Optimal portfolio composition and the CAPM

It is commonly assumed that the CAPM implies that all investors hold a balanced portfolio, “the market portfolio,” and investors just determine the proportion of their wealth held in the market portfolio and the risk-free asset. That this is patently at odds with observed investor behavior is sometimes used to justify rejecting the CAPM. However, by assuming that substitute securities exist, in this paper we still obtain the CAPM, although investors neither hold all of the assets in the market nor a balanced shareholding in the assets they do hold.     

Some economic aspects of industrial democracy*

Laurence Hunter argues that although there has been some reference to economic questions in the debate on industrial democracy, they have not received the attention that they deserve. Rather than to provide answers, the purpose of his article is to highlight the importance of the questions, in the hope that others might be encouraged to accept the presented challenge.     

A cost-effectiveness analysis comparing the originator follitropin alfa to its biosimilars in patients undergoing a medically assisted reproduction program from a French perspective

Objective: To assess the cost-effectiveness (CE) of the originator follitropin-α (Gonal-F) in patients undergoing a medically assisted reproduction (MAR) program in comparison to its biosimilars Bemfola and Ovaleap in a French context.

Methods: A CE model was developed for France with a National Health Service (NHS) perspective. Clinical, safety, and dosage data were derived from pivotal clinical trials that compared Gonal-F to Ovaleap and Bemfola. Costs pertaining to drugs, hospitalizations, specialist visits, and examinations were retrieved from the French Programme de Médicalisation des Systèmes d'Information (PMSI) hospital database, literature review, and French clinical experts using 2017?Euro tariffs. In order to test the robustness of results, deterministic one-way sensitivity analyses were carried out on the main variables to assess the impact of treatment cost, probability of birth, ovarian hyperstimulation syndrome (OHSS) rates, and dosage.

Results: The average incremental cost per live birth with OHSS and without OHSS was €259.56 and €278.39, respectively, for Gonal-F compared to the pooled biosimilars (i.e. Ovaleap and Bemfola). GONAL-F had an incremental efficacy of 0.06 over the pooled biosimilars. The incremental cost-effectiveness ratio for Gonal-F with OHSS ranged from €3,274.80 to €4,877.76 compared to the pooled biosimilars, owing to the additional live births reported with Gonal-F. Sensitivity analyses also supported results from the base case analyses, with Gonal-F being cost-effective or the dominant strategy in most cases.

Conclusion: Gonal-F seems to be a cost-effective strategy compared to its biosimilars Ovaleap and Bemfola, irrespective of the incidence of OHSS events, but further data are needed to confirm these results.     

Public Management In North America

Although recent public management reforms in Canada. Mexico and the USA are characterized by similar themes and vocabularies - privatization, customer service, devolution - the nature and extent of actual change reflects the national politics and administrative histories of the three countries. In brief, Canadian public management has been heavily influenced by the need for fiscal retrenchment at both, national and provincial levels, Mexican public management has been influenced by the transition from oligarchic to democratic governance at federal, state and local levels, and USA public management has been preocuppied at the federal level with implementation of the Government Performance and Results Act and with the miscellaneous initiatives organized under the ‘Reinventing Government’ theme as it has been popularized by the Clinton administration.     

Static-arbitrage upper bounds for the prices of basket options

In this paper we investigate the possible values of basket options. Instead of postulating a model and pricing the basket option using that model, we consider the set of all models which are consistent with the observed prices of vanilla options, and, within this class, find the model for which the price of the basket option is largest. This price is an upper bound on the prices of the basket option which are consistent with no-arbitrage. In the absence of additional assumptions it is the lowest upper bound on the price of the basket option. Associated with the bound is a simple super-replicating strategy involving trading in the individual calls.     

Endogeneity in Management Accounting Research: A Comment

Abstract

Chenhall and Moers (European Accounting Review, this issue, pp. 173–195) provide an excellent overview of the econometrics of endogeneity. In response to their discussion I argue that researchers should be courageous enough to set aside endogeneity concerns when their research question is important. Theory does not admit a definite answer to the question whether endogeneity is present in a particular model and econometrics has few technical solutions to offer. Since we cannot be sure endogeneity exists, and if we were to be sure of its existence, there is little we can do about it, researchers are well advised to move on to more serious problems.     

Linking Purchasing to Ethical Decision-Making: An Empirical Investigation

The aim of this study is to examine the decision-making processes at work among French buyers—whether beginners or more experienced individuals, when confronted with a dilemma involving an ethical or non-ethical choice to be made. We go on to illustrate these dilemmas through the use of five original scenarios that reproduce typical situations that arise in a purchasing context in relation to the environment, physical integrity, conflict of interest, or paternalism. Based on 172 participants, the results of our study show that, ethical decision-making depends very clearly on two main factors: expertise and gender. The study also reveals that there is not always a coherent link between ethical choices made and the reasons and justifications given for those choices. Ethical options chosen are not exclusively justified on the grounds of purely ethical reasons but also on the grounds of commercial or economic reasons, or else reasons of avoidance.     

Erratum to: Corporate Socially Responsible Initiatives and Their Effects on Consumption of Green Products

This study extends previous literature on the association between Confucianism and corporate decisions by examining Confucianism’s influence on board gender diversity. Using a sample of Chinese listed firms during the period of 2001–2011 and geographic-proximity-based Confucianism variables, I provide strong and consistent evidence to show that Confucianism is significantly negatively associated with board gender diversity, suggesting that the proportion of women directors in the boardroom is significantly lower for firms surrounded by strong Confucianism atmosphere than for firms located in regions with weak Confucianism atmosphere. This finding also implies that Confucian philosophical system has important impacts on business ethics and women’s status in corporate governance. Moreover, GDP per capita, the proxy for economic development level in a province in which a firm is located, attenuates the negative association between Confucianism and board gender diversity. Above results are robust to different measures of Confucianism and board gender diversity and are still valid after controlling for the potential endogeneity between Confucianism and board gender diversity.     

On science and reform: the parable of the new economics, 1960s–1970s

The article considers Paul Samuelson, Robert Solow, James Tobin, Walter Heller, and Arthur Okun qua political economists. The focus is on their combination of a faith in economic science and a passionate public spirit. The article aims to substantiate two related arguments. The first is that these “new economists” were public intellectuals, regularly addressing public opinion, and engaging with the major economic and social issues of the times; the second is that their value judgements gained the upper hand over scientific discourse when they were confronted with the 1970s inflation.