ABSTRACT
This paper considers stability analysis of a Susceptible-Exposed-Infected-Recovered-Virus (SEIRV) model with nonlinear incidence rates and indicates the severity and weakness of control factors for disease transmission. The Lyapunov function using Volterra-Lyapunov matrices makes it possible to study the global stability of the endemic equilibrium point. An optimal control strategy is proposed to prevent the spread of coronavirus, in addition to governmental intervention. The objective is to minimize together with the quantity of infected and exposed individuals while minimizing the total costs of treatment. A numerical study of the model is also carried out to investigate the analytical results. © 2023 World Scientific Publishing Company.
ABSTRACT
The United States is recognized as the largest economic entity in the world and its financial system has developed steadily through the guidance of the Federal Reserve System for over one hundred years. However, in recent years, the global economic downturn, coupled with the global COVID-19 pandemic, has led to an unprecedented economic depression and rapid decline in the United States financial sector. Although the U.S. government has gradually instructed banks to raise the core quantity but a giant crisis under the economic depression is still present. This study thus takes U.S. commercial banks as the subject of research and employs the two-stage bootstrapped truncated regression to investigate the impacts of increases in required Core, Tier 1, and total capital adequacy ratios on their efficiency. © 2022 Gabriel A. Ogunmola et al., published by Sciendo.
ABSTRACT
External debt correlation and the sustainable economic development pathway within the South Asian sub-region is analysed in this research paper. The longitudinal root-analysis, the pooled ordinary least square, quantile estimation, and output estimation were utilized to evaluate the data obtained from the World Bank Development Indicators for the period of 2000-2018. We discovered that total external debt and external debt services affect 39% plus 31%, respectively, after the robust regression analysis was carried out. Besides that, the findings demonstrate direct expansionary impacts of fiscal policy crosswise in developing economies within the study timeframe. Remarkably, the advancements in state establishments encourage the "gathering impact" of fiscal policy implementation. The findings depict that the entire circumstances set a stiffer restraint on public expenditure, indicating a self-losing fiscal austerity situation which entails the impact of the company's liabilities. Inversely, the unrestrained countercyclical policy bars the knock-on impact of external problems, resulting in an improved economic system activity performance as well as decreasing the probability of economic predicaments after COVID-19.