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It is predicted that the bitcoin system will enter many areas of our lives in the future. Although it has many benefits, the most criticized issue of this system is excessive energy consumption. Since an excessive amount of energy is used in this process, it is vital that the preferred energy is environmentally friendly. For example, mining bitcoin with fossil fuels is likely to release a significant amount of carbon gas into the atmosphere. This will cause serious environmental problems. Therefore, great attention should be paid to the type of energy that will be used in bitcoin mining. In this study, it was stated that it would be beneficial to prefer nuclear energy in bitcoin mining. As a result of the use of nuclear energy, no carbon gas is released into the atmosphere. This will help reduce environmental pollution to a significant extent. Another dimension of nuclear energy being preferred in bitcoin mining is that the energy produced is continuous. The main reason for this is that nuclear energy is not affected by climatic conditions and temperature differences. Thanks to the preference of nuclear energy in bitcoin mining, it will be possible to contribute to the uninterrupted progress of this process.

It is seen that emotional intelligence, which is the subject of research in many disciplines, especially psychology and social sciences, is one of the prominent concepts. Emotional intelligence has become a sought-after feature especially for today's leaders. It is possible to say that emotional intelligence is an important feature for leaders in the energy sector as well as for leaders in other fields. This study aims to determine how and to what extent emotional intelligence has an effect on leadership characteristics in today's conditions where the need for leadership is increasing. In this study, it is aimed to reveal the effects of emotional intelligence levels of managers in the energy sector on leadership. For this purpose, hypotheses have been developed, and a research has been conducted on managerial employees in an enterprise operating in the energy sector in order to test the hypotheses. In the study, the effects of emotional intelligence dimensions such as optimism, use of emotions, and evaluation of emotions on leadership were measured by analyzing the data obtained as a result of the questionnaire application. SPSS package program was used for statistical analysis of the data. According to the results of the research, it was determined that effective leadership increased as optimism/mood regulation increased. Similarly, as the evaluation of emotions increased, effective leadership increased.

Today, the demand for renewable energy investments is increasing due to the increase in the world population and the rapid depletion of resources. Renewable energy investments are seen as an area that requires more technical knowledge and experience than nonrenewable energy investments. For this reason, qualified workforce is important in this field. The aim of our study is to reveal the criteria by which renewable energy investments are effective on qualified labor supply. According to the results of our study, in which the analytic hierarchy process method was used, the criterion with the highest weight was determined as “harmonizing universities with undergraduate and graduate level education and internship opportunities.” When this criterion is taken into account, the implementation of policies toward university education in this field together with the renewable energy investments of the countries will positively affect the qualified labor supply.

Beginning from the onset of the Covid-19 pandemic, crypto assets have intensely been in the spotlight and have attracted significant investor attention. By being the first blockchain product, Bitcoin is the first crypto asset and still dominates the entire crypto market capitalization. In this study, we shed light on whether this energy-hungry crypto asset is an effective tool for portfolio volatility reduction from the perspective of the Modern Portfolio Theory. Based on a two-year period from April 2019 to April 2021, which includes the extreme impacts (crash and rally) of the pandemic on markets, we conclude that Bitcoin is not a beneficial instrument for volatility reduction if short-selling is not allowed. After removing this restriction, Bitcoin has very small negative investment weights in minimum variance portfolios. In other words, short-selling Bitcoin slightly reduces portfolio volatility.

The ability to develop and maintain an effective network is an entrepreneurial competency. There are differences in female social networks' features as well as in the way of expanding it comparing to men's. But, there is little attention to female entrepreneurs' networks. This chapter focuses on the dynamics of female entrepreneurs' networks at different stages of the business life cycle. A qualitative study was conducted on a sample of Iranian female entrepreneurs in the trade sector situated in Tehran. The results of data analysis of 10 semi-structured interviews show a considerable change in networking activity over time. Although the most important role of networking for women entrepreneurs in both early-stage and established businesses is to achieve opportunities, information, and resources. Also, the combination of female entrepreneurs' networks is most male-dominated. And the main challenge of networking in the early-stage is being female, while it becomes rather an advantage for established ones. Finally, Iranian female entrepreneurs become more aware of networking benefits over time.

The current research investigates the regional differences in benefiting from innovation toward growth ambitions in a sample of female entrepreneurs in the Middle East and North Africa (MENA) and Nordic region. A sample of 4,048 early-stage female entrepreneurs from these two regions who were participated in annual surveys of Global Entrepreneurship Monitor was selected for further analysis. The results of data analysis using hierarchical linear modeling (mixed models) revealed that innovation benefits growth ambitions of early-stage female entrepreneurs. Further, the regional differences affect the benefit of innovation in shaping growth ambitions, so that, in Nordic region, the early-stage female entrepreneurs expect more growth out of their innovation as compared with their counterparts in MENA region. These results have been discussed regarding to existing literature, and future research directions have been suggested based on the results.

This chapter considers the productivity of 77 airlines between 1980 and 2013. We do so by estimating a stochastic frontier and decomposing the total factor productivity growth into efficiency, technical and scale efficiency change. Our results show that, on average, airlines increased productivity over the period but that, while efficiency and technical change improved, scale efficiency results indicate that the average airline moved away from the most productive scale size. This was especially so in the two decades after 1980. Comparisons between geographical areas, business models, networks and alliances are also made.