ASYMPTOTICS OF IMPLIED VOLATILITY IN LOCAL VOLATILITY MODELS

Using an expansion of the transition density function of a one‐dimensional time inhomogeneous diffusion, we obtain the first‐ and second‐order terms in the short time asymptotics of European call option prices. The method described can be generalized to any order. We then use these option prices approximations to calculate the first‐ and second‐order deviation of the implied volatility from its leading value and obtain approximations which we numerically demonstrate to be highly accurate.     

The relationship between cultural values and learning preference: the impact of acculturation experiences upon East Asians

Globalization and technology advancement are creating more biculturalism at workplaces and learning settings. However, little is known about acculturation experience and its influence on a person's cultural values and learning preference. The research reported in this study investigates the impact of acculturation experiences upon the relationship between cultural values and learning preference of 292 Far East Asians (from Confucian‐influenced societies) and Asian Americans. Different preferences for learning methods and different levels of traditional cultural values were found between these two groups of adult learners. Acculturation experience was identified as the influential factor for the differences. However, they all still retain their traditional cultural values in various degrees regardless of the length of time the individual had been exposed to the acculturation experience. The impact of cultural values on an adult's learning preference is an area of concern in cross‐cultural training and development.     

Comment on “A new simple square root option pricing model”

Câmara A. and Wang Y.‐H. ( 2010 ) introduce a simple square root option pricing model where the square root of the stock price is governed by a normal distribution. They show that their three‐parameter option pricing model can outperform the Black–Scholes option pricing model. We demonstrate that their assumption possesses an internal inconsistency in that the square root of the stock price can take on negative values. We generalize and revise their assumption so that the internal inconsistency can be avoided, and introduce a new square root option pricing model. The difference in option prices calculated from the two models may not be trivial. © 2011 Wiley Periodicals, Inc. Jrl Fut Mark     

Adjustment Mechanisms in a Currency Area

Both the euro-area and the United States suffered an initially quite similar housing and financial shock in 2007/8, with several states in both regions being particularly badly affected. Yet there was never any question that the worst hit US states would need a special bail-out or leave the dollar area, whereas such concerns have worsened in the euro-area. We focus on three badly affected states, Arizona, Spain and Latvia, to examine the working of relative adjustment mechanisms within the currency region. We concentrate on four such mechanisms, relative wage adjustment, migration, net fiscal flows and bank flows. Only in Latvia was there any relative wage adjustment. Intra-EU migration has increased, but is more costly for those involved in the EU (than in the USA). Net federal financing helped Arizona and Latvia in the crisis, but not Spain. The locally focussed structure of banking amplified the crisis in Spain, whereas the role of out-of-state banks eased adjustment in Arizona and Latvia. The latter reinforces the case for an EU banking union.     

Consumer workers as immaterial labour in the converging media markets: three value‐creation practices

This paper takes a practice‐based approach to consumer studies and focuses on the strategic and productive roles that consumers play as immaterial labour or consumer workers in the converging media markets. Based on a case study of a print media organization and its customers, the aim is to discuss the collaborative practices through which value is created in the market. By means of a textual analysis of online and interview data, three value‐creation practices are abstracted and illustrated: constructing a sense of belonging and collective identity, mutual helping and peer support, and building pride and self‐respect. Overall, the paper suggests that in global media environments, consumer‐customers are playing increasingly significant strategic roles in the practices and processes through which value is co‐created in the market. It is therefore concluded that the idea of consumers, and media audiences in particular, as recipients of communication and targets of marketing activities needs to be problematized and the dynamic strategic roles that consumers currently play in the market need to be acknowledged and actively incorporated into the business praxis of media corporations.     

Can Banks Self‐Regulate? Voluntary Agreements,Intrinsic Motivation and Games

This article argues that lessons on how to achieve a sustainable financial system can be learnt from the work done on sustainable commons (on common‐pool resources – CPRs – where there is no ‘tragedy of the commons’). Existing approaches to financial regulation may not give proper attention to available solutions. The article proposes that innovative solutions could be tested using experimental methods commonly used in CPRs: repeat run, feedback driven games.