Variance swaps valuation under non-affine GARCH models and their diffusion limits

In this article, we investigate the pricing and convergence of general non-affine non-Gaussian GARCH-based discretely sampled variance swaps. Explicit solutions for fair strike prices under two different sampling schemes are derived using the extended Girsanov principle as the pricing kernel candidate. Following standard assumptions on time-varying GARCH parameters, we show that these quantities converge respectively to fair strikes of discretely and continuously sampled variance swaps that are constructed based on the weak diffusion limit of the underlying GARCH model. An empirical study which relies on a joint estimation using both historical returns and VIX data indicates that an asymmetric heavier tailed distribution is more appropriate for modelling the GARCH innovations. Finally, we provide several numerical exercises to support our theoretical convergence results in which we further investigate the effect of the quadratic variation approximation for the realized variance, as well as the impact of discrete versus continuous-time modelling of asset returns.     

Work-limiting health,earnings, and employment: an analysis with SIPP data

ABSTRACT

This study examines the role of work-limiting health conditions on employed people’s earnings, employment status, and working hours, and distinguishes between the different degree and severity of predictable shocks. Using data from the 2004 Survey of Income and Program Participation (SIPP), we evaluate the impact of any work-limiting health condition as well as a subset of health conditions that appear to arrive largely exogenously on post-onset earnings, employment, and working hours. We find that people who report being employed and later experience the onset of any work-limiting health condition tend to have lower subsequent earnings, a reduced probability of being employed, and fewer working hours per month compared to those who remain healthy. The adverse impact is even greater for people with health conditions that arrive less predictably. We use a difference-in-differences regression model with person and year fixed effects as the primary estimation method.     

Female Graduate Students’ Attitudes After Leadership Training

Although the increasing focus on female leadership in both the popular press and scholarly literature is relatively recent, women's leadership is not. Women have traditionally played a role in civic and cultural arenas and now have a greater opportunity to bring their particular leadership strengths to a broad range of organizations. The current paper reports on a case study about participants’ attitudes after participating in a leadership seminar series program for female graduate students at a university in the Northeast. The program's design incorporated networking, goal setting, skills training, and mentoring. Postprogram results (N = 17) on measures of Houghton and Neck's Revised Self‐Leadership Questionnaire indicated significant changes on all three of the leadership questionnaire's dimensions as well as on several subscales within the dimensions indicating that after the leadership training, the women were adapting to more transactional practices such as self‐reward and goal setting.     

The Commodification of Race in Singapore: The Customer Service Implications of the Other-Race Effect on Tourism and Retailing

This paper examines the phenomenon known as the other-race effect, which is the ability to recognize the faces of those of one race, easier than the faces of those from another race. Typically, the race that is easier to recognize is the individual's own race, and most previous research has focused on this type of comparison. This study, though, analyzes the ability of Chinese Singaporeans to recognize the faces of people of color versus White faces in a customer service context, and compares those results with the ability of White subjects in the United States to recognize the same faces. This approach is particularly applicable to the Asia Pacific region. Tourism accounts for a significant part of the regional economies, and marketers are becoming more sensitive to the changing needs of the multicultural marketplace where inter-racial interactions between customers and service providers in retailing and tourism are on the rise. Results of the research indicate evidence of the other-race effect. Asians who were more exposed to people of color than to Whites, recognized Black faces better than White faces. The results are interpreted based on the theoretical premise that people are better at recognizing faces of races for which there is a higher level of interaction, exposure, and familiarity.     

The virtue of participatory governance: a MacIntyrean alternative to shareholder maximization

We draw on Alasdair MacIntyre's virtues, practices, and institutions schema to argue that employee participation in governance practices can play an important role in developing virtue. Whereas MacIntyre's schema has been most widely employed to understand how productive practices can cultivate virtue, we focus instead on the way that meaningful deliberation about the common good can provide experiences requiring employees to exercise the virtues. We then apply this theoretical framework to an analysis of the Mondragon Cooperative Corporation. Our analysis emphasizes the importance of participatory governance over employee ownership. Based on this analysis, we draw several implications for increasing participatory governance in a way that will prevent shareholder maximization from crowding out virtue, even in corporate contexts where productive activity itself does not provide a meaningful, virtue-instilling experience.     

Overcoming the “recency trap” in customer relationship management

Purchase likelihood typically declines as the length of time since the customer’s previous purchase (“recency”) increases. As a result, firms face a “recency trap,” whereby recency increases for customers who do not purchase in a given period, making it even less likely they will purchase in the next period. Eventually the customer is effectively lost to the firm. We develop and illustrate a modeling approach to target a firm’s marketing efforts, keeping in mind the customer’s recency state. This requires an empirical model that predicts purchase likelihood as a function of recency and marketing, and a dynamic optimization that prescribes the most profitable way to target customers. In our application we find that customers’ purchase likelihoods as well as response to marketing depend on recency. These results are used to show that the targeting of email and direct mail should depend on the customer’s recency and that the optimal decision policy enables the average high recency customer, who currently is virtually worthless to the firm, to become profitable.     

Interest Tax Shields: A Barrier Options Approach

There is a link between barrier options and tax shields of interest expense. We combine this link with a traditional valuation approach, to present practical valuation formulas for interest tax shields in three debt scenarios with risk of default: (1) constant debt, (2) delayed debt, and (3) debt refinancing. In all cases, default and refinancing are contingent on the random evolution of the income of the firm. For each scenario, we work out sensitivity analysis of the value of tax shields with respect to income, growth, systematic and business risk, risk-free interest rate, interest coverage ratio covenant, and the firm??s refinancing strategy.