The paper’s principal purpose is to present the original concept of the project supply chain’s entrepreneurial management. Based on the literature on the subject, one defines the entrepreneurial management concept showing the influence of entrepreneurial management on company operation. Moreover, the paper also outlines the most important concepts of the project supply chain and presents the functioning scheme. Theoretical considerations concerning contemporary theories of entrepreneurial management and project supply chain are the prelude to presenting the concept of entrepreneurial management. The presented approach can be found helpful for the effective management of the project supply chain, which has not yet been thoroughly defined. It should be mentioned that the designed model of the entrepreneurial supply chain management is an original proposal for the paradigm of project supply chains. Both in a classical and project supply chain, a significant role is given to the flow of material resources between the individual chain components. It determines that the project supply chain is mainly driven by the need for its members’ value increase. It was explained that regarding entrepreneurial competences, knowledge can be transferred to other organizations in the whole supply chain. It was also mentioned that the project supply chain’s entrepreneurial management takes into account the flexibility manifesting itself through the establishment of agile project teams, and by focusing on human relationships. It is the basis for the presented concept of the entrepreneurial management model of the project supply chain. AcknowledgmentThe project is financed within the framework of the program of the Minister of Science and Higher Education under the name “Regional Excellence Initiative” in the years 2019–2022; project number 001/RID/2018/19; the amount of financing PLN 10,684,000.00.

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We prove the existence of the Foster-Hart measure of riskiness under the cumulative prospect theory and we study some of its basic properties.

Purpose -This publication has the task of presenting the relationship between the efficient portfolios lying on the efficient frontier with a portfolio which is built using the Foster-Hart risk measure. The aim of the derivative work is to indicate the direction for further research focused around the measure in the context of reducing investment risk. Design/methodology/approach -In the publication the literature in the area of portfolio management was used, as well as the hypothetical data that is formed for the basis of theoretical discussion. The study used analytical methods, including the method of linear programming. Findings -On the basis of the built portfolio based on the Foster-Hart measure and the developed efficient frontier it was stated that the measure has a completely different approach to the management of portfolios in relation to the model of Markowitz. It manifests itself primarily in the method of the risk measurement and its interpretation as well as in the portfolios' construction. Originality/value -The method of building a portfolio was elaborated on by using the Foster-Hart measure and by showing its relationship with the constructed efficient portfolios based on the Markowitz model. Such a presentation in the literature cannot be found. The analysis thus has educational and practical values.

Purpose -the aim of the paper is to present a scheme, which was developed for the analysis of acquisitions in terms of protection from bankruptcy. It was also shown that the scheme can be used in calculating the number of shares, the purchase of which will not be the subject, in theory, to bankruptcy. Design/methodology/approach -For the development of the proposed scheme, the authors used literature and tools-based on financial engineering, and the calculations were carried out on hypothetical data. Findings -Our calculations show that the proposed scheme can be used for the assessment acquisitions of companies; however, it should be taken into account that a number of important assumptions may significantly affect the final evaluation. Originality/value -The development can be considered as complementary to current knowledge on mergers and acquisitions. You can recognize them also as a contribution to separate quantitative research and a voice in the discussion, needed for the development of the subject work.