To identify variables accounting for variation in diffusion of cooperative agricultural occupations curriculums, data were collected by interviews with 32 teachers who were participants in one of the agricultural occupations institute workshops conducted at Oklahoma State University during the summers of 1965 or 1966 who were still teaching vocational agriculture in the same school in 1968, and their administrators. Regression analysis was used to compute a simple correlation matrix, partial and multiple correlation coefficients, and a multiple regression equation for use in predicting diffusion of cooperative agricultural occupations curriculums into a vocational agriculture program. Variables related significantly to diffusion were: (1) number of teachers in the department, (2) number of students enrolled, (3) teacher innovativeness, and (4) the number of non-farm students enrolled. The multiple regression equation accounted for 70.1 percent of the variance of the predicted criteria. Some recommendations were: (1) Multiple teacher departments are needed for program expansion, (2) More innovative teachers should be used to conduct purposeful changes, and (3) Schools with large enrollments and large non-farm enrollments should be encouraged to add cooperative agricultural programs. An earlier publication concerning this study is available as VT 006 642. (DM)