Economic Evaluation Study Of Public Projects

Economy evaluation of public project concerns not only the financial rewards of investments, but also the improved results of social public welfare originated from invested projects. The conventional welfare theories offer concepts, principium and welfare standards to the evaluation means of public project social benefits expenses. In recent years, for the developments of economy theories and the adjustments of national economy development goals, it is necessary for us, according to economic characteristics of public projects, to construct and perfect economy evaluation indexes system, on the foundation of existing economy evaluation system for investment.According to the characters of economy exteriority, economy welfare, and OYO economy, public projects can be carved up "platform type" , "welfare type", and "resource type" . Using welfare economy theories as the core, and introducing real option ideology and OYO economy theory, the economy evaluation index system of public projects is built up. Meanwhile, the system may be the gist of public projects economy evaluation, combined with the present projects evaluation indexes systems and methods.The measure of real option is usually applied in the estimation of "platform type" pubic projects value increment. The logic lies in that the public project is regarded as an investing instrument and carrier of governments. The value increment behaves as the positive impact on country capital, owing to the actualization of the project. The logic deems that the overflow effect is considered as a latency investing opportunity resulting from projects; and the value derives from the execution of public projects. Accordingly, by means of measuring these real options values conduced by the project, a part of "overflow effects" what are "platform type" public project produced may be ascended as "the interior value" of projects. As they are intradebleble when public projects are regarded as assets, and based on PDE analytic resolution, the intradebleble projects are necessary to be decompounded several tradeble assets combinations stage by stage and the data of combinations act as the carrier of objects- assets real option value which is utilized to evaluate the public projects. The essay explains and analyzes the measuring means of the real option value of public project, taking G-D railroading project as an example.As to "welfare type" public projects, the dissertation discusses that the existing economy index system, imports the welfare effects, indexes of economy welfare value, and effect indexes of distribution; And the system acts as an important evaluation gist during estimating investing course. The form and quality of social welfare functions are firstly compared and analyzed; the form of social welfare function was brought forward to evaluate the welfare effect of public projects. It's one of key contents and core creative points of the chapter that the indexes measure the distribution effects. They are built of the allotting effects of areas, the distribution modulus among different beneficiaries, and colligated distributed indexes. The thesis analyses calculating methods of related indexes and the evaluation conclusions, using the Qing-Ba aid-the-poor programme as an example.Aiming at "resource type" projects, and according to the OYO economy theory, the article refers to the setup of some indexes what are used for resources, environment, energy, and social economy evaluation indexes of public projects, and uses it for reference which is evaluating indexes of persistent advancement for evaluation. It constitutes a 3-layer evaluating indexes system of cycling economics as a result. The paper also discusses the evaluating resolution of fuzzy colligation.