Journal of Sustainable Economics

Exploring the Intersections of Blue, Green, and Grey Economies in Nigeria: Opportunities, Challenges, and Strategic Pathways for Sustainable Development

2025-05-08T10:31:11+07:00

This review paper explores the integration of Blue, Green, and Grey economies as viable pathways for sustainable economic development in Nigeria. By examining the principles, current status, challenges, and opportunities of these economic models, the study highlights their potential in diversifying Nigeria's economy, enhancing environmental sustainability, and promoting social inclusion. The Blue Economy focuses on harnessing Nigeria’s vast coastal and marine resources for sustainable fisheries, aquaculture, and maritime activities. The Green Economy emphasizes eco-friendly practices, renewable energy, sustainable agriculture, and land management as means to address climate change and improve food security. Meanwhile, the Grey Economy, predominantly informal, presents opportunities for sustainable urban development, particularly in waste management, recycling, and construction sectors. The study identifies significant challenges, including policy gaps, inadequate infrastructure, limited access to financing, and the need for a more robust regulatory framework. It emphasizes the necessity of an integrated policy approach that aligns with Nigeria’s Vision 2050 and the Sustainable Development Goals (SDGs). Strategic recommendations include fostering public-private partnerships, investing in capacity building, and leveraging innovative financing mechanisms to support sustainability projects. This review concludes that a comprehensive approach to integrating Blue, Green, and Grey economies can enhance Nigeria’s economic resilience, reduce environmental degradation, and promote inclusive growth. The findings serve as a blueprint for policymakers, stakeholders, and researchers interested in advancing sustainable development in Nigeria.

Economic Convergence Among Urban Areas In North Sumatera

2025-05-08T10:46:59+07:00

This research investigates the convergence of the urban regional economy in North Sumatra from 2018 to 2022, employing a quantitative and descriptive approach to analyze the factors influencing the Regional Gross Domestic Product (GRDP). Data, derived from the Central Statistics Agency (CSA), encompasses eight cities: Sibolga, Tanjungbalai, Pematangsiantar, Tebing Tinggi, Medan, Binjai, Padangsidimpuan, and Gunung Sitoli. The study focuses on three independent variables—population (X1), Human Development Index (HDI) (X2), and Open Unemployment Rate (OUR) (X3)—aiming to understand their simultaneous and partial effects on GRDP. Hypotheses are formulated, indicating the anticipated influence of each variable, with the null hypothesis positing no significant effect. Utilizing eViews version 12 for panel data regression analysis, the results reveal that collectively, Population, HDI, and OUR significantly influence GRDP in the urban regions of North Sumatra. However, when analyzed individually, only HDI and TPT exhibit significant impacts, while Population does not. This suggests that the quality of human development and the unemployment rate play pivotal roles in driving economic convergence. The findings contribute to a nuanced understanding of the convergence dynamics in the cities studied, emphasizing the importance of targeted policies to foster inclusive and sustainable economic growth in the region.

Enhancing Supply Chain Performance for Sustainable Development in the Small and Micro Industries The Role of Organizational and Local Culture, Support from Financial Institutions, and Government

2025-05-08T11:10:02+07:00

The economic growth potential of North Sumatra is globally recognized due to the achievement of sustainable development goals. This research aims to explore the integration of environmental, social, economic, organizational, local culture, government, and financial institution support factors that can improve supply chain performance and sustainability for small and micro industries in North Sumatra. The study uses a mixed-methods approach that involves in-depth interviews and structured questionnaires to examine the central roles of these factors. The findings underscore the importance of environmental considerations in supply chain management, the impact of local cultural traditions on organizational performance, and the need for innovative economic solutions to improve efficiency and traceability by government and financial support. The research also suggests the implementation of comprehensive policies that integrate all aspects of collaboration to achieve the Sustainable Development Goals in North Sumatra, addressing deglobalization and geopolitical crises.

Introducing Environmental Taxes in Tanzania: An Empirical Analysis

2025-06-01T18:50:35+07:00

Environmental tax is very crucial to support the government revenue in both developing and developed countries. The aim of this paper is assess the important of introducing environmental taxes in Tanzania. The empirical analysis was used from 13 research articles and different reports from various international institutions database such as International Momentary Fund (IMF), World Bank (WB) and African development bank and Tanzania Revenue Authority (TRA) from semantic scholar, google scholar and research gate. The study found that introducing of environmental taxes are very important since source of revenue, improve the environmental, environmental taxes provide a continued incentive to cut emissions at all levels. The study recommends that the effective environmental taxes should need to be proportionate to the harm done to the environment, the flexibility of environmental taxes to offer comparable abatement incentives on each unit of pollution is one of its benefits, the tax rate need to be proportionate to the harm done to the environment and reflecting environmental damage.

Factors Affecting Rupiah Exchange Rate on US Dollar

2025-06-01T18:43:43+07:00

This research aims to analyze the influence of interest rates, inflation, and economic growth (GDP) on the rupiah exchange rate on the US dollar. The results of research was analyzed using SPSS Version 25.0. It reveals that the determinant coefficient (R) of 0.6580, which mean the correlation between interest rates, inflation, and economic growth on the rupiah exchange rate for the US dollar is 65,80%. Meanwhile, the R _Squarevalue is 0,433, which means that the contribution of the interest rate, inflation, and economic growth variables to the rupiah exchange rate on the US dollar is 43,33% and the rest was influenced by other variables. Considering at each variable, it is known that the interest rate variable has a significant and influential effect on the rupiah exchange rate on the US dollar. The inflation variable has an influence but is not significant on the rupiah exchange rate on the US dollar. Meanwhile, the economic growth variable has an influence and is significant on the rupiah exchange rate on the US dollar. The implication of this research is that the government must concern to interest rates and economic growth in order to increase the rupiah exchange rate on the US dollar.