University of Mannheim

About: University of Mannheim is a education organization based out in Mannheim, Germany. It is known for research contribution in the topics: Context (language use) & Politics. The organization has 4448 authors who have published 12918 publications receiving 446557 citations. The organization is also known as: Uni Mannheim & UMA.

Religious Beliefs, Gambling Attitudes, and Financial Market Outcomes

Abstract: We use religious background as a proxy for gambling propensity and investigate whether geographical variation in religion-induced gambling norms affects aggregate market outcomes. We examine four economic settings in which the recent literature has suggested a role for gambling and speculation. Our key conjecture is that gambling propensity would be stronger in regions with higher concentration of Catholics relative to Protestants. Consistent with our conjecture, we find that religion-induced gambling preferences influence the portfolio decisions of institutional investors. Investors located in regions with high Catholic-Protestant ratio (CPRATIO) exhibit a stronger propensity to hold stocks with lottery features. Further, in a corporate setting, we show that broad-based employee stock option plans, which are likely to appeal more to employees with stronger gambling preferences, are more popular in high CPRATIO regions. Examining the aggregate impact of gambling on stock returns, we find that the initial day return following an initial public offering is higher for firms located in high CPRATIO regions where local speculative demand is expected to be stronger. In a broader market setting, we find that the magnitude of the negative lottery-stock premium is larger in high CPRATIO regions. Collectively, our results indicate that religious beliefs, through their influence on gambling attitudes, impact investors' portfolio choices, corporate decisions, and stock returns.

Loan Growth and Riskiness of Banks

Abstract: We investigate whether loan growth affects the riskiness of individual banks in 16 major countries. Using Bankscope data from more than 16,000 individual banks during 1997-2007, we test three hypotheses on the relation between abnormal loan growth and asset risk, bank profitability, and bank solvency. We find that loan growth leads to an increase in loan loss provisions during the subsequent three years, to a decrease in relative interest income, and to lower capital ratios. Further analyses show that loan growth also has a negative impact on the risk-adjusted interest income. These results suggest that loan growth represents an important driver of the riskiness of banks.

Measurements and mitigation of peer-to-peer-based botnets: a case study on storm worm

Abstract: Botnets, i.e., networks of compromised machines under a common control infrastructure, are commonly controlled by an attacker with the help of a central server: all compromised machines connect to the central server and wait for commands. However, the first botnets that use peer-to-peer (P2P) networks for remote control of the compromised machines appeared in the wild recently. In this paper, we introduce a methodology to analyze and mitigate P2P botnets. In a case study, we examine in detail the Storm Worm botnet, the most wide-spread P2P botnet currently propagating in the wild. We were able to infiltrate and analyze in-depth the botnet, which allows us to estimate the total number of compromised machines. Furthermore, we present two different ways to disrupt the communication channel between controller and compromised machines in order to mitigate the botnet and evaluate the effectiveness of these mechanisms.

Why Organization Theory Needs Historical Analyses-And How This Should Be Performed

Abstract: One of the forefathers of sociology and organization theory, Max Weber, was as much a historian as a sociologist. He was convinced that in order to understand contemporary institutions one has to know how they had developed in history. For him, history and sociology were inseparable disciplines. When he took over his last chair in Munich, he dryly commented: “I now happen to be a sociologist according to my appointment papers” (Burke 1992 , p. 11).