Lucian Gaban

1 Decembrie 1918 University | UAB · Finance

Rough set theory is a mathematical approach that deals with the problems of uncertainty and ambiguity in knowledge. Neighborhood systems are the most effective instruments for researching rough set theory in general. Investigations on boundary regions and accuracy measures primarily rely on two approximations, namely lower and upper approximations,...

Using networks to analyze time series has become increasingly popular in recent years. Univariate and multivariate time series can be mapped to networks in order to examine both local and global behaviors. Visibility graph-based time series analysis is proposed herein; in this approach , individual time series are mapped to visibility graphs that c...

In the structural analysis of discrete geometric data, graph kernels have a great track record of performance. Using graph kernel functions provides two significant advantages. First, a graph kernel is capable of preserving the graph’s topological structures by describing graph properties in a high-dimensional space. Second, graph kernels allow the...

Getting access to sufficient funding is the keystone for the development of any business, but especially for small and medium enterprises (SMEs). These economic entities are crucial players in the global economy since they include almost 90% of companies, provide jobs for nearly 50% of the global workforce, and enhance long-term economic growth. In...

This research study examines the factors that determined economic growth measured by gross domestic product, gross value added, final consumption expenditure of households, and gross fixed capital formation across a sample of 36 European countries during the time frame Q3 2018−Q3 2021. We conducted a panel data analysis with the first-difference ge...

Forecasting price changes is very important for the process of estimating and managing market risk in financial markets. Price changes in financial markets may also depend on non-market factors. Considering this situation, the study investigates the effect of the COVID-19 pandemic on Borsa Istanbul. It tackles changes in the fractal dimensions of t...

The study investigated the impact of factors such as non-performing loans, CO2 emissions, bank credit, and inflation on the variable sustainable economic growth for India, Brazil, and Romania during the period 2005–2017, through a panel data analysis. Specifically, we investigated the timeline before, during, and after economic turmoil, with a spec...

The study focuses on the effects of imports, exports, financial direct investment inflowand financial direct investment outflow on sustainable economic growth expressed by variousmacroeconomic indicators (gross domestic product, gross domestic savings, gross domestic capital)using the least squares panel method. Sample data were selected for ten Ce...

This paper investigates whether culture plays a role in the size of the shadow economy in countries. We also examine the impact of religion and happiness variables on the size of the shadow economy across countries after controlling for governance, economic development, and the tax burden, using panel data on 31 European countries over the period 2...

Global economic growth is based on increased consumption of electricity both from renewable resources, such as water and wind and non-renewable resources, such as coal (lignite), natural gas or petroleum. Coal continues to represent an important energy source in the European Union, particularly in Germany, France and Spain, where it accounts for 15...

Market economy is mainly characterized by private property. For entrepreneurs, private property allows action according to market realities, opportunities and strategies aimed to succeed. There is no doubt that all small and medium enterprise (SME) achievements are closely linked to profitability, as SMEs constitute a development engine that fuel c...

Using data from 193 countries and territories, the present study investigates the strength of the relationship between shadow economy and corruption via moderation analysis. The literature reports a rather ambiguous relationship between the two variables. By running four multiple regression models with the bootstrapping technique and judicial indep...

The major aim of this paper is to present a non-destructive GIS-based method for a frescoes and Icon analysis pat of the cultural heritage. The proposed methodology is based on the combination of topographic surveys, digital photogrammetry and image processing techniques by means of four control points and one photography of the target at least, th...

The purpose of our study is to identify which fi nancial indicators have a signifi cant impact on the probability of Romanian companies’ bankruptcy risk from the investors’ point of view by studying the impact on the probability of shares delisting from the stock exchange. The research is conducted on a sample of 16 failed and 21 non-failed non-fi...

This paper’s goal is to highlight how happiness affects the level of shadow economy, by using many control variables within different types of potentially determining factors of shadow economy. Another main contribution consists in the systematic comparison between old and new European Union member states in terms of determinants of shadow economy,...

The main goal of this paper is the development of a platform which can insure the effectiveness and the simplification of the loan granting process performed by financial credit institutions and banks oriented to small and medium enterprises. The factors considered include employee’s education, experience, philosophy, self-beliefs and self-understa...

The present paper aims to present the possibilities for creating a geographical information system in order to facilitate administration and monitoring of the territory, by real-time analysis and providing local administrative information of interest, as well as for planning and efficiently monitoring the achievement of the objectives of sustainabl...

In this paper the authors put in evidence the importance of rating in the competitive economy. In this respect the authors present ways of scoring, products of rating agencies, content of the rating system and the importance of financial analysis as a provider of financial data for rating agencies.