THE WIENER–HOPF TECHNIQUE AND DISCRETELY MONITORED PATH‐DEPENDENT OPTION PRICING

Fusai, Abrahams, and Sgarra (2006) employed the Wiener–Hopf technique to obtain an exact analytic expression for discretely monitored barrier option prices as the solution to the Black–Scholes partial differential equation. The present work reformulates this in the language of random walks and extends it to price a variety of other discretely monitored path‐dependent options. Analytic arguments familiar in the applied mathematics literature are used to obtain fluctuation identities. This includes casting the famous identities of Baxter and Spitzer in a form convenient to price barrier, first‐touch, and hindsight options. Analyzing random walks killed by two absorbing barriers with a modified Wiener–Hopf technique yields a novel formula for double‐barrier option prices. Continuum limits and continuity correction approximations are considered. Numerically, efficient results are obtained by implementing Padé approximation. A Gaussian Black–Scholes framework is used as a simple model to exemplify the techniques, but the analysis applies to Lévy processes generally.     

On the pro-trade effects of immigrants

This paper investigates the causal effect of immigration on trade flows using Italian panel data at the province level. We exploit the exceptional characteristics of the Italian data (the fine geographical disaggregation, the very high number of countries of origin of immigrants, the high heterogeneity of social and economic characteristics of Italian provinces, and the absence of cultural or historical ties with the countries where immigrants come from) coupled with the use of a wide set of fixed effects and an ‘instrument’ based on immigrants’ enclaves. We find that immigrants have a significant positive effect on both exports and imports, but much larger for the latter. The pro-trade effects of immigrants tend to decline in space, and even turn negative when large ethnic communities are located too far away from a specific province (via a trade-diversion effect). Moreover, while our data show inter-ethnic spillovers for exports, we find no evidence that networks between different ethnicities affect provinces’ imports. Finally, we provide evidence of a substantial heterogeneity in the effects of immigrants: the impact on trade tends to be larger for immigrants coming from low-income countries, for earlier waves of immigrants, and for least advanced provinces (Southern Italy).     

Non‐Tariff Measures,Specific Trade Concerns and Tariff Reduction

This paper studies the determinants of the recent proliferation of Specific Trade Concerns raised at the WTO on non‐tariff trade measures (NTMs), with a focus on sanitary and phytosanitary (SPS) and technical barriers to trade (TBTs). Even though NTMs are imposed de jure to protect consumers from unhealthy products, they increase trade costs de facto. So, when tariff protection lowers, NTMs become effective barriers to trade and the exporting countries can complain at the dedicated committee at the WTO (STCs). Therefore, we study whether STCs are raised by exporting countries as a consequence of tariff reductions in importing countries, that is when non‐tariff measures become barriers to trade. Using a recent database on STCs over the period 1996–2010, we find empirical evidence that SPS and TBT concerns are raised by exporting country as a consequence of importer's tariff cut.     

Debt developments and fiscal adjustment in the EU

Since the financial crisis in 2008–09, concern over the sustainability of some EU countries’ sovereign debt has continued to mount higher and higher. This paper explores the ways in which the financial crisis caused the deterioration of European debt-to-GDP ratios, examines which countries are on sustainable debt paths and quantifies the fiscal adjustment required per country for debt sustainability.     

Participation Versus Social Exclusion

The different experience of unemployment and of poverty in the two main Western economic systems (roughly, Europe and the US) demonstrates that a simple economic approach to these problems does not exist. In this paper I deal with the question of the impact of technological change on productive activities, employment and income distribution.The main idea is the following: technological progress may lead to an impoverishment of the disadvantaged people in a free-market society, as a consequence of their inability to adjust their skills to the new requirements of the labour market. By contrast, a just society, grounded on moral principles, recognizes that the distributive criterion has to take into account not only individual contributions to production, but also the relative needs of the individuals. In that context, everyone should be better off after a technological change, since it is fair that everyone gains some advantage from a generalized improvement in the productive conditions of society. A policy that adopts this perspective should provide an effective guard against the danger of social exclusion that strikes modern societies.     

Sectoral border effects and the geographic concentration of production

The object of this paper is to study the relationship between the border effect and the geographic concentration of production. We explain this relationship through the home market effect and test the robustness of this explanation by using an analysis that considers the European single market. A sectoral gravity equation is estimated with different econometric estimators; in particular, we discuss a recently suggested estimator for log-linear CES models. Overall, our findings suggest a steady relationship between the border effect and the concentration of production. Furthermore, the analysis of concentration through a synthetic index provides us with valuable insights into the structure of the European industry.     

Extending lead-user theory to online brand communities: The case of the community Ducati

While research on user innovations within communities exists mainly in offline contexts, few studies have attempted to define the profile of lead users in online (or virtual) communities, and even fewer have been conducted in the specific context of online brand communities, formed by people with a “common interest in a brand,” in its evolution and in the discourse about it. This study focuses on innovative activities within the Ducati Motor online community. The research reveals the following characteristics as crucial factors for the identification of lead users in online brand communities: willingness to collaborate, product knowledge and strategic alignment with the brand identity. Our sample consists of 2071 messages posted by 572 Ducati Motor virtual community members in a specific blog developed by Ducati Motor with the purpose of involving members in a collaborative innovation process that took nearly 14 months. Several implications for scholars and new product development managers are discussed.     

Organizing professionals and their impact on performance: the case of public health doctors in the Italian SSN

ABSTRACT

Hybrid professional managers have been associated with improvements in the performance of public sector organizations. However, less attention has been given to differences within this category. Drawing on board human capital theory, we focus on an emerging group of ‘organizing professionals’ with earlier and deeper exposure to management training and education: generalist clinical hybrids drawn from public health in the Italian healthcare system. Specifically, we investigate the impact that these hybrid hospital CEOs have on organizational performance in comparison with other backgrounds. The results indicate that this form of generalist hybrid professionalism has distinct, if not dramatic, consequences for performance.     

Patient and Public Participation in the English NHS: An assessment of experimental implementation processes

This article analyses the impact of the implementation of a set of policies introduced after 1997 in the English National Health Service aimed at increasing patient and public involvement in organizational decision-making processes. Adopting the ambiguity/conflict policy implementation model and based on a year-long research project, it shows that patient and public engagement can be more effectively achieved when there is room for interpretation and discretion in selecting the means for involvement. Local initiatives, based on effective leadership governance mechanisms and organizational learning processes, are more likely to generate inclusiveness, shared ownership, and user-centredness than a top-down framework for involvement.     

Non‐residents’ Holdings,Market Volatility and Public Debt Sustainability. An Analysis with Data for Italy

Non‐residents’ holdings (NRH) of debt securities have been large in euro area countries, but during the euro area debt crisis some of those countries experienced a steep contraction of such holdings. The analysis aims to provide a data‐founded explanation of what is behind the decrease observed in 2011 by testing two alternative hypotheses. At the same time, we discuss how that decrease might have endangered the sustainability of public debt and study the empirical relevance of the most important of those processes. The topics presented refer to any advanced economy, but we check the hypotheses discussed by taking Italy as a case study because of data constraints. Italy is an interesting country to consider since it is a very large debt issuer. Our results point towards the importance of market volatility to explain variations of NRH, but those holdings do not seem to influence debt sustainability.