Cost benefit analysis (CBA) is often expected or required for government projects. On the state and local level, the technique is useful for assessing the worthiness of a specific policy proposal. The accounting and analysis of large-scale technical projects require specialized training; in this manual, we offer a nontheoretical introduction to CBA, accessible to readers without an advanced statistical or economic background. The book is designed as a how-to primer in the basics of CBA for local officials who actually evaluate proposals or merely interpret reports using CBA. A Reference List is provided for further study. There is a critical need for officials and the general public to question assumptions, biases, and omissions in proposals submitted by those advocating for certain projects. Tax revenue is limited and government debt at some point becomes unsustainable. CBA is rooted in and has little or no value apart from the economic concepts of cost and resource efficiency, but our goal here is not to stress underlying economic theory. Rather, this manual is designed to explain the correct use and interpretation of CBA, pointing out CBA’s limitations and pitfalls. Properly employed, CBA is simply a method for assessing a proposal prior to a collective-choice decision. The CBA process uncovers and measures the intensity of values that residents place on certain services. It attempts to measure net benefits to be derived from a specific proposal relative to an alternative project or the default option of doing nothing. Because standard statistical packages, spreadsheets, and graphical analyses are now generally available, CBA, as a tool, has become more accessible for small projects on a local level. Case studies, presented in the final chapters of this book, represent typical proposals confronted by local officials. Included are instructions for using computer spreadsheets to build basic cost benefit models and an Appendix on the step-by-step process for discounting future costs and benefits. Completing this book will allow a student or local government decision maker to understand and construct a simple CBA model. They will also be able to evaluate more extensive CBA models for accuracy and shortcomings.
Keywords
benefits ratio, cost benefit analysis (CBA), cost effectiveness analysis, discount rate, economic efficiency, existence values, external or social benefits, external or social costs, externalities or spillovers, government failure, hedonic valuation, hypothetical contingent valuation, local government, market failure, net discounted benefits, positive time preference, present value of benefits, present value of costs, project evaluation, regulatory capture, rent seeking, sensitivity analysis, social welfare functions, standing, willingness to accept, willingness to pay