运用所学的经济学需求理论、恩格尔曲线及风险偏好理论对小灵通建设项目进行分析和评价，并通过投资效益分析评价了该项目的可行性和投资风险性。
And the essay analyzes and appraises the Xiao Ling Tong building project using the learned economic demanding theory , Engel curve and Venture Partiality Theory and the feasibility and the investing venture by investing benefit .
恩格尔曲线