Prescribed conditional interaction structure models with application to the analysis of mobility tables

The present paper considers some new models for the analysis of multidimensional contigency tables. Although the theoretical background used here appeared already in Haberman (1974), prescribed conditional interaction (PCIN) models were introduced by Rudas (1987) and their mathematical properties were worked out by Leimer and Rudas (1988). These models are defined by prescribing the values of certain conditional interactions in the contingency table. Conditional interaction is defined here as the logarithm of an appropriately defined conditional odds ratio. This conditional odds ratio is a conditional version of a generalization of the well known odds ratio of a 2×2 table and that of the three factor interaction term of a 2×2×2 table and applies to any number of dimensions and any number of categories of the variables. The well known log-linear (LL) models are special PCIN models. Estimated frequencies under PCIN models and tests of fit can be computed using existing statistical software (e.g. BMDP). The paper describes the class of PCIN models and compares it to the class of association models of Goodman (1981). As LL models are widely used in the analysis of social mobility tables, application of more general PCIN models is illustrated.     

哪种VoIP设备能迎合未来需求?

VoIP电话基础设施设备市场在快速增长并不断变化,在今后几年可能会有全新的设备投放市场。准确预测市场需要什么类型的设备是很难的,因为IP多媒体子系统(IMS)这个即将出台的体系结构标准将包含一些老设备类型,并导致全新设备类型的出现。位于美国加州Campbell的市场调查公司Infonetics Re- search的分析师Ste phane Te ral介绍说, IP多媒体子系统标准定义了3种功能:归属用户服务、会话呼叫控制功能和媒体资源功能。尽管所有大公司均计划实施IMS,但它们几乎没有交付什么设备。     

Why Don’t Most Merchants Use Price Discounts to Steer Consumer Payment Choice?

Recent legislation and court settlements in the United States allow merchants to use price discounts to steer customers to pay with means of payment that are less costly to merchants. We use transaction data to compute rough estimates of the expected net cost reduction by merchant type of giving debit card and cash price discounts. We find that steering consumers to debit and cash via simple price discounts reduces most merchants’ card processing cost; however, this reduction is small and may be insufficient to offset the increase in the cost of administering price menus that vary by payment instrument.     

Transplanting Social Capital to the Online World: Insights from Two Experimental Studies

The recent proliferation of computer networks has stimulated the emergence of thousands of online communities. Facebook, which has grown to 175-million users in five years and recently surpassed megasite MySpace to become the world's largest social networking site, is a classic example. As the importance of online communities continues to grow, a good understanding of their success factors for building and sustaining a community becomes crucial.

In this article, we apply social capital theories to examine the interactions among individuals and trust building at the initial development of an online community. Specifically, we postulate that offline social capital can be transplanted into an online community (small or large) to foster the development of trust and social norms that make a community thrive. We conduct two experimental studies: one in the context of real-world, small-scale online communities, and the other in the context of computer-simulated large-scale online communities. Results from these studies provide strong support for our proposition. We interpret these results and discuss their implications and contributions to theory and practice.     

Assessing financial market integration in Asia – Equity markets

Financial integration has strong implications for financial stability. On the one hand, financial integration among economies helps to improve their capacity to absorb shocks and foster development. On the other hand, intensified financial linkages in a world of increasing capital mobility may also harbour the risk of cross-border financial contagion. This paper provides a survey of high-frequency indicators to monitor the development of equity market integration in Asia. The results show that after slowing down between 2002 and 2006, the equity market integration process picked up again in 2007–08. Nevertheless, the process is not complete and the degrees of integration between mature and emerging equity markets are different. The divergence may be attributed to the difference in the political, economic and institutional aspects across jurisdictions in Asia.     

Differences in Roma and non-Roma students’ ratings of their peers’ popularity: an inquiry into the oppositional culture in Hungarian schools with the use of a survey experiment

Quality & Quantity - Oppositional culture theory posits that students who belong to oppressed ethnic minority groups define their ethnic identity in opposition to the majority of students....     

Doing more and doing better are two different entities: Different patterns of family control and environmental performance

Family firms bear two types of agency costs, including type I and type II agency problems, in corporate environmental practices: (1) Outside executives at family firms hesitate to engage in environmental strategies, which can lead to drops in profits; (2) Controlling families employ opportunistically environmental management to achieve their interests. We argue that a primary cause for the agency problems lies on ineffective internal corporate governance at family firms, which can cause loss of managerial (or power) balance between outside executives and family executives. Our findings show that family firms with ownership and strategic control (FSC), which family executives and outside executives monitor and constrain each other, can achieve the highest environmental performance. Moreover, external controls, including product market competition and provincial environmental regulations, substitute effective internal control of FSC. The environmental performance premium of FSC is more prevalent when the production market competition is lower. Family firms with ownership, operational, and strategic control (FOSC) can achieve higher environmental performance within a province with more stringent environmental regulations.     

Drivers of firm formalization in Vietnam: an attention theory explanation

Informal enterprises are widely viewed as a mechanism to engage unemployed people in the economy and thereby alleviate poverty in developing economies. However, over-representation in an economy may lead to both economic growth and broader employment opportunities being sacrificed. This paper presents a process model to investigate three potential drivers for firms to formalize: the first from a desire to grow and develop the firm through innovation, the second from the wish to access government financial support and the third stimulated by the payment of unofficial payments or bribes. We use data from surveys of Vietnamese firms in 2005, 2007, 2009 and 2011 to investigate these drivers of formalization. Although we find support for all three of these drivers, the results differ in significance across years and firm types. We explain these differences using attention theory to show how different situations and events can make the formalization decision more likely over time.     

Why do not you read the label? – an integrated framework of consumer label information search

This article facilitates deeper insight into label‐related consumer information acquisition behaviour. An integrated framework of label information search (LIS) has been developed based on a synthesis of related literature and explorative research conducted by analysing online discussions among customers (netnography). The framework focuses on three main groups of personal factors that serve as antecedents of LIS: general personal factors (e.g. health consciousness and socio‐demographics), label‐related personal factors (e.g. label‐related self‐efficacy, trust in labels and the perceived usefulness of labels) and product category‐related personal factors (trust in food products, enduring involvement, experience and perceived quality differences). Important characteristics of the framework are its process‐oriented nature and the dynamically changing relationships among its concepts. LIS is an antecedent to and a consequence of influencing factors. This article offers managerial implications and serves to incite future inquiry in this field.     

Internal governance mechanisms and firm performance in China

Corporate governance issues arising from concentrated ownership structure in emerging economies have received growing attention. Adopting a principal–principal perspective, this paper employs structural equation modeling to evaluate the independent and interdependent effects of internal governance mechanisms in enhancing firms’ value in China. Based on a 3-year dataset covering 304 publicly listed companies over 2003–2005, our findings suggest that ownership concentration has the most significant governance effect and has impacted negatively on firm performance. Furthermore, the governance role of the board of directors and supervisory boards is found to have been hindered by ownership concentration, rendering them unable to improve firm performance at present.