As the new millennium begins, the debate about how best to provide, produce, and deliver public works and infrastructure services to a growing population increases in intensity. The authors argue that traditional definitions of “privatization” and “public-private partnerships” limit thinking about the options available to infrastructure policy makers and that a broader definition of potential arrangements that better captures the nature of the relationships between the public, private, and nonprofit sectors will lead to a more productive conversation about how best to meet infrastructure needs. This article thus sets the stage for the other four articles in this symposium and enjoins a debate about alternative service delivery arrangements in the 21st century.