Superconvergence of the finite element solutions of the Black–Scholes equation

We investigate the performances of the finite element method in solving the Black–Scholes option pricing model. Such an analysis highlights that, if the finite element method is carried out properly, then the solutions obtained are superconvergent at the boundaries of the finite elements. In particular, this is shown to happen for quadratic and cubic finite elements, and for the pricing of European vanilla and barrier options. To the best of our knowledge, lattice-based approximations of the Black–Scholes model that exhibit nodal superconvergence have never been observed so far, and are somehow unexpected, as the solutions of the associated partial differential problems have various kinds of irregularities.     

DOES CONTRACEPTION BENEFIT WOMEN? STRUCTURE,AGENCY, AND WELL-BEING IN RURAL MEXICO

The authors of this paper examine Amartya Sen's contributions to the concept of human well-being from a gender perspective and argue that this concept is particularly useful for explaining women's decisions on contraceptive use. The study draws on data collected in six rural communities of Chiapas, Mexico. It emphasizes the ways in which public discourse articulates the apparent benefits of having small families; the context of the household and community in which rural women make reproductive decisions; and the impact of family planning programs on women's sense of subjective well-being. In particular, it questions the assumption that reduced fertility through contraception necessarily enhances women's well-being and points to the importance that women attach to being a party to reproductive decisions. The authors also explore the links between women's assessment of these decisions and of paid work, and their actual education levels and real possibilities of employment.     

Prospects for integration of financial markets in CIS countries

This article deals with macroeconomic preconditions for financial integration and strengthening the role of the ruble in the post-Soviet space. Particular attention is paid to the developmental priorities of stock markets and the interaction of the CIS exchanges. The integration of the financial infrastructure, the implementation of cross-border payments in national currencies, stock market development, and the growth of investment activity in CIS countries are important areas of integration processes and dealing with the crisis.     

Institutional Investor Ownership and Corporate Pension Transparency

We examine the association between institutional ownership and defined benefit (DB) pension decisions. We find that institutional ownership is negatively associated with pension underfunding, opportunistic increases in the expected rate of return assumption in the presence of underfunding, and significant ownership of the firm's own stock in the DB plan portfolio. Furthermore, these relations are stronger when institutional ownership is concentrated, when institutions are nontransient investors, or when institutions are relatively large. These results suggest that institutional investors are monitoring firm pension decisions, particularly those institutions with stronger monitoring incentives or resources.     

Saturdays of leisure and memories … : The Mexican market ‘La Pulga’ in the San Joaquin Valley (California)

This research note aims to explore the links between food, memory, nostalgia and leisure through a series of weekly visits to an itinerant Mexican market in the United States. Taking an ethnographic approach to the market of La Pulga held in the city of Merced in California’s San Joaquin Valley, we consider how, in the Mexican–American transnational context, this market provides an opportunity for Mexican migrants to interact with other Mexican people, recreating similar social dynamics displayed in traditional food markets in Mexico. We argue that as well as being a food supply centre, this market may be viewed as a space in which Mexican migrants seek to recreate their homeland and to enjoy an alternative leisure experience. Thus, the visit to the market may be observed as a complex activity in which the senses, the social interactions between Mexican migrants and the consumption of food in a festive setting play a central role in enabling these migrants to break with their everyday lives. Likewise, we suggest that the visit to the market every Saturday not only constitutes a leisure activity, but also serves to construct the ethnic and collective migratory identity that links Mexican migrants with their homeland.     

An analysis of the importance of S&;P 500 discretionary constituent changes

The main purpose of this paper is to investigate the impact of the S&P 500 index committee’s decisions to change the constituent firms in the index on benchmark risk measures. The index is managed and changed discretionally by the index committee to make it as representative of the market condition as possible. In addition, the index constantly changes due to important corporate events such as bankruptcies, mergers and acquisitions, and spin-offs. We reconstruct market portfolios by retaining all discretionally deleted firms in a 3 and 5 year periods. We estimate betas at every deletion date in terms of reconstructed market portfolios; we found that these estimate betas are significantly different from the betas obtained from the constantly updated S&P 500 portfolio. We also found that such portfolios are less representative of the business cycle than the actual S&P 500 portfolio. Finally, we found that the portfolio returns obtained by retaining all discretionally deleted firms deviate significantly from the returns of the actual S&P 500 index over the studied period, October 1989 to December 2007.     

Compound real option valuation with phase-specific volatility: A multi-phase mobile payments case study

Multi-staged R&D projects are copy-book cases of compound real options. Traditional compound option models assume a constant volatility over the lifetime of the project. Building on the n-fold compound option model of Cassimon et al. (2004), we extend this model to allow for phase-specific volatility estimates, while preserving the closed-form solution of the model. We illustrate the extended model with a case study of a real option valuation of a multi-stage software application project by a large mobile phone operator and we show how project managers can estimate phase-specific volatilities.