This first volume of a two-volume set of state case studies is the result of eighteen months of work by the project's researchers to understand how states and localities interpreted and operationalized the provisions of the Workforce Investment Act (WIA) of 1998. The project took a close look at the orientation, governance, structure, and services of the workforce investment systems in eight states, and two local areas in each state, to provide information for the reauthorization of WIA. Field researchers in each state conducted a series of interviews with members of state and local boards and their staff, state and local elected officials and their staff, state agency officials responsible for workforce development and welfare programs, service providers, advocates, and other interested parties. Researchers also studied sample One-Stop Career Centers in each state. The case studies for four states -- Maryland, Michigan, Missouri, and Oregon -- are included in this volume.