The study reviews the knowledge management challenges faced by innovative start-ups founders and entrepreneurs. Knowledge management is critical for innovation, since both organisations and individuals face very specific needs: collection of a wide variety of information and data, such as market data and technical information, and a wide range of transformation of these data into applicable knowledge, in the forms of required product specifications, business model, and business strategy. In addition, the business financing and investment ecosystem (especially Banks & Venture Capitals) uses a traditional “business plan” approach for evaluating innovation companies. Furthermore, a wide range of tools (databases, online information, Collaboration Systems, Business Intelligence Systems, ERP & CRM Systems) enable information flow and supports decision making process. To this respect, both academic literature and business experience highlight the need to improve Knowledge Management process both for individuals and organisations engaged in Innovation management. The proposed framework provides academics, entrepreneurs and venture capital companies a new approach for identifying critical success factors knowledge management and further improves decision making in a changing and challenging business environment. Finally the study highlights key areas for further research.

Ontologies are used to describe and share information, by describing a concept and defining related entities and their relations, attributes, and properties. More specifically they can be used to describe and share knowledge, using a language that computers can understand and share, and; therefore, form the pillar of the Semantic Web. The study examines the concept of business opportunity ontology from an entrepreneurial point of view. The study also examines the methodologies and best practices used in ontology development, and the use of the Protégé tool for the actual development of Ontology. Several standards were set in order for Ontology to be further used in future entrepreneurial research. These standards include a) the concept of business opportunity was developed based upon related academic theory (using the entrepreneurship, management, and business administration domains), b) as a consequence, only entities, relations, and properties that had been included in the academic literature were included in the ontology, c) the methodology had to be clearly defined since there was not a single methodological approach for ontology development, and d) the appropriate tool was selected. Keywords: business opportunity, ontology, entrepreneurship

The Food Retail sector in Greece is currently facing a number of challenges. From an economic point of view, the austerity programs imposed in Greece since 2010 resulted in losses of retail sales, alongside with bankruptcies and mergers of retail chains. At the same time, technological development creates an environment for innovation in terms of operations and marketing and offers new opportunities to retailers. Additionally, consumers become more involved and active in the purchasing processes. However, Greek consumers are also experiencing a dramatic decline in their disposable income. The study examines the perception of Greek consumers of several marketing efforts based on Information & Communication Technology Systems (ICT) introduced by a Greek food retailer in Northern Greece. More specifically, it investigates the relationship between ICT related marketing efforts, such as loyalty programs, and analytics regarding food control systems and purchases and consumer characteristics such as gender, age, income, status and family size. The study reveals a number of relationships between marketing efforts and consumer characteristics/segments. However, since the relationships are found to be weak, marketing managers are advised to use advanced analytics systems, such as big data technologies, in order to enhance the efficiency of their marketing strategies and approaches. The weak relationships between the parameters examined indicate that marketing efforts have to focus in several consumer sub segments in order to achieve significant results. The study’s sample population is consumers of one of the top food retailers in Greece. The findings contribute to the literature on the use of ICT on marketing strategies and the use of big data. Furthermore, they have practical implications for marketers in the retail food sector, as they reveal the need for a more focused approach to different consumer groups, in order to increase the efficiency of marketing efforts and to achieve maximum results.     Keywords: knowledge management, loyalty programs, ICT, segmentation

The study examines the IT Greek start-up ecosystem, analyzing the founders' views, strategy, and current perception regarding their ICT start-ups. The study examines the views and perceptions of 143 founders of Greek IT start ups who participated in exhibitions as start-up companies between September 2018 and May 2019, and had completed at least one accelerator program.

This study used Graph Theory to examine relationships within the Greek ICT start-up ecosystem, analyzing founders’ views, strategies, and current perceptions regarding their ICT start-ups. The sample consisted of more than 90 founders of Greek IT start ups who participated in exhibitions as start-up companies during 2018 and 2019 and had completed at least one accelerator program. The study analyzed the dataset of a previous research project, using Graph Theory and R as the main tools for statistical analysis, in order to re-examine relationships between the key variables. The study highlighted a set of critical relationships and facts that were not revealed in past research. The dataset was first analyzed with the use of SPSS software for Pearson correlation, but using Graph Theory revealed a different picture. A literature review was also conducted to examine the key issues of entrepreneurship and Graph Theory and their applications to success factors for start-ups. The research findings provided a more precise understanding of the dynamics of Greek ICT start-ups, as well as the importance of Graph Theory for analyzing complex phenomena and business ecosystems. The findings may be useful for entrepreneurs, as they strive to increase the success rates of current and future projects, as well as for academics, since Graph Theory reveals a new, likely more effective and accurate way of analyzing data and estimating relationships in complex environments. Keywords: innovation management, marketing, start-ups, founders, business models, entrepreneurship, strategy, Greek, Graph Theory