Esophageal calcification after corrosive injury

A clinically silent case of intramural esophageal calcification secondary to corrosive injury is presented. Computed tomography (CT) demonstrated a circular calcified esophageal wall over a distance of 5 cm leaving a residual esophageal lumen of 5 mm.     

Inflation dynamics and the cost channel of monetary transmission

Evidence from vector autoregressions indicates that the impact of interest rate shocks on macroeconomic aggregates can substantially be affected by the so-called cost channel of monetary transmission. In this paper, we apply a structural approach to examine the relevance of the cost channel for inflation dynamics in G7 countries. Since firms’ costs of working capital increase with interest rates, we augment a (hybrid) New Keynesian Phillips curve by including the short-run nominal interest rate. We find significant and varying direct interest rate effects for the majority of countries, including member countries of the EMU. Simulations further demonstrate that the estimated interest rate coefficients can substantially affect inflation responses to monetary policy shocks, and can even lead to inverse inflation responses, when the cost channel is - relative to the demand channel - sufficiently strong.     

Krankenversicherungswettbewerb und Prämienregulierung

Ohne Zusammenfassung     

Earthquake or glacier? How CEO charisma manifests in firm strategy over time

Numerous studies have focused on CEO charisma as an antecedent to firm performance, but this literature has largely overlooked the possibility that charisma manifests in more proximal strategic initiatives that (unlike performance) are largely under the CEO's control. In this study, we integrate perspectives from the upper echelons and charismatic leadership literatures to argue that CEO charisma influences year‐over‐year strategic change, the degree to which strategies deviate from industry central tendencies, and the degree of emphasis on corporate social responsibility. We also theorize that, depending on the outcome in question, the effects of charisma can become both amplified and diminished as CEO tenure advances. Employing a novel data collection approach for a sample of 113 S&P 500 CEOs, we find broad support for our theory. Copyright © 2014 John Wiley & Sons, Ltd.     

Zukunft der Versicherung – Versicherung der Zukunft

The insurance industry is currently characterized by a long-lasting low-interest period and various legislative proposals. Especially the bundling of the requirements of Solvency II, the so called “interest back-up reserve” and the achievement of promised guarantees in the current interest rate environment represent a major challenge for the life insurance industry. In a joint study by Deloitte, E?+?S Rück and the University of Hannover, within the sense of qualitative research by collecting broad expert knowledge the economic effects of the regulatory provisions were discussed. Another focus of research refers to the expectations of the industry representatives regarding the advancing digitization. This paper presents selected reactions and consequences of life insurance companies and derives recommendations for that industry.     

The impact of demographic change on human capital accumulation

This paper investigates whether and to what extent demographic change has an impact on human capital accumulation. The effect of the relative cohort size on educational attainment of young adults in Germany is analyzed utilizing data from the German Socio-Economic Panel for West-German individuals of the birth cohorts 1966 to 1986. These are the cohorts which entered the labor market since the 1980s. Particular attention is paid to the effect of changes in labor market conditions, which constitute an important channel through which demographic change may affect human capital accumulation. Our findings suggest that the variables measuring demographic change exert a considerable though heterogeneous impact on the human capital accumulation of young Germans. Changing labor market conditions during the 1980s and 1990s exhibit a sizeable impact on both the highest schooling and the highest professional degree obtained by younger cohorts.     

A macroeconomic perspective on Knowledge Management

This paper provides a theory of the interactions between knowledge codification, firm-level organization structures, information diffusion and the dynamics of technological competition. At the firm level, we focus on incentives to design Knowledge Management policies based on the codification of soft into hard information. At the aggregate level, we discuss the endogenous nature of knowledge spillover and the implications for macroeconomic growth. The model predicts the existence of a bell shaped relationship between knowledge codification and technological competition.     

Transmission of Nominal Exchange Rate Changes to Export Prices and Trade Flows and Implications for Exchange Rate Policy*

We discuss how the welfare ranking of fixed and flexible exchange rate regimes in a New Open Economy Macroeconomics model depends on the interplay between the degree of exchange rate pass‐through and the elasticity of substitution between home and foreign goods. We identify combinations of these two parameters for which flexible and fixed exchange rates are superior with respect to welfare as measured by a representative household's utility level. We estimate the two parameters for six non‐EMU European countries (Czech Republic, Hungary, Poland, Slovakia, Sweden, and the UK) using a heterogeneous dynamic panel approach.     

Intra- and international risk-sharing in the short run and the long run

We investigate empirically how industrialized countries and US states share consumption risk at horizons between 1 and 30 years. US federal states share about 50% of their permanent idiosyncratic risk through cross-state capital income flows. While insurance against transitory fluctuations in output is virtually complete, OECD countries do not share any of their permanent idiosyncratic risk. Our results suggest that purely transaction cost based theories cannot explain the home bias, since the potential welfare gains from insurance against permanent shocks would by far outweigh that of insuring against transitory variation. We conclude that permanent and transitory shocks constitute two qualitatively different kinds of risk and that various forms of endogenous market incompleteness may render permanent shocks a lot harder to insure, in particular at the international level.