[Excerpt] Did final-offer arbitration have a discernible impact on the salaries of police and firefighters in Massachusetts during the 3-year trial period which ended June 30, 1977? To analyze this question, we collected information on the maximum salary paid to police patrolmen, police sergeants, firefighters, and fire lieutenants for a large sample of Massachusetts municipalities. We integrated these data with police and fire impasse experiences and added several economic and environmental characteristics for each Massachusetts municipality. Then we performed several tests of the economic impact of final-offer arbitration.