Kalai and Muller’s possibility theorem: a simplified integer programming version

We provide a respecification of an integer programming characterization of Arrovian social welfare functions introduced by Sethuraman et al. (Math Oper Res 28:309–326, 2003). By exploiting this respecification, we give a new and simpler proof of Theorem 2 in Kalai and Muller (J Econ Theory 16:457–469, 1977).     

Timeliness of Spread Implied Ratings

Rating agencies are known to be prudent in their approach to rating revisions, which results in delayed rating adjustments. For a large set of eurobonds we derive credit spread implied ratings and compare them with agency ratings. Our results indicate that spread implied ratings often anticipate the future movement of agency ratings and hence can help track credit risk in a more timely manner. This finding has important implications for risk managers in banks who, under the new Basel 2 regulations, have to rely more on credit ratings for capital allocation purposes, and for portfolio managers who face rating‐related investment restrictions.     

Short reports

In this study, we assessed the epidemiological patterns of suicide terrorism in the civilian population of Pakistan. Information about suicide terrorism-related events, deaths and injuries was extracted from the South-Asian Terrorism Portal (SATP) for the period from 2002 to October 2009. Of 198 events, civilians were involved in 194 events. Civilians accounted for 74.1% (N = 2017) of those who died and 93.8% (N = 6129) of those who were injured. In nine districts, mortality rates were more than one death per 100,000 inhabitants per year. The yearly trend showed a shift of attack targets from foreigners and sectarian targets in 2002–2005 to security forces or general public in 2006–2009. Attacks on public installations (mosques) or political gatherings resulted in a significantly greater (P ≤ 0.02) number of deaths (22 vs. 8) and injuries (59 vs. 24) per event compared with security installations. These results show that prevention might focus on political negotiation with armed groups and that appropriate measures should be taken to protect mosques and political gatherings.     

The Paradox of Corporate Social Responsibility Standards

The purpose of this paper is to provide a constructive criticism of Corporate Social Responsibility (CSR) standards. After pointing out a number of benefits and limitations in the effectiveness of CSR standards, both from a theoretical point of view and in the light of empirical evidence, we formulate and discuss a Paradox of CSR standards: despite being well-intended, CSR standards can favor the emergence of a thoughtless, blind and blinkered mindset which is counterproductive of their aim of enhancing the social responsibility of the organization. We analyze three problems that might underlie the Paradox—namely the problem of deceptive measurements; the problem of responsibility erosion and the problem of blinkered culture. We apply the philosophical tradition of American Pragmatism to reflect on these issues in relation to different types of existing standards, and conclude by suggesting a number of considerations that could help both CSR standards developers and users to address the Paradox.     

Psychosocial Influences on Children's Food Consumption

This exploratory study generated a grounded theory of factors influencing children's diets, particularly those that contribute to suboptimal eating and ultimately child obesity. The study involved 124 children (aged 6–12 years) and 39 of their parents from three separate junior schools (including a lower, middle, and higher socioeconomic school). Research methods included (i) interviews with children and parents and (ii) observations, drawings, and lunchbox audits with children. The findings suggest that children and parents prioritize psychosocial needs over physiological needs during food selection and consumption. This tendency toward psychosocial eating appears to be strongly reinforced by food advertising.     

Rating model arbitrage in CDO markets: An empirical analysis

We analyze whether information asymmetry between issuers and investors leads to rating model arbitrage in Collateralized Debt Obligation markets. Rating model arbitrage is defined as the issuer's deliberate capitalization of information asymmetry at the investor's cost on the basis of different rating processes. Using data from CDO transactions grouped by both rating agencies and underlying rating methodologies, we test for homogeneity of characteristic transaction features within the group and heterogeneity between the different groups. We find that the hypothesis stating non-existence of rating model arbitrage on the basis of information asymmetry does not hold as individual patterns of transaction characteristics within each group could be identified.     

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.