Most transition countries have an informal sector that can range from 25 to 80 percent of GDP. An informal sector is defined as those economic activities that have no official registration and, as such, they have a tendency to be ungoverned by legal codes. Agents from the inform…
"18" Result
Sort By:
This thesis is devoted to the study of G-convex spaces. In Chapter 1, we introduce the new concepts of M-convex spaces and M-convexity. We present a KKM-type theorem, and two fixed point theorems which illustrate the significance of these concepts. We also define a G-convex stru…
Presented in this study is a wide-ranging investigation into the use of properties of balance in an operational numerical weather prediction context. Initially, a joint numerical and observational study is undertaken. We used the Unified Model (UM), the suite of atmospheric and …
The thesis consists of three chapters in public economics. In the first two chapters, we develop theoretical models to show how citizens' tax evasion and the governor's embezzlement affect public good provision. In the third chapter, I design an experiment to see how position un…
Harvesting offshore wind energy has been a primary stimulus for research recently as more shreds of evidence show the highly unexploited potential it carries. As water depth increases, fixed-bottom foundations become impractical and floating solutions must be adopted for offshor…
Complex nonlinear dynamical systems are frequently utilized and play a significant role in the study of natural science and many other fields. This thesis studies dynamical systems both theoretically and numerically with the help of machine learning, quantifying uncertainties in…
Labor unions are a controversial and relatively little understood species of organization. While empirical research on the effects of unions on various labor market outcomes proliferated in the 1970s and 80s, theoretical understanding of the behavior of unions remains at its ear…
Concussions are complex injuries that affect the brain and body in many ways. Symptoms such as nausea, headaches, and difficulty balancing can ensue for long periods of time in some cases. Sensory reweighting is a system within the body that helps us balance; it includes the vis…
Climate change is one of the major challenges of our current era. The amount of greenhouse gas emissions produced by anthropogenic sources has steadily increased since the industrial revolution, in particular CO 2 , which reached a maximum historical concentration of 409.8 ppm i…
The ability to recognize molecular processes using novel imaging techniques is crucial for medicine, biology and biochemistry. A widely used technique is magnetic resonance imaging (MRI). The signal to noise ratio of the measured data is proportional to the polarization of a giv…
One of the most important mechanisms of foamy oil is the solvents’ non-equilibrium dissolution and exsolution behavior. Therefore, the real-time capturing of these dynamic properties is crucial in analyzing how foamy oil evolves under non-equilibrium state. In this research, var…
This study empirically compares the performance of risk parity (RP) investment strategy with other common investment strategies, resulting either from mean variance theory (MVT) - tangent and minimum variance portfolios - or naïve investments such as the 60/40 or the homogeneous…
A crise financeira de 2007/2008 desencadeou uma onda de críticas à teoria económica. Ataques baseados em quatro críticas principais: os economistas não terem previsto a maior crise desde a Grande Depressão; as autoridades deixarem formar bolhas sem controlo; o falhanço da superv…
Spin-based electronics seek to utilize the properties of electron spin in order to develop next-generation devices with novel functionalities and applications. As with conventional electronics, semiconductors play a critical role in spintronics by allowing for the active manipul…
The collision of cosmic projectiles with a terrestrial planet’s surface forms topographic depressions, known as impact craters. Since planetary surfaces are continuously bombarded, these features can be observed on nearly all solid bodies in the Solar System. On airless bodies w…
This dissertation includes three working papers showing my research on the macroeconomic impact of uncertainty and bubbles. The first two papers look at uncertainty shocks in a dynamic stochastic general equilibrium framework, while the last one focuses on economic bubbles and c…
Carbon dioxide is contributing to the greenhouse effect and a significant part comes from the use of fossil fuels. Utilizing more renewable fuels is therefore a solution to decrease the net release of CO2 emissions to the atmosphere. This can be achieved by substituting fossil f…