Some new aspects of taxicab correspondence analysis

Correspondence analysis (CA) and nonsymmetric correspondence analysis are based on generalized singular value decomposition, and, in general, they are not equivalent. Taxicab correspondence analysis (TCA) is a \(\hbox {L}_{1}\) variant of CA, and it is based on the generalized taxicab singular value decomposition (GTSVD). Our aim is to study the taxicab variant of nonsymmetric correspondence analysis. We find that for diagonal metric matrices GTSVDs of a given data set are equivalent; from which we deduce the equivalence of TCA and taxicab nonsymmetric correspondence analysis. We also attempt to show that TCA stays as close as possible to the original correspondence matrix without calculating a dissimilarity (or similarity) measure between rows or columns. Further, we discuss some new geometric and distance aspects of TCA.     

Local Linear Kernel Regression with Long-Range Dependent Errors

This paper considers the use of a local linear kernel regression method to test whether the mean function of a sequence of long-range dependent processes has discontinuities or change-points. It proposes a non-parametric estimation procedure and then establishes an asymptotic theory for the estimation procedure. Examples, simulated and real, illustrate the estimation procedure.     

Beyond hookup culture: Current trends in the study of college student sex and where to next

A prominent body of sexuality research on college‐enrolled students in the twenty‐first century focuses on “hookup” culture, marked by the prevalence of sexual encounters between students with no expectation for a relationship to develop. This article will review and respond to current themes in the literature on hookup culture on college campuses. I argue that this literature privileges the White, middle‐class heterosexual experience, although less is known about how students who cannot or choose not to participate in this culture experience sexual relationships on college campuses. I place studies of hookup culture in conversation with those attentive to the effects of race, class, gender, and sexuality on access to, and experience of, hookup culture. I conclude with suggestions for future research, to include a renewed interest in sexual relationships forged outside of hookup cultures.     

Measuring Community Economic Resilience in Australia: Estimates of Recent Levels and Trends

We measure changes in community economic resilience (CER) across geo-locations in Australia between 2006 and 2011, a time span characterised by major natural and economic shocks. We build an index of potential CER that captures communities’ stocks of human, social, natural, physical and financial capitals, levels of economic diversity and accessibility to service centres. Using Census data and the ARIA index, we resort to principal component analysis to generate CER indexes at statistical area level 1, which is our community proxy. Our analysis of index values provides a number of useful insights. First, there was a statistically significant improvement over time in the overall CER index in all states and regions. Second, our CER measures improved at a different pace across regions and states while their rank remained mostly unchanged. Third, CER improved over time in social and physical capital and accessibility terms, but declined in human, natural, financial capital and diversity terms. Fourth, communities with a high economic diversity level reported higher capital stock except for natural capital, and communities with a low accessibility level had lower capital stock except for social and natural capital. Finally, CER has a long-term positive association with household income.     

Asian Family Firms through Corporate Governance and Institutions: A Systematic Review of the Literature and Agenda for Future Research

Although the corporate governance model of Asian family firms has recently gained increased attention, it remains unclear how these firms’ corporate governance mechanisms (and their effectiveness) differ from those of family firms in the western world. Drawing upon a comparative institutional perspective, this paper systematically reviews 148 published articles in peer‐reviewed journals from 1980 to 2015. The aim of this paper is to contribute to the understanding of institutional complementarities that constitute informal governance mechanisms adopted by Asian family firms by considering a wider set of institutional factors (i.e. political environment, cultural values and social norms) embedded in the Asian context. The main findings suggest that: (i) given the lack of market‐supporting institutions and the presence of strong political control over Asian economies, family firms tend to cultivate political connections to respond to the failure of legal systems; (ii) Asian family firms still rely heavily on personal networks (e.g. guanxi) to reduce uncertainty, strengthen business ties, and gain access to external resources; and (iii) cultural values and social norms (e.g. ‘face’ saving, reputational concerns and adult child adoption) lead to functionally equivalent corporate governance mechanisms in Asian family firms. The downstream effects of such mechanisms are also discussed, and future research avenues are identified.     

Leadership theory and research in the new millennium: Current theoretical trends and changing perspectives

Scholarly research on the topic of leadership has witnessed a dramatic increase over the last decade, resulting in the development of diverse leadership theories. To take stock of established and developing theories since the beginning of the new millennium, we conducted an extensive qualitative review of leadership theory across 10 top-tier academic publishing outlets that included The Leadership Quarterly, Administrative Science Quarterly, American Psychologist, Journal of Management, Academy of Management Journal, Academy of Management Review, Journal of Applied Psychology, Organizational Behavior and Human Decision Processes, Organizational Science, and Personnel Psychology. We then combined two existing frameworks (Gardner, Lowe, Moss, Mahoney, & Cogliser, 2010; Lord & Dinh, 2012) to provide a process-oriented framework that emphasizes both forms of emergence and levels of analysis as a means to integrate diverse leadership theories. We then describe the implications of the findings for future leadership research and theory.     

Measurement and Determinants of Quality of Life of Older Adults in Ho Chi Minh City,Vietnam

Social Indicators Research - This study represents the first study using Vietnamese data that is based on the World Health Organization’s quality of life instrument—the older adults...     

Estimation of causal continuous‐time autoregressive moving average random fields

We estimate model parameters of Lévy‐driven causal continuous‐time autoregressive moving average random fields by fitting the empirical variogram to the theoretical counterpart using a weighted least squares (WLS) approach. Subsequent to deriving asymptotic results for the variogram estimator, we show strong consistency and asymptotic normality of the parameter estimator. Furthermore, we conduct a simulation study to assess the quality of the WLS estimator for finite samples. For the simulation, we utilize numerical approximation schemes based on truncation and discretization of stochastic integrals and we analyze the associated simulation errors in detail. Finally, we apply our results to real data of the cosmic microwave background.     

Information loss in a noisy dichotomous sampling process

In binomial sampling, errors committed during inspection lead to a non-Bernoulli likelihood function, which has as effect a reduction in the effective size of the chosen sample. In this article, this form of information loss is studied under various hypotheses, including the bayesian approach.     

Kernel estimation in transect sampiing withoyt the shoulder condition

We consider the estiinution of wildlife population density based on line transect data. Nonparametric kernel method is employed, without the usual assumption that the detection curve has a shoulder at distance zero, with the help of a special class of kernels called boundary kernels. Asymptotic distribution results are included. It is pointed out that the boundery kernel of Zhang and Karunamuni (1998) (see also Müller and Wang (1994)) performs better (for asmyptotic mean square error consideration) than that of the boundary kernel of M¨ller (1991). But both of these kernels are clearly superior to the half-nonnal and one-sided Epanechnikov kernel when the shoulder condition fails to hold. In practice, however, for small to moderate sample sizes, caution should be exercised in using bounrlary kernels in that the density estimate might become negative. A Monte Carlo study is also presented, comparing the performance of four kernels applied to detection data, with and without the shoulder condition, Two bundary kernels for deriatives are also included for the point transect case.