A Minimizing Risk Strategy for Brazilian Fixed-Income Portfolios

This study presents various risk immunization strategies for fixed-income portfolios, including not only classical measures like duration, convexity, and dispersion but also modern measures such as VaR (value-at-risk) and ES (expected shortfall). Empirical tests are conducted in the Brazilian domestic and international bond market. Because it has had one of highest interest rates since the 1990s, Brazil offers an interesting case study for fixed-income studies. Our results are different for domestic and international bonds. For domestic bonds, using the highest convexity criterion to choose the best portfolio is better than using minimum dispersion, and there is a coincidence between the optimum portfolio selected by the convexity, historical VaR, and ES criteria. For international bonds, our findings indicate that the minimum dispersion strategy performs much better than the maximum convexity strategy. The overall performance of portfolios chosen by minimum VaR and ES criteria is also good, with satisfactory realized returns and squared errors.     

New business models in online hotel distribution: emerging private sales versus leading IDS

This article deals with online hotel distribution. Its purpose is to investigate the private sales formula, which has recently emerged as a new business model. Two case studies are presented: Expedia, a leading internet distribution system (IDS), and Voyage Privé, a private sales Website. The study highlights the main features of the private sales formula by means of a cross-case comparison between the two travel Websites. The article ends with some final remarks on the main strengths and weaknesses of the formula as compared to the leading IDS in the online travel market.     

Querschnittstechnologie Internet – Universallösung für den Arbeitsmarkt der Zukunft?

The ongoing processes of digitalisation in economy and society have certainly important implications, not only for economic growth but also for the future labour market. But, what are the actual effects of this ?Digital Revolution“? Who will be the winners and who will be the losers? This article reviews the current empirical literature and draws relevant policy conclusions. While the growth effects will be substantial, the labour market effects of ICT and broadband technologies and their linkage with industrial production via the “internet of things” are likely to be ambivalent. The authors point to the need for political action with respect to labour market institutions that support workers in adjusting to the rapidly changing work environment in a digital world, and measures designed to reduce the skill gap between “digital natives” and “digital illiterates”. They also identify the need to help increase adoption and use intensity of the new technologies, rather than solely investing in broadband infrastructure.     

Cost-effectiveness of everolimus plus reduced tacrolimus in de novo liver-recipients in the Italian setting

Introduction: Long-term exposure to calcineurin inhibitor-based immunosuppressant (IS) therapy in liver transplant (LT) recipients is associated with renal complications. In the randomized trial H2304, everolimus?+?reduced-dose tacrolimus (EVR?+?rTAC) demonstrated equivalent efficacy and superior renal function compared to standard-dose tacrolimus.

Methods: To evaluate the cost-effectiveness of EVR?+?rTAC vs TAC, in de novo LT patients, a Markov model simulating both liver and kidney function was developed and estimated the long-term outcomes of IS following LT. The analysis used the Italian healthcare payer perspective.

Results: Patients treated with EVR?+?rTAC gained on average 1.92 years and 1.62 quality-adjusted life years (QALYs). The incremental cost-effectiveness ratios (ICER) were €35,851 and €42,567 for LY gained and QALY gained, respectively. For the hepatitis-c sub-population, the ICERs decreased to €22,519 and €30,658, respectively.

Conclusion: EVR?+?rTAC improves survival and quality-of-life and is a cost-effective alternative to calcineurin-inhibitor monotherapy for patients requiring LT.     

Exchange market pressure: some caveats in empirical applications

The Exchange Market Pressure (EMP) index, developed by Eichengreen et al. (1994 Eichengreen, B, Rose, AK and Wyplosz, C. 1994. Speculative attacks on pegged exchange rates: an empirical exploration with special reference to the European monetary system, NBER Working Paper No. 4898  [Google Scholar]), is widely used as a tool to signal whether pressure on a currency is softened or warded off through monetary authorities’ interventions or, rather, a currency crisis has originated. In this article we show how the index is sensitive to some assumptions behind the aggregation of the information available (exchange rates, interest rates and reserves), especially when emerging countries are involved. Specifically, we address the way exchange rate variations are computed and the impact of different definitions of the reserves, and we question the constancy of the weights adopted. These issues compound with the choice of a fixed threshold when crisis episodes are identified through the EMP index. As a result, one should exert caution in subsequent econometric analyses where a dependent binary variable is built to identify crisis periods.     

Why Wine is not Glue? The Unresolved Problem of Negative Screening in Socially Responsible Investing

The purpose of socially responsible investing (SRI) is to: (1) allow investors to reflect their personal values and ethics in their choices, and (2) encourage companies to improve their ethical, social, and environmental performance. In order to achieve these ends, the means SRI fund managers employ include the use of negative screening, or the exclusion of companies involved in “sinful” industries. We argue that there are problems with this methodology, both at a theoretical and at a practical level. As a consequence, current SRI offerings cannot accurately reflect the values and ethical beliefs they propose to represent. Moreover, the use of a␣priori criteria is potentially misleading, as we show by discussing examples of glue and wine making. Applying this flawed approach SRI funds fail to influence the direction of the firms they deem most in need of re-directing. Rather than engaging in the simple a␣priori assumption that some industries are “saints” while others are “sinners” (Freeman, 2007) we suggest a new framework upon which the SRI screening methodology could be grounded. Embracing the philosophical tradition of American pragmatism, we suggest that SRI methodology could be improved by engaging in an analysis based on (1) the actual impacts of the company’s products and services, (2) the company’s relationships with its specific, real stakeholders, and (3) the contingent environment (social, economic, political, legal, and cultural) in which the business operates.     

Parental role models and the decision to become self-employed: The moderating effect of personality

This paper uses social learning theory to examine the influence of parental role models in entrepreneurial families. We distinguish between paternal and maternal role models and investigate how their influence on offsprings’ decision to become self-employed is moderated by personality, specifically the offsprings’ openness. We use data on 461 alumni from eight German universities. Our results show not only that the presence of a parental role model increases the likelihood that individuals become self-employed, but that the influence of role models also depends on the individual’s openness. We discuss the implications of our findings for research on entrepreneurial families, role models, and the psychology of the entrepreneur.     

A simple endogenous growth model with endogenous fertility and environmental concern

We analyze the implications of endogenous fertility choices on both economic and environmental performances in a stylized AK‐type growth model. Differently from what traditionally assumed in the growth and environment literature, we allow pollution to be not only a by‐product of productive activities by firms but also a result of households’ behavior, as suggested by the celebrated IPAT equation. We show that along the balanced growth path equilibrium, economic growth may be non‐monotonically related to the population growth rate as agents care for the environment; moreover, demographic policies can be used both to achieve win‐win outcomes (simultaneously fostering economic growth and improving environmental quality) and to stabilize the otherwise non‐monotonic economic and population growth relationship.