The objective of economic success is not only to achieve positive developments in economic indicators, but to ensure a high living standard and quality of life for the population. It is therefore necessary to measure economic success in terms of social and socio-economic indicators, which indicate the quality of life of the population. A relevant indicator of economic development and economic performance is the gross domestic product (GDP) per capita. Although this indicator is the most widely used, it has recently been subject to a wave of criticism. Therefore it is necessary to evaluate the economic success, taking into account other variables, which in themselves imply social indicators: net economic welfare, Human Development Index (HDI), Index of Competitiveness, Index of Economic Freedom (IEF), Prosperity Index, Corruption Perception Index and others. The subject of this article is to evaluate the economic performance of the Visegrad Group countries using GDP per capita and selected socio-economic indicators. We use the method of time series analysis to examine the development of selected indicators. To compare their development we use the method of comparison, and to formulate the findings we use the method of synthesis. In order to evaluate the performance of the Visegrad countries we use scoring method.

Research background: Internationalisation of entrepreneurial activities provides an ample opportunity for the growth and sustainability of small and medium-sized enterprises (SMEs). When making their business activities international, SMEs are facing various obstacles. Investigating the key factors of internationalisation and their impact on SME decision making constitutes a key factor of the research work. Purpose of the article: The main purpose of the paper is to examine the impact of selected factors of SME internationalisation on the positive perception of the market risk. Higher export costs, differences in legal environment, taxes, and linguistic and cultural differences were set to be the significant factors influencing the positive perception of the market risk. Bearing the main purpose in mind, the Visegrad Four (V4 ? Czech Republic, Slovakia, Poland, Hungary) were examined. Methods: The questionnaire in mother tongue of each country in online and paper form was used. The questionnaire consists of 77 questions divided into several sections. Likert five-point scale was used to allow the respondents to express their opinion. In total, 1585 responses were completed. A regression analysis was used to verify the statistical significance of the independent variables and to quantify the causal relationships (determining the direction and strength of the effect) on the dependent variable. As the variables are of one metric, a linear regression model (LRM) was selected to validate the hypothesis. Findings & value added: The internationalisation of SME activities brings along many risks and barriers that SMEs need to overcome if they want to enter international markets. Many SMEs consider the barriers and restrictions to enter foreign markets to be severe. Therefore, they decide to do their business domestically. It was established in the research that only 30.2% of the respondents expanded their business activities internationally. The biggest impact on the positive assessment of the market risk was found to have linguistic and cultural differences. They do not have a negative effect on the positive perception of the market risk, so they do not hinder SMEs in their international expansion. The second most important was the factor of the export costs. The factor of possible increased costs is quite important for SMEs in making their decisions whether to expand internationally or not. This factor also shapes a positive approach to assessing the market risk by SMEs. In the research, SMEs confirmed that potential higher costs do not represent a major barrier for them in shaping their attitudes towards the market risk. The remaining factors being analysed, namely differences in legal environment and taxes, did not have a significant impact on the positive assessment of the market risk internationally. The practical implications can be found in new information about market risk in process of internationalisation provided from four selected countries.

Climate change and awareness of the need to care for the environment have resulted in a global increase in the interest in renewable energy sources. The European Union (EU) is active in this respect and requires Member States to fulfill specific plans in the transformation of their energy systems. We employed hierarchical cluster analysis in an attempt to distinguish those countries among the new EU Member States that increased their electrical capacity from renewable energy sources to the greatest extent while paying attention to their energy intensity. The analyses were conducted in two scenarios for both 2004 and 2016. The first scenario assumed an analysis of all known renewable energy sources, whereas in the second scenario, only renewable energy sources from wind and solar power plants were included. The division of analyses into these two variants showed the importance of the differences in the energy assessment of individual countries, depending on classification of renewable energy sources. We identified groups of countries where electrical capacity from renewable energy sources increased the most. Conducting analyses using two variants allowed distinguishing countries that based most of their renewable energy on modern renewable energy sources, such as solar and wind power plants. The inclusion of gross domestic product in the analyses allowed us to identify countries with the worst energy efficiency value.

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Digital transformation is now one of the most important topics in all EU countries in creating and managing strategies and visions for states, businesses, organizations, and citizens. The ICT sector is currently one of the most important sectors with significant added value. The main purpose of the paper is to identify the efficiency of the digitalization of the economy and society concerning the performance of the ICT sector. This paper uses multi-criteria efficiency evaluation methods – Data Envelopment Analysis (DEA models). Inputs in the basic DEA model are the dimensions’ values of the Digital Economy and Society Index (DESI), which are also used to express the DESI summary indicator, such as human capital, connectivity, digital technology integration, and digital public services. Output in the DEA model indicates the ICT share of GDP. Finally, output-oriented DEA models are used to express the efficiency score. The analysis results show that Bulgaria, Romania, Greece, and Malta have a below-average level of DESI, but they can be classified as efficient. Italy, Lithuania, and Slovenia are the worst performers in the efficiency score. The next step was to express the efficiency scores in the DEA models in terms of different combinations of inputs and outputs. Malta was efficient in all fifteen DEA models. Based on these findings, Malta is considered significantly positive. Its approaches can serve as an example for other countries. AcknowledgmentThis paper was supported by the Slovak Ministry of Education’s Scientific Grant Agency VEGA: “Digital Economy and Changes in the Education System as a Reflection on Labor Market Requirements”. Project registration number: [Reg. No.: 1/0689/20].