Entrepreneurship and Sustainability Issues is a peer-reviewed journal which publishes original research papers and case studies

Two mainstream topics have been widely discussed over the past few years: ways to reduce the human impact on nature and the way that the industrial revolution 4.0 changes industries. The aim of this research topic is to analyse the positive and negative factors of big data implementation in the sector of cryptocurrency (as part of the industrial revolution 4.0) and in the sector of municipal waste management. The analysis reveals the differences and similarities between the cryptocurrency and municipal waste management sectors in the context of big data. The findings are significant for the estimation of the technological development of digitalized and non-digitalized sectors.

This scholarly investigation conducts a comparative legal analysis to identify the optimal model for state supervision of local self government and municipal rulemaking in Ukraine, with a focus on European Union (EU) practices. The study's dual objectives are to enhance theoretical understanding of local self-governance aligned with international legal norms, and to contribute to the jurisprudential development of local governance in Ukraine, particularly in the context of European integration. Employing a methodical approach, the research juxtaposes international standards with current literature to identify effective state supervision models. This involves analyzing legal and policy frameworks at both national and EU levels, alongside case studies from diverse governance systems, to evaluate their suitability for the Ukrainian context. The findings underscore the importance of a coherent, well-defined supervision model in improving the efficacy of local governance mechanisms in Ukraine. The study emphasizes the need for a legal framework that resonates with international standards, yet is tailored to Ukraine’s unique legal and political landscape. In conclusion, the research advocates for Ukraine's adoption of an optimal state supervision model, incorporating best practices from the EU and considering domestic realities. Such a model is essential not only for advancing local governance but also for ensuring national resilience and stability amid ongoing reforms and external challenges, including economic and geopolitical pressures.

Entrepreneurship and Sustainability Issues is a peer-reviewed journal which publishes original research papers and case studies

Purpose: The study aims to examine the legality of decisions adopted by the Lithuanian Migration Department concerning the change or non-extension of residence permits issued on the basis of family reunification. The analysis focuses on whether these administrative decisions comply with fundamental legal principles – namely proportionality, comprehensiveness, legality and the protection of legitimate expectations – as developed in Lithuanian constitutional doctrine, European Union law and national administrative case law. Methodology: The research applies a qualitative legal methodology combining document analysis of national and EU legal acts regulating residence permits, systematic analysis of the jurisprudence of the Supreme Administrative Court of Lithuania, and comparative assessment of administrative decisions. Supplementary methods include linguistic interpretation of legal concepts, statistical review of case outcomes and generalisation to formulate overarching conclusions regarding administrative practice and judicial review. Findings: The analysis reveals that Migration Department decisions frequently lack sufficient individualisation and rely excessively on generalised conclusions of the State Security Department, without conducting a comprehensive assessment of applicants’ personal, family, social and economic circumstances. Case law demonstrates that where courts genuinely apply the principles of proportionality, comprehensiveness and legality, decisions tend to be more favourable to applicants. Conversely, formalistic or declarative references to legal principles correlate with the dismissal of complaints. The principle of legitimate expectations remains largely absent from judicial reasoning and, in some cases, is explicitly rejected as irrelevant in permit modification procedures. Value: The study contributes to administrative and migration law scholarship by systematically linking abstract legal principles with concrete judicial outcomes in family reunification cases. It highlights structural deficiencies in administrative decision-making and underscores the need for a more substantive application of legal principles to ensure effective protection of fundamental rights, legal certainty and public trust in migration governance.