Despite the global nature of the information revolution, most policies for information infrastructure are developed at the national level. These national policies reflect local economic, social, historical and political circumstances and exhibit differences in vision, policy design, and implementation strategy. In general, they reflect the reality that private sector may play the leading role in developing the new infrastructure. "National Information Infrastructure Initiatives" includes a dozen case studies analyzing how national-level policy initiatives address the challenge of information technology, interactive content and new applications, as well as the "information superhighway". These contributions examine the interplay of issues in different sectors, including telecommunications, broadcasting, publishing and information technology. The national cases are supplemented with studies of regional and international initiatives that push and pull on national policies.