks (number of direct contacts and strength of ties), and organizational climates for risk taking and teamwork.

In this article, we begin to explore the black box between human resources (HR) practices and firm performance. Specifically, we examine the relationships between a set of network-building HR practices, aspects of the external and internal social networks of top management teams, and firm performance. Results from a field study with 73 high-technology firms showed that the relationships between the HR practices and firm performance (sales growth and stock growth) were mediated through their top managers' social networks.

In this article, we begin to explore the black box between human resources (HR) practices and firm performance. Specifically, we examine the relationships between a set of network-building HR practices, aspects of the external and internal social networks of top management teams, and firm performance. Results from a field study with 73 high-technology firms showed that the relationships between the HR practices and firm performance (sales growth and stock growth) were mediated through their top managers' social networks.