Pricing and Informational Efficiency of the MIB30 Index Options Market. An Analysis with High‐frequency Data

We analyse the pricing and informational efficiency of the Italian market for options written on the most important stock index, the MIB30. We report that a striking percentage of the data consists of option prices violating basic no‐arbitrage conditions. This percentage declines when we relax the no‐arbitrage restrictions to accommodate the presence of bid/ask spreads and other frictions but never becomes negligible. We also investigate the informational efficiency of the MIBO and conclude that option prices are poor predictors of the volatility of MIB30 returns. This conclusion is robust to a number of statistical and sampling methods.
(J.E.L.: G13, G14).     

Health Systems and Health Reform in Europe

The organisation of health care differs widely across Europe. Access to services, financing schemes, incentives for better care, and administrative efficiency are challenges that are being dealt with in a variety of ways. Are insurance-based systems the best solution for balancing resources and services or are national health funds preferable? Does the introduction of competition fulfil high hopes for better service at lower costs? What are the relative advantages and drawbacks of central and local management of health care?     

Enabling and inhibiting factors in adoption of Electronic-Reverse auctions: A longitudinal case study in grocery retailing

Abstract

The paper aims to explore the factors that enable or inhibit the use of Electronic-Reverse Auctions (E-RAs) in the buying process of a large food retail organization, through a category management perspective. Using a case-study analysis based on in-depth interviews, examination of internal documents, simulation and direct observation of some E-RAs, we studied the experience of an Italian-based retailer conducting E-RAs during a two-year period. This approach enabled us to propose an E-RAs development model in retail buying groups, discussing enabling and inhibiting factors such as product, market, organizational and strategic factors. Propositions are developed to stimulate thought and provide guidance for future research.     

Common serial correlation and common business cycles: A cautious note

This paper examines the frequency-domain implications of the serial correlation common feature in order to evaluate its merits as an indicator of common business cycles among economic variables. It is shown that the presence of the serial correlation common feature in the first differences of a set of I(1) time series is not informative for the degree and the lead-lag structure of their comovements at the business cycle frequencies. First version received: October 1997/Final version received: December 1998     

Manipulation of profits in Italian publicly-funded healthcare trusts

ABSTRACT

This paper examines earnings management in state-funded Italian healthcare trusts. Italy is unique in requiring trusts to have balanced budgets by law. Small negative and positive deviations from a balanced budget had quite different consequences. The authors found no evidence of accounting manipulation when trusts posted small losses. However, trusts were found to manipulate discretionary accruals, provisions and non-operating expenses to reduce small positive deviations from zero-profit.     

Managing Environmental Risk in Presence of Climate Change: The Role of Adaptation in the Nile Basin of Ethiopia

This study investigates the impact of climate change adaptation on farm households’ downside risk exposure in the Nile Basin of Ethiopia. The analysis relies on a moment-based specification of the stochastic production function. We use an empirical strategy that accounts for the heterogeneity in the decision on whether to adapt or not, and for unobservable characteristics of farmers and their farm. We find that past adaptation to climate change (i) reduces current downside risk exposure, and so the risk of crop failure; (ii) would have been more beneficial to the non-adapters if they adapted, in terms of reduction in downside risk exposure; and (iii) is a successful risk management strategy that makes the adapters more resilient to climatic conditions.     

Studying governance within the British public sector and without

Abstract

In the critical arena of public management and policy debates several schools currently try to make sense of governance structures and processes, although one has so far had the strongest impact in terms of academic and policy influence in particular in the United Kingdom: network governance.

Network governance has been associated with Stakeholder Capitalism – as represented for instance by the European (usually German) social-democratic settlement – and as the direct opposite of the New Public Management (as the epitome instead of Shareholder Capitalism). In this essay it will be argued that the alleged novelty of the reforms being currently implemented under the aegis of the ‘modernization’ or (network) governance rhetoric (by the Blair government, for instance) must be questioned, since they are the direct inheritors of the NPM tradition. Through the development of a multiparadigmatic model of ethical and organization theories it will be shown that alternatives to network governance are not only thinkable but also (institutionally) practicable.     

The distribution of technological progress

The size distribution of the domains of US-patented technological knowledge obeys an exponential law, revealing a disproportionable concentration of progress among larger domains. Our analyses suggest that this phenomenon is explained by a combination of two factors. First, domains’ trajectories of growth have inherently different potentials. Second, differences in domains’ potentials are magnified by a mechanism—domains’ self-hybridization—endogenous to the process of knowledge growth. Our results show that in addition to being stable, the observed distribution of technological progress is likely to arise under very general conditions.