Using National Employer Survey data collected during 1997 and 1998, this paper examines the one-year impact on employers of participating in school-to-work partnerships under the 1994 School-to-Work Opportunities Act. In both years the surveys asked about the kinds and numbers of school-to-work activities in which employers engaged, their participation patterns over time, actual provision of work-based learning slots for student, and the impact of partnerships on employers in terms of remedial education, recruitment costs, and youth turnover rates. Respondents were asked the same questions in 1998 as in 1997, which provided an opportunity to examine persistence, dropouts, and expansion. The study found that, overall, 30 percent of employers who had participated in school-to-work partnerships in 1997 had disengaged by 1998. Employers with the highest participation levels were most likely to increase the extent to which they offered workers remedial training, and those who participated consistently were most likely to provide work-based learning opportunities. Participation was attractive to employers concerned with the skill levels of their youth labor forces. Employers' affiliation with school-to-work partnerships related to decreased firing rates and quit rates for young employees. The National Employer Survey School-to-Work Follow-up Supplement Questionnaire is appended. (Contains 24 references.) (SM)