All authors who send their manuscripts to the 13th International Conference on Opportunities and Challenges in Management, Economics and Accounting and whose articles are published on the conference proceedings retain full copyright of their articles. All the research works published in the OMEACONF Conference Proceedings are meeting the Open Access Publishing requirements and can be freely accessed, shared, modified, distributed and used in educational, commercial and non-commercial purposes under a Creative Commons Attribution 4.0 International License (CC BY 4.0). Authors grant OMEACONF a license to publish their article and identify OMEACONF as the original publisher. They also grant any third party the right to use, distribute, and reproduce the article in any medium, provided the original work is properly cited.