Rallying competencies in virtual communities: A study of core processes and user interest in open source software projects

Managing work practices has become one of the key challenges facing virtual communities. This paper seeks to broaden the research on virtual communities by applying the theory of competency rallying (TCR) in a longitudinal manner to examine the impact of task identification, task assignment, task execution and task management on user interest in open source software (OSS) projects defined by popularity and communication. The aim of this paper is: (1) re-conceptualizing the concept of user interest and broadening our understanding of user interest by incorporating users' post-usage behaviors, (2) examining the effect of various tasks involved in an OSS project's key processes of defect-fixing and feature-enhancement on user interest. The current study found that project popularity is positively influenced by task assignment, task execution and task management. Additionally, user communication was found to be positively impacted by task identification and task execution. The data collected from 1178 OSS projects in a longitudinal manner (at 3 time points over a period of 16 months) confirmed the expectations from TCR and also demonstrated that over time the effects that development of competencies and managing short term cooperative work have on project success might increase, while the impact of identifying market needs and marshalling competencies may not significantly change.     

Evaluating a non-linear asset pricing model on international data

The paper analyses the ability of a non-linear asset pricing model suggested by Dittmar [Dittmar, R.F., 2002. Non-linear pricing kernels, kurtosis preference, and the cross-section of equity returns. Journal of Finance 57, 369-403] to explain the returns on international value and growth portfolios. For comparison we use competing pricing models such as the ICAPM, the exchange rate risk augmented ICAPM and the international two-factor model proposed by Fama and French [Fama, E.F., French, K. R., 1998. Value versus growth: The international evidence. Journal of Finance 53, 1975-1999]. All models are evaluated both unconditionally and conditionally. The models are evaluated by applying the Hansen and Jagannathan distance measure, and we also employ several alternative measures to ensure a robust comparison of the models. We find support for the model of Dittmar [Dittmar, R.F., 2002. Non-linear pricing kernels, kurtosis preference, and the cross-section of equity returns. Journal of Finance 57, 369-403]. Evaluated conditionally, this model successfully passes all the different diagnostic tests performed in the analysis.     

Conditional Properties of Hedge Funds: Evidence from Daily Returns*

Using daily returns on a set of hedge fund indices, we study (i) the properties of the indices' conditional density functions and (ii) the presence of asymmetries in conditional correlations between hedge fund indices and other investments and between hedge fund indices themselves. We use the SNP approach to obtain estimates of conditional densities of hedge fund returns and then proceed to examine their properties. In general, a nonparametric GARCH(1,1) model appears to provide the best fit for all strategies. We find that the conditional third and fourth moments are significantly affected by changes in the current volatility of returns on hedge fund indices. We examine changes in the conditional probability of tail events and report significant changes in the probability of extreme events when the conditioning information changes. These results have important implications for models of hedge fund risk that rely on probability of tail events. We formally test for the presence of asymmetries in conditional correlations to determine if there is contagion between hedge funds and other investments and between various hedge fund indices in extreme down markets versus extreme up markets. We generally do not find strong evidence in support of asymmetric correlations.     

Impact of airport green atmospherics on mental health value,image, and loyalty among visitors and workers

Nature‐based solutions (NBS) are becoming increasingly crucial as NBS brings diverse health‐related benefits to travelers and workers in the tourism business sector. This research explored the influence of green atmospherics as NBS on airport occupants' mental health value, image, and loyalty generation processes. A quantitative approach with a field survey method was employed. A structural equation modeling and metric invariance test were used as data analysis technique. Our empirical result revealed that green atmospherics as NBS significantly improve the occupants' mental health value and image of the airport, and these variables contribute to their loyalty enhancement for the airport. The effect of green spaces and natural surroundings on loyalty was maximized through mental health value and image. In addition, the linkages from natural surroundings to mental health value and image were stronger in the visitor group whereas the mental health value—loyalty relation was stronger in the worker group.     

Decisive factors in medical tourism destination choice: A case study of Isfahan,Iran and fertility treatments

The birth of the first in vitro fertilized baby, followed by further advances in the field of assisted reproductive technology (ART) has made this technology one of the most attractive tourism innovations among the different categories of medical tourism. In addition, factors such as legal, moral, religious and ethical issues play important roles in choosing reproductive tourism destinations. The aim of this study was to examine the factors influencing destination choice in infertile couples who referred to the Isfahan Fertility and Infertility Center in Isfahan, Iran. Field evaluation was carried out based on a documentary survey and questionnaire completed by interviewers. Among a target group of 80 infertile couples, 67 were interviewed. The majority of participants in this study were Muslim couples who traveled for reproductive tourism to Iran. It can be concluded that religious affinity may have paramount importance in reproductive medical tourism for Muslim infertile couples.     

Money Pools in the Americas: The African Diaspora’s Legacy in the Social Economy

Money pools are ancient African traditions that speak to the functionality of getting things done by a historically oppressed group of people. The analysis for this study is based on 583 interviews in five Caribbean countries: Haiti, Grenada, Jamaica, Trinidad and Tobago, and Guyana. African traditions of collectives reveal that Black people have long had money pools that focused on helping people thrive in commerce, including during the hard times of slavery and colonization. This research argues that throughout the Caribbean indigenous banking systems—with localized names such as susu, partner, meeting-turn, box-hand and sol—are long-standing ancient traditions that historically and currently are taking a bold stand against exclusionary financial systems. African-Caribbean people have an important legacy on the social economy through money pools. The ways in which persons of African descent organize in the social economy is vital to unravelling the market fundamentalist view that there is only a singular way to do business in society.     

Risk contagion among international stock markets

We develop a stochastic volatility model with jumps in returns and volatility to analyze the risk spillover from the U.S. market and the regional market to a number of European countries’ equity markets. The key advantage of this approach compared to the earlier approaches is that it enables us to identify jumps and investigate spillover of extreme events across borders. We find that a large part of the jumps in the local markets are due to the U.S. market and the regional market. The U.S. contribution to the variances is in general below the contribution from the regional market. In general, we observe an increasing integration during the last two decades, which, to some extent, can be related to the advancement of the European Union. Furthermore, we show that the identification of the jumps can be used as a useful signal for portfolio reallocation.     

“Big Man” politics in the social economy: a case study of microfinance in Kingston,Jamaica

Microfinance and its “reinvention as bankers-for-the-poor” to create financial inclusion has not been effective everywhere. The literature seems to suggest that the social economy and microfinance help marginalized business people; yet no one considers that political bias interferes with the social economy, making it hard for it to be just. The promise of micro-credit was to achieve a double bottom line: first, the financial sustainability of the lending institution itself, and second, the social benefit of providing loans to low-income business people. Yet, alternative pitches of a social economy to “help people” fail to analyze the embedded power dynamics within the social economy. In this case study in downtown Kingston, Jamaica, 233 small-business people who depend on development finance because of social exclusion now find that these targeted programs are intertwined in partisan, sometimes dangerous, politics. As a result, oppressed people opt out of micro-banking programs to resist “Big Man” politics – the politicians or gangsters attempting to control them. In this study of 307 interviews, I analyze the informal politics of Dons and politicians who misuse micro-credit for their own ends. I find that the coupling of class biases and clientelist practices in the social economy discourages eligible business people from taking micro-loans, and argue that the microfinance industry needs to pay close attention to this issue if it is to continue to help marginalized business people.     

Tourism climate insurance: implications and prospects

This paper investigates the intentions of tourists to purchase climate insurance as part of their holiday packages. A research model, based on Bagozzi’s reformulation of attitude theory designed to examine the relationships between climate expectation-disconfirmation and the behavioral intentions of tourists in purchasing tourism climate insurance, with destination loyalty as an outcome. The model hypothesizes and tests whether expectation-disconfirmation can be resolved by insuring the product-climate. A structural equation modeling is utilized. The results reveal that the expectation-disconfirmation of tourists in relation to climate is positively associated with their intentions to purchase insurance and negatively affects loyalty.