This document provides an overview of labor market trends in the United States. It discusses key concepts like the labor force, employed and unemployed individuals, and trends over time. The economy has shifted from agricultural to industrial to service-based. There have also been significant increases in women participating in the workforce and those with college degrees earning higher wages. Union membership has declined as manufacturing jobs decreased and service jobs increased. Collective bargaining is used to negotiate contracts between unions and companies covering wages, benefits, and working conditions. Strikes may occur if no agreement is reached, with mediation and arbitration used to settle disputes.