Kremer-Matyškevič, Inna

This article aims to review economic advantages of the one of the most modern cutting edge technologies, namely blockchain for eProcurement. As eProcurement (including its part – Supply chain) is a concept consisting of plenty of different processes, therefore specific advantages per such major different processes are explained. Assumptions and pre-conditions of Blockchain application are explained. Article‘s main conclusion is that due to the main characteristics of Blockchain technology (safety, transparency, reliability, speed and cost efficiency) payment settlement and products‘ shipping tracking/inventory management are eProcurement‘s phases that could benefit from this technology the most, among others (such as analysis – requirements‘ gathering, sourcing/vendors‘ selection and contract management cycle).

The article object is to is a relatively new research direction in economic theory - economic security at the macro-level. One of the aims of this article is to reveal the country’s economic security idea and to choose methods for this economic phenomenon evaluation as well as to suggest the method to evaluate the energy sector's impact on this economic phenomenon. Firstly, the authors review different approaches to economic security principles and do some assumptions related to the country's economic security concept. There is shortly described the energy sector. Since the scientific problem is how to evaluate the energy sector and the country's security and what impact the energy sector has on the country's economic security, the authors have selected methods to analyze the links between energy sector activities and economic security. Furthermore, there were presented the results of regression analyzes and concluded what energy sector indicators influence countries' economic security.

This article aims to review main features and considerations of the one of the most modern cutting edge technologies‘ implementation, namely blockchain in e-procurement. First of all article describes technological background of Blockchain technology nature. Secondly assumptions and pre-conditions of Blockchain application are explained. Thirdly main process and project management methodologies of Blockchain implementation are delivered and separate steps revised. Last but not least as e-procurement (including its part – Supply chain) is a concept consisting of plenty of different processes, therefore for better technology understanding specific advantages per such major different processes are also explained.

The link between economic and national security is undeniable. Since the countries‘economic security perception is not yet unambiguous, the problem of this research arethe theoretical principles of economic security. The research object is country's economic security concept. In order to achieve scientific research‘s goalto prepare the concept of economic security of the country, the following tasks are adressed: 1) to analyze theoretical assumptions of economic security, 2) to summarize the phenomenon of economic security; 3) to define its concept and reveal the country's economic security concept. The research analyzes the views of Lithuanian and foreign scientists on economic security and summarizes these opinions in the proposed concept of country economic security. The article is divided into three parts. The first part presents the scientific literature review of economic security, the second part describes the proposed concept of country's economic security, research conclusions are presented in the third part of the article.

The relationship between the Econ omic growth and Energy Sector performance is unquestionable. Honewer it is not an easy task to evaluate the strength of this relationship. The majority of scientists are investigating the impact of certain Energy Sector’s activities on the overall energy consumption, climate change or Economic growth. This article analyzes the in fluence of Energy Sector to GDP of Lithuania. The objective of the research is to show how the re- sults of Lithuanian Energy Se ctor in 2005 – 2015 have been changed and to determine their impact on GDP. The concept of Energy Sector is presented first. Secondly, a methodology for analyz- ing the performance of the Economic growth and Energy Sector is described. Thirdly, the analysis of the activities of Energy Sector and its influence on GDP has been anal yzed. The proposed model of the impact of the Energy Sector's activi ties on the growth of GDP in the article combines six main aspects of the research: participants in the Energy Sector; Energy balanc e indicators; Changes in energy product prices; The value added cr eated by the Energy Sector; The main taxes paid by Energy Sector as part of the National budget revenue; The net profitability of the Energy Sector. This model is applicable for analyzing the aggregate performance indicators of Energy Sector and its impact on the growth of GDP. Hypothesis of this research - Lithuanian energy sector has a statistically significant influence on GDP. The findings showed that GDP and Energy Sector indicators, after a year of crisis, tended to grow. But the impact of these indicators on GDP is weak. However, particularly high correla- tion ratios between them may indirectly affect the change in GDP.