Performance of methods to conduct mediation analysis with time-to-event outcomes

Previous studies have discouraged the use of the Cox proportional hazards (PH) model for traditional mediation analysis as it might provide biased results. Accelerated failure time (AFT) models have been proposed as an alternative for Cox PH models. In addition, the use of the potential outcomes framework has been proposed for mediation models with time-to-event outcomes. The aim of this paper is to investigate the performance of traditional mediation analysis and potential outcomes mediation analysis based on both the Cox PH and the AFT model. This is done by means of a Monte Carlo simulation study and the illustration of the methods using an empirical data set. Both the product-of-coefficients method of the traditional mediation analysis and the potential outcomes framework yield unbiased estimates with respect to their own underlying indirect effect value for simple mediation models with a time-to-event outcome and estimated based on Cox PH or AFT.     

Product—Market Choices and Growth of New Businesses

The relationship between product–market strategies and the growth of new firms is incompletely understood. The lack of understanding reflects the absence of a conceptual framework that would explain why certain product–market strategies achieve specified goals more effectively than do others. Prior research links product and market strategy to business growth, but does not clearly separate product line choices from market choices, and provides little guidance with respect to the sequence in which product and market changes should be made. Richard Cardozo, Karen McLaughlin, Brian Harmon, Paul Reynolds, and Brenda Miller propose a "wave" model of product–market choice, which yields hypotheses they evaluate with data from a subsample of 120 firms drawn from a representative sample of new businesses. Results yield preliminary guidelines for product–market strategy for managers of fledgling businesses.     

Goodwill impairments and chief executive officer tenure

The purpose of this paper is to examine the tenure of the chief executive officers of publicly held companies and their corresponding goodwill impairment decisions. An opportunity for managers to manage earnings exists via the Financial Accounting Standards Board's (FASB) goodwill accounting rules. It is hypothesized that CEOs will recognize this impairment in the early years of their tenure because blame can be placed on prior management's acquisition decisions, expensing goodwill early will make future earnings look better, or an objective evaluation of the reporting unit increases impairments.     

Not for turning? Power,institutional ethos and the ethics of irreversibility

Adoption of an ‘ethics of reversibility’ can seem fashionably enlightened, even democratic, but appears less radical when issues of power are opened up. Adopting the motif of keeping, this paper sets its questioning of an on-going individuation of ethics within the context of an insidious reduction of institutional mores to business parlance. Keeping Derrida's ‘philosophy of reversals’ in view, the discussion resists the double bind of attempts to make higher-level decisions ever more ‘irreversible’ on the one hand, while devolving ethical responsibilities for outcomes downwards on the other. In criss-crossing, back and forth, on variations of these themes, the aim of the paper is to contest a division of moral labour in which the more powerful style themselves as ‘not for turning’, while those dispossessed of authority are left to vacillate within the market agendas of flexibility and transparency.     

Assessing dimensions of organizational trust across cultures: A comparative analysis of U.S. and Indian full service hotels

This study delves into the organizational trust based similarities and differences across “individualist” and “collectivist” service employees in hotels. Specifically, the three dimensions of organizational trust, i.e., integrity, commitment and dependability are compared across the two samples from the U.S. and India to highlight how employees perceive the level of each of the three dimensions across cultures. Findings suggest that the three dimensions represent the trust construct across different national cultures. However, in comparing the individual dimension of the trust construct, a significant difference exists between the perceptions of employees in the two cultures, suggesting that perception-based differences exist across cultures.     

Commonalities Between Added Value Ratios and Traditional Return on Capital Employed

This paper provides an empirical comparison between two versions of a new accounting ratio devised by Kay and Davis (1990a, 1990b) and Kay (1993) and the traditional capital employed (ROCE) ratio. The new measures, ‘added value on inputs employed’ (AVIE) and ‘added value on net output’ (AVNO), are both based on a version of residual income they label ‘added value’, but differ in choice of scaling variable. Empirical evidence is provided in this paper on AVIE and AVNO, including cross-sectional patterns, distributional properties, sensitivity to alternative specifications, and rank-ordering and serial-correlation performance compared with ROCE. AVIE and AVNO differ markedly from ROCE in terms of absolute levels and account for at most half of the latter's cross-sectional variation. On the other hand, the results indicate that both the rank orderings and rank predictions of the different measures are very similar. The distributional properties of the added value ratios are sensitive to choice of scaling variable, suggesting that considerable care has to be exercised in drawing conclusions from the absolute rankings of these measures. The new added value ratios provide signals about firm rankings that differ only to a limited degree from those rendered by the traditional ROCE ratio.     

The Methodological and Ethical Issues of Conducting Management Research in the Voluntary Sector

This article discusses the methodological and ethical issues involved in conducting research in the voluntary sector. By outlining a proposed research strategy the authors highlight the challenges and issues that voluntary sector researchers face. The article concludes that the nature of the voluntary sector and the unique characteristics of voluntary organizations not only impact on the development of voluntary sector management theory but also on the research design, ethics and practices adopted for empirical studies into voluntary organizations.     

Calibrating CAT Bonds for Mexican Earthquakes

This article examines the calibration of a real parametric catastrophe bond (CAT bond) for earthquakes sponsored by the Mexican government, which is of a high interest as it delivers several policy‐relevant findings. The results demonstrate that a combination of reinsurance and CAT bond is optimal in the sense that it provides coverage for a lower cost and lower exposure at default than reinsurance itself. A hybrid CAT bond for earthquakes is also priced in order to reduce the basis and moral risk borne by the sponsor and to reflect the value of the loss by several variables.