Through factor analysis, this section considers the disadvantages of old workforce investment system and the development of theories of new economy and screening to narrate the necessaries of issuing WIA.

• 第二章运用因素分析法对涉及到美国社区学院的劳力投资法案进行了背景分析。 从旧体制的不足到新经济的发展，再到筛选理论的发展，论述了法案的必要性。