Abstract:The joint action of the European directives and the national strategies make the issue of energy efficiency of the dwelling stock one of the main research directions in the field. The purpose of this study is to create and apply a methodology for developing the portfolio of projects to increase the energy efficiency of the dwelling stock at a regional level through the use of life cycle cost. For this, eight types of energy efficiency improvement projects and three implementation scenarios were selected for the dwelling stock. For each project life cycle cost was determined in each county of the South-Muntenia region based on the estimation of the energy requirements, the costs of implementation and exploitation. In all three scenarios, the P3 Energy Efficiency Project (the reference building without shutters under the Romanian normative) had minimal life cycle cost in most counties in the region. For each scenario the life cycle cost was determined for the optimal portfolio of projects at regional level. The maximum scenario was chosen as the optimal scenario for regional implementation.

The paper aims to discover if the particular macroeconomic factors are influencing the capacity of small businesses in Romania to generate more added value in the national economy. In order to analyze the impact of the selected phenomenon on the performance of the businesses as expressed by the ratio of the added value, a regression analysis, a correlation test and a co-integration test were performed. The novelty of the paper is represented by the focus on the small firms, elements often included in the bigger category of SMEs. The results are showing that only two of the six factors selected could be test for correlation and co integration, the annual inflation and the average exchange rate between the national currency and the EURO.

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