Pricing options under stochastic volatility: a power series approach

In this paper we present a new approach for solving the pricing equations (PDEs) of European call options for very general stochastic volatility models, including the Stein and Stein, the Hull and White, and the Heston models as particular cases. The main idea is to express the price in terms of a power series of the correlation parameter between the processes driving the dynamics of the price and of the volatility. The expansion is done around correlation zero and each term is identified via a probabilistic expression. It is shown that the power series converges with positive radius under some regularity conditions. Besides, we propose (as in Alós in Finance Stoch. 10:353–365, 2006) a further approximation to make the terms of the series easily computable and we estimate the error we commit. Finally we apply our methodology to some well-known financial models.      

The Organization of Production

The organization of production depends on both technical and governance factors. The integration of recent advances in cost theory into production theory makes it easier to appreciate the joint effects of transaction and coordination costs interacting with wages and capital costs in the decision-making of firms. The corporate function, integrating the production function and the governance function, facilitates the joint analysis of the full array of factors including the effects of interrelatedness and complementarities of new technologies and of pecuniary economies of scale. The corporate function and pecuniary economies of scale also provide new elements in the understanding of the ever present variety of firms in industrial structures and the role of historic time in the theory of the firm.     

Complexity and technological change: knowledge interactions and firm level total factor productivity

The analysis of social interactions as drivers of economic dynamics represents a growing field within the economics of complexity. Social interactions are a specific form of interdependence whereby the changes in the behavior of other agents affect utility functions for households and production functions for producers. In this paper, we apply the general concept of social interactions to the area of the economics of innovation and we articulate the view that knowledge interactions play a central role in the generation of new technological knowledge so that innovation becomes the emergent property of a system, rather than the product of individual actions. In particular, we articulate and test the hypothesis that different layers of knowledge interactions play a crucial role in determining the rate of technological change that each firm is able to introduce. The paper presents an empirical analysis of firm level total factor productivity (TFP) for a sample of 7,020 Italian manufacturing companies observed during the years 1996–2005. This will enable us to identify the distinctive role of regional, inter-industrial and localized intra-industrial knowledge interactions as distinctive and significant determinants, together with internal research and innovation efforts, of changes in firm level TFP.     

The diffusion of an organizational innovation: International data telecommunications and multinational industrial firms

The paper analyses the structural and technological determinants of the diffusion of international data network as a major technological and organizational innovation in a sample of 40 U.S. and European multinational firms in the period 1963–1980. According to the results faster adopters appeared to be large U.S. firms, exposed to worldwide competition, with inhouse telecommunication skills. Smaller European firms adopted the technology later, often pushed by the provision of ad hoc technical solutions by service and hardware marketing firms. Smaller latecomers with centralized management structures were, however, quicker in the diffusion process. Both in the interfirm and intrafirm diffusion ‘implicit knowledge’ was a more effective factor than R–D intensity.     

The efficiency of social public expenditure in European countries: a two-stage analysis

Do European countries differ in the efficiency of their welfare policies? And which factors can account for such variability? To address these questions, we perform a two-stage efficiency analysis. First, based on a composite output indicator for social protection expenditure, we measure efficiency by means of the Free Disposable Hull and Data Envelopment Analysis techniques. Second, we perform an econometric analysis to identify the factors that can be associated to cross-country differences. We find that countries scoring higher efficiency have higher education and GDP levels, a smaller population size, a lower degree of selectivity of their welfare systems and a lower corruption level.     

Localised Technological Change: The Interaction Between The Generation And The Diffusion Of New Technologies

The main contribution of this paper is to explore the role played by heterogeneity in supply and demand in selecting technological paths amongst many different alternatives, and in localising technological change in niches of potential adopters. Technological change is therefore inherently localised. For given levels of technological superiority, the innovations that are selected during the diffusion process are shown to be sensitive to the specificities of the production process at those points.     

Cost Accounting for War: Contracting Procedures and Cost-plus Pricing in WWI Industrial Mobilization in Italy

The aim of this paper is to explore the role played by cost accounting in Italy's Industrial Mobilization system and in the largest firm manufacturing weaponry, Ansaldo of Genoa, during WWI. While in other countries such as the UK and the USA, efficiency in buying and managing war material was an important part of military strategy, in Italy, various factors impeded it. This paper focuses on contracting procedures adopted by the Ministry of War and Ministry of Munitions and looks at the cost accounting practices in Ansaldo to see how costs were determined and how prices were set. We found a paradox. On the one hand, despite knowledge of costing, the government did not impose cost controls on the producers of war material, nor on their profit rates. On the other hand, examining Ansaldo's cost sheets we discover they underestimated their production costs leading the firm to losses despite its favorable political position. This paper contributes to the theoretical debate about the relationships between accounting and war in the Italian context where lobbying, collusion, bribery and private interests dominated the administrative behavior of public and private actors instead of efficiency, accountability and honesty.     

Optimization of Monte Carlo Procedures for Value at Risk Estimates

This paper proposes a methodology which improves the computational efficiency of the Monte Carlo simulation approach of value at risk (VaR) estimates. Principal components analysis is used to reduce the number of relevant sources of risk driving the portfolio dynamics. Moreover, large deviations techniques are used to provide an estimate of the minimum number of price scenarios to be simulated to attain a given accuracy. Numerical examples are provided and show the good performance of the methodolgy proposed.
(J.E.L.: C15, G1).     

The network of networks: Localized technological change in telecommunications and productivity growth

Radical innovations in the usage of telecommunication services have drastically changed the role of telecommunications in the economy. Today the usage of telecommunications services is associated with the opportunity to extract significant quasi-rents. An empirical analysis of the Italian case in the mid-eighties confirms the significant difference between telecommunications cost share and marginal productivity levels. The opportunity to reap transient quasi-rents has in turn pushed users to innovate so as to become major players in the arena of technological change in telecommunications and information technologies. In this context the notion of network of networks, implemented in the European Union, seems most appropriate to push the dynamic efficiency of the system and accommodate both centrifugal and centripetal innovations, yet also to retain network interoperability and interconnectivity.     

The evolution of the industrial organisation of the production of knowledge

This work elaborates the notion of localised technological knowledge,based upon the distinction between information, competence andknowledge, and analyses the emergence of the new knowledge industry.The evolution of the organisation of knowledge production isanalysed through four stylised modes: scientific entrepreneurship,institutional variety, vertical integration and technologicalcooperation. The new trends towards the growth of knowledge-intensivebusiness service industries are detected and underlined. Theyare considered as the outcome of the institutional formationof a market for knowledge based upon a process of increasingappropriability of localised knowledge based on: the blendingof generic scientific information and competence and growingscope of applicability via computer-communication systems; deverticalisationof research activities from the boundaries of corporations;the specification of a demand for technological competence;and the specialising of independent firms in the productionof technological competence and knowledge.