Final answer:
Without access to Thomas A. Kochan's 1980 work about bargaining units, a critical examination of the four types of bargaining units is not possible. However, bargaining units generally fall into categories such as functional, craft, industrial, and general units, with examples including the American Federation of Teachers and United Auto Workers.
Step-by-step explanation:
The question pertains to Thomas A. Kochan's work from 1980 that identifies four types of bargaining units within the structure of labor negotiations. The term ‘bargaining structure’ encompasses ‘bargaining units’ and ‘bargaining levels’. These units are critical in defining the scope and nature of collective bargaining in various contexts. Unfortunately, the specific four types of bargaining units are not provided in the question or the provided reference materials. Therefore, without further information or access to Kochan's work from 1980, we are unable to critically examine these four types of bargaining units.
Generally, bargaining units can be categorized based on different criteria such as functional categories, which include all employees in a specific role or department; craft units, consisting of workers with a particular skill; industrial units, which cover all workers in a specific industry regardless of their individual occupations; and general units that include a mix of employee types in a broader bargaining context. In practice, examples of how these units work can be seen in unions like the American Federation of Teachers, which would represent a functional type of bargaining unit as it organizes all professionals within the teaching profession, or the United Auto Workers, which is more akin to an industrial unit since it represents workers across the automobile industry.