The document discusses the benefit-cost ratio method for evaluating public projects. It provides definitions for different types of public projects like self-liquidating and multiple-purpose projects. It then outlines the difficulties in evaluating public projects and introduces the benefit-cost ratio method. The key steps to calculate the conventional and modified benefit-cost ratio are presented. The document also discusses how to use the benefit-cost ratio method to evaluate mutually exclusive projects and provides an example of incremental benefit-cost analysis for projects with unequal lives.