Final answer:
Police services are more likely to have a large union membership without import competition due to their governmental nature and lack of exposure to globalization, unlike other service sectors like lawyers.
Step-by-step explanation:
Among the sectors, police services are more likely to have a large union membership and also experience little import competition. This can be attributed to the fact that police services are inherently local and governmental in nature. As several of the biggest unions in the United States are composed of government employees, such as the American Federation of State, County and Municipal Employees (AFSCME), unions have had greater success in organizing in the government sector as opposed to the service sector, which includes professions like lawyers. Furthermore, police services are not subject to globalization pressures in the same way that other sectors might be because they are driven by domestic needs and policies, leading to virtually no import competition.
The decline in unionization rates in the U.S. has been more pronounced in other sectors due to several factors. These factors include the shift from manufacturing to service industries, increased globalization competition, the enactment of workplace protection laws, and a legal environment that has become less conducive to the expansion of unions in the service sector. The labor market environment for lawyers and others in professional services tends to have lower unionization rates as well. While occupations in the financial services, professional and business services, and wholesale and retail trade exhibit relatively low percentages of unionized workers, unionization has traditionally been stronger in sectors less prone to international competition and where employees can bargain collectively on a large scale, such as in police services.