The impact of collective bargaining in selected areas of institutional decision making at Illinois community colleges was studied. The study institutions were public community colleges that had comprehensive academic programs and were campus-based. Questionnaire responses were received from 645 teaching faculty. Findings include the following: the areas in which faculty had the greatest impact on decision making dealt with the curriculum, degree requirements, grading system, and program admission requirements; while the areas where faculty perceived the least impact on institutional decision making included negotiating individual faculty salaries, dismissing faculty with cause, and selecting the top campus administrators. Comparisons were made of faculty views at unionized and nonunionized campuses, along with demographic and background characteristics of faculty at unionized/nonunionized institutions. It was found that in 19 of 20 areas, faculty at unionized colleges viewed that they had greater impact in institutional decision making than did faculty working at nonunionized colleges. In addition, faculty in unionized and in nonunionized colleges demonstrated similar demographic and background characteristics. Appendices include a bibliography and study data. (SW)