This report presents representative findings from the Youth Employment and Demonstration Project Act's (YEDPA) experiments and evaluations since 1977, focusing largely on the programs' impacts on participants. The report begins with a review of YEDPA-sponsored research on the nature, causes, and consequences of youth unemployment. Chapter 2 deals directly with CETA's formula-funded titles and asks whether the CETA system overall has worked for disadvantaged youngsters. Chapter 3 examines Federal efforts to help youth through intensive skill-training, and Chapters 4 and 5 cover work experience for out-of-school youth and in-school youth, respectively. Chapter 6 deals with efforts to help youth in the summer; Chapter 7 reviews efforts to assist disadvantaged youth through counseling with intensive placement, self-directed job search assistance, and school-to-work transition programs; and Chapter 8 synthesizes the evidence on work attitudes and knowledge areas. Chapter 9 considers the demand-side of the labor market by reviewing job creation strategies for youth. Finally, Chapter 10 reviews efforts to help poor youth through new institutional arrangements with the private sector, schools, and community groups. (Author/CMG)