The Social Security Administration is funding a random assignment evaluation of six demonstration projects to improve employment and other outcomes for youth ages 14 to 25 who are either receiving disability benefits or are at high risk of receiving them in the future. This report reviews the Youth Transition Demonstration (YTD) projects, located in Buffalo, New York, including findings from a process analysis on implementation, as well as an analysis of one-year impacts on youth's use of services, employment and earnings, income and benefits, educational attainment, and attitudes and expectations. Appended are: (1) Additional Analyses and Technical Discussion; (2) Supporting Tables for Chapter III; and (3) The SSA Waivers for YTD. (Contains 60 tables, 10 figures, and 124 footnotes.) [This report was submitted to the Social Security Administration's Office of Program Development and Research.]