Every public project has to be evaluated and substantiated before the investment decision is made. Public projects are specific investment, directed to a society needs satisfaction. The time aspect is crucial in valuation of public projects because even if we know the future costs and benefits, the decision has to be made today. Future costs and benefits have to be discounted, and for this a correct SDR must be chosen. Guide of Cost-Benefit analysis recommends 3.5-5.5% SDR. Recommended by researchers SDR for public projects varies from 0 to 7%. Choose of SDR rises more problems than give the answers. Recently the researchers develop new approaches towards SDR estimation and choose for public projects’ valuation. Traditional approach towards constant SDR is changed by the new approaches: changing over time or different SDR applicable for costs and benefits. The research results show the huge impact (sensitivity) of economic NPV of rural society’s public project to SDR. Discounting costs and benefits of the public project at 3.5-4 % SDR, the public project is efficient, discounting at 5-5.5 % SDR – becomes non-efficient. Inappropriately chosen SDR leads to the wrong investment decision.

The European Innovation Partnership in Agriculture (EIP-AGRI) was initiated by the European Commission for social benefits and the modernization of the overall economy through innovation. Better and faster results are expectingby fostering collaboration between scientists, agricultural advisors and farmers. The main problem is how to evaluate the effectiveness of innovation partnership projects in agriculture, with what indicators to define and measure it? To address this problem, a methodology for evaluating the effectiveness of innovation partnerships in agriculture hasneeded. This article presents the methodology of evaluation of the effectiveness of innovation partnership in agriculture, which details the selected evaluation indicators, determines their significance, and provides guidelines for the interpretation of the results of efficiency evaluation. The developed evaluation methodology has tested using the project data of EIP groups operating in Lithuania. The methodology for evaluating the effectiveness of innovation partnerships in agriculture is relevant fromboth a scientific and practical point of view.

The social (public) water management projects implement the goals of national sustainable development - improve the living and working conditions for people in rural areas, protect the environment. The mentioned projects don’t generate net income, but create social benefit for the public. The social benefit associated with the expected impact of the project. The social benefit not measured in monetary units, but in various quantitative and qualitative metrics. The research problem follows from the diversity of social benefit indicators and the need of complex assessment of these indicators. Multicriteria evaluation methods allow complex assessment of social benefit indicators, social benefit of social (public) projects can be evaluated and the project alternatives can be ranked and compared. The article analyzed and assessed possibilities and weaknesses of the multicriteria methods for social (public) project social benefit evaluation, the methodic for multicriterial evaluation of social benefit of water management project is consisted and the complex assessment of social benefit of water management project alternatives are carried out.

Every investor seeks to identify the expected financial results of investments and economic, social, environmental impact of investment project. Every investor seeks to know economic efficiency of investment project before investment starts. For these reasons, each investment project should be evaluated in order to choose the most efficient investment option. The main goals of public, private and public - private partnership investment projects are different and these differences must be reflected in projects evaluation process. Private investment seeks net revenue, profit or company value. Public investment projects are directed in creating social benefits for society, environmental sustainability and economic cost savings. Public – private partnership projects goals are combined. The main goal of this scientific research is to reveal the differences and peculiarities of public, private and public – private partnership investment projects that influence these projects evaluation, to conclude the projects evaluation methodology using multi-criteria evaluation methods and try the created methodology empirically evaluating investment project of the forestry sector, when there are different sources of financing. The created multi – criteria evaluation methodology allowed us to select the indicators, evaluate them according different expectations of investors, combine the indicators and calculate the benefit – cost ratio. The investment evaluation results let us rank the investment options, which could be financed by different sources (private, public or mixed).