“…Douglas (1958) undertook an ambitious analysis of grievance procedures, union status provisions, and fringe benefits, in addition to 4Additionally, a considerable literature before 1970 investigated the role of unions in erasing wage differentials at the occupational, interplant (including interfirm), interindustry, and geographical levels. Prominent examples are McCabe (1912), Lester and Robie (1946), Reynolds (1957), Kerr (1957), andMacDonald (1963). These studies found that unions did indeed strive for wage standardization across firms as well as within firms, and found strong evidence that many unions drove the wage structure toward greater uniformity within industries.…”