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After a brief introduction of the basic properties of group rings, some famous theorems on traces of idempotent elements of group rings will be presented. Next we consider some famous conjectures stated by Irving Kaplansky, among them the zero-divisor conjecture. The conjecture asserts that if a group ring is constructed from a field (or an integral domain) and a torsion-free group, then it does n
Extreme events on the financial market has become an important and high-attention topic. Several well know historical market crashes has taken investors and academics with surprise and there is an urge to understand these anomalous events. The Johansen-Ledoit-Sornette model aims to describe speculative bubbles and anti bubbles on financial markets, often ending in endogenous crashes or rebounds. I
Calculating probability of default (PD) for low default portfolios in a statistically sound way can be a daunting task. For groups of coun- terparties with no or few defaults, e.g. large corporates and nancial institutions, standard approaches like logistic regression fail due to the low number of events. In this thesis, a dierent approach is used. The logit function in logistic regression is repl
Abstract: China and Vietnam have achieved tremendous economic growth in the past decades. The successful development despite their weak formal institutions has deeply challenged conventional economic theories and has demonstrated an undervaluation of informal institutions. In this study, the emerging private sector that has vastly contributed to the rise of China and Vietnam is analyzed based on t
To be in the hospital as a patient is a special occurrence, and patients’ experiences often vary when it comes to care, specifically in relation to hospital staff. The purpose of this study was to examine patients’ and personnel’s experiences of the care in an orthopedic clinic and to explore causal factors that maybe are affecting the experience of care. The community, the organization of the hos
This study has its starting point in the fact that not all developing countries are equally successful in attracting foreign direct investments (FDI). Consequently, this study examines the determinants of FDI in a developing country. In previous research, there has been a recent shift of focus to the institutional environment of the host countries as a determinant of FDI. In line with this develop
The main goal of this thesis is to assess the current packaging development process at one of the leading Swedish corrugated packaging companies, from a food safety perspective, in order to help the corrugated board industry to build knowledge to produce safer packaging for direct food contact. Furthermore, to understand the current situation within a packaging company and to suggest more responsi
Som bakgrund till denna studie ligger uppfattningen att det finns en diskrepans kring hur mellanchefer utför sitt arbete då de både ska leda och bli ledda. Syftet med denna studie är att undersöka hur mellanchefer i Sverige uppfattar sin roll i företaget de verkar i, samt hur de förhåller sig till sina underordnade respektive överordnade. Analysen av det empiriska materialet använder sig av Bourdi
The aim of the study was to examine social work with female victims of intimate partner violence in a slum in Argentina. The resources available and the methods used by the participants were studied. Feminist theory was used to analyse the hierarchal order in the society and an intersectional perspective was applied to the situation of the victims. Empowerment theory was applied on the working met
Bakgrund och Problem: Planering används inom företag för att stödja beslutsfattande och kontroll. För kortsiktig planering har budgeten länge varit det huvudsakliga styrmedlet. Detta är något som inte alltid passar i en snabbföränderlig omvärld, vilket har resulterat i att andra styrmedel som till exempel prognoser har fått en ökad betydelse. Styrverktyget måste anpassas till varje enskilt företag
In the post-crisis environment the discussion about the optimal monetary policy in the Euro Area (EA) is an important topic. A number of scholars have argued that a big part of the problem of the EA is the currency union, because Europe is too heterogeneous for a currency area. This paper asks what impact the existence of the currency union has had on the effectiveness of monetary policy in the EA
The purpose of the study was to examine how high school students in Kenya define and discuss democracy. The aim was further to examine which factors, both positive and negative that are assumed to affect the democratization in their country. The goal was to contribute to a critical debate around how the concept of democracy is defined in existing theories and how it is implemented by development p
Title: The quest for a hedging premium: how hedging strategy affects firm value. Seminar date: 2014-05-22 Course: FEKN90 Authors: Gustav Brobert and Matilda Rist Advisor: Håkan Jankensgård Purpose: The purpose is to investigate the relationship between hedging strategy and firm value. Methodology: A set of six regressions is used to investigate the relationship between hedging strategy and firm
Redovisning av fastigheter är i en föränderlig fas och därför har vi valt att studera detta i denna uppsats. Uppsatsen kommer att behandla hur fastighetsbolag som redovisar i enlighet med K3-regelverket redovisar sitt innehav av fastigheter. K3, komponentmetoden, komponentavskrivning, avskrivningsmetoder, fastighetsredovisning, incitament
The increasing trends of immigration in the affluent North nation-states from the global South has led to the growing awareness of the problem of immigrants' political integration and their resulting participation in the existing political systems of this nation.The importance of this subject is underscored by the challenges posed to the established understanding of nation and citizenship, on
Risk measures such as Value at Risk are highly dependent on a sample of daily returns. The daily return can be measured in different intervals and this thesis examines how the choice of the daily return interval affects derivative pricing, risk measures, fund performance and products with collateral agreements. It is shown that the VaR measure varies significantly with the choice of daily return i
Denna uppsats innehåller en undersökning om hur övervakning och IT påverkar den service kvalitet som ett callcenter levererar. Detta genomfördes genom att genomföra fem intervjuer som var grundade i vårt ramverk. Intervjuerna gav oss förståelse över hur övervakningen och IT påverkade verksamheten och de anställda. Med den information vi fick ut av intervjuerna och ramverket var att övervakningen
Med en begrepps- och innehållsanalys har jag redogjort på vilket sätt Sverigedemokraterna är euroskeptiska och nationalistiska. Jag har använt mig av Anna Lindhs Europatanke som utgångspunkt då hon tidigt såg sambandet mellan euroscepticism och nationalism. Det folkliga stödet för EU i Sverige är lågt och faktorer som t.ex. den ekonomiska krisen har gjort att allt fler ifrågasätter den supernation
Ville Berg Malmborg Skeppstrafiken ökar antalet nanopartiklar i atmosfären I den här studien där aerosoler, luft-partiklar, studerats i marin miljö visar resultaten att utsläpp från skeppstrafiken kan bidra till att öka antalet nanopartiklar i luften. De partiklar som studerats här är i första hand de allra minsta nanopartiklarna som bildas i atmosfären. Dessa bildas vid ungefär 1 nanometer genoThe most important parameter for estimates of the anthropogenic induced climate change is the radiative forcing. In a comparison of the earth’s radiative budget in the year 2011 relative to 1750, the intergovernmental panel on climate change concludes that the largest uncertainty in the total radiative forcing derives from aerosol particles and their ability to modify cloud properties as cloud con
