Product Introduction Strategies under Sequential Innovation for Durable Goods with Network Effects

When network effects are important and technology is rapidly improved, this study explores the relative optimality of five product introduction strategies of a durable goods manufacturer: (1) replacement, (2) skipping, (3) a delayed line, (4) shelving, and (5) line‐extension. Using a two‐period analytical model, we show how the type of compatibility—either full or backward compatibility—and the magnitude of the network effect influence the manufacturer's preference for the above strategies. Our analysis reveals that only the strategies (1)–(3) above can be optimal; and the optimal strategy varies with network strength. Further, the type of compatibility can dramatically change the profitability under each optimal strategy; for instance, while backward compatibility can increase the profitability of replacement under certain conditions, it always reduces the profitability of a delayed line. We also illustrate that if compatibility were a choice, although backward compatibility may be observed widely in practice, the parametric region for its optimality is relatively more restricted than that of full compatibility.     

A Tighter Extra-Resource Analysis of Online Deadline Scheduling

This paper is concerned with online algorithms for scheduling jobs with deadlines on a single processor. It has been known for long that unless the system is underloaded, no online scheduling algorithm can be 1-competitive, i.e., matching the performance of the optimal offline algorithm. Nevertheless, recent work has revealed that some online algorithms using a moderately faster processor (or extra processors) can guarantee very competitive performance Kalyanasundaram and Pruhs, 2000 or even be 1-competitive Koo et al., 2002; Lam and To, 2001. This paper takes a further step to investigate online scheduling algorithms with an even higher performance guarantee (i.e., better than 1-competitive algorithms) and in particular, presents an extra-resource analysis of the earliest-deadline-first strategy (EDF) with respect to such a higher performance guarantee.A preliminary version of this paper has been accepted by The Australian Theory Symposium on Computing, 2004.This research was supported in part by Hong Kong RGC Grant HKU-7024/01E.     

Investigating the differential mobility experiences of Chinese cross-border students

Recent migration studies have adopted the lens of mobility to examine the stratifying effects of border policies, but few investigate the differential mobility of migrant families and children. This paper aims to contribute to the migration literature by considering the interplay between border policies, family configurations, and differential mobility. We apply the lens of differential mobility to the experiences of Chinese cross-border pupils – young child migrants with Hong Kong permanent residency who reside in Shenzhen, China, and cross the border to attend school. We begin by describing shifts in Hong Kong’s border and immigration policies since 1997, which have created a typology of families differentiated by mixed status, citizenship rights, and mobility. We then turn to four case studies of students with unequal border-crossing experiences to elucidate how border control constrains or promotes family mobility and perpetuates inequalities.     

China: developmentalism and social security

China began its social security reform when the market-oriented economy was first promoted in the late 1970s. Initiatives have been taken to replace the employer-based labour insurance model with a largely social insurance model. However, it is a mistake to argue that China is pursuing a neo-liberal agenda in its social initiatives. Instead, the state has played a major role in the process. Based on a developmental analysis, it is argued that the direction of change is generally encouraging. The emerging social insurance programme has the following advantages: it widens coverage, facilitates economic development, seeks a minimum entitlement, fosters social integration, and enhances individual participation and responsibility. The creation of an economically and socially viable social insurance programme will support the economic development of the country in the twenty-first century.     

Filtered Life Satisfaction and Its Socioeconomic Determinants in Hong Kong

Filtering the measure of life satisfaction through the bias of social desirability and response styles would furnish an adequate analysis of socioeconomic impacts on the filtered life satisfaction. The filtering is necessary because social desirability and the response styles of acquiescence, extremity, and centrality are likely to contaminate the measure of life satisfaction. Based on survey data from 1,993 Hong Kong Chinese adults, the study applied the filtering on the Personal Wellbeing Index to obtain filtered life satisfaction. Results indicated the bias of social desirability and response styles to justify the filtering. They further manifested that socioeconomic impacts on filtered life satisfaction were somewhat different from those on unfiltered life satisfaction. Some of the impacts on unfiltered life satisfaction were attributable to the contamination of life satisfaction by social desirability. Eventually, family income per capita appeared to contribute to filtered life satisfaction; and education and receiving public benefits tended to diminish the satisfaction. The results imply that while the availability of resources explains some of the findings, it does not provide the only or dominant explanation.     

Quality of Life in Older Adults: Benefits from Caring Services in Hong Kong

Many older adults are in need of care. Therefore, older people would generally benefit from the use of caring services, notably including home care, residential care, nursing, and medical services. The contributory factors underlying caring services tend to be a caring perspective that aspires to sustain older peoples social relationships and real-life involvement. To gauge the benefits from various social and health services, the present study relies on a large-scale survey of 3000 older adults in Hong Kong, using quality of life as a criterion. Results showed that an older adult who had used (ordinary or enhanced) home care services for a longer time turned out to have appreciably more improvement in quality of life. Besides, those who joined an interest group more frequently were higher in quality of life, including the health domain. On the other hand, frequent use of medical and meal-to-home services were signals that reflected problems detrimental to the older users quality of life. Despite this, the quality of clinics or hospitals, as perceived by the older adult, was the most beneficial. As such, caring services that foster older adults interests, cater to their health care needs, and embody quality can have principal contribution to their users quality of life.     

博彩业监管政策的比较分析

美式赌场和欧式赌场的经营风格截然不同,无论是经营理念还是日常管理都存在较为明显的差异。美式赌场重视宣传,追求经济规模;欧式赌场的管制则严格得多,规模也很小。本文首先对欧美赌场的经营模式进行比较分析,进而深入讨论了监管政策对赌场经营模式的影响,同时还总结了世界各大赌城监管政策的类型。根据澳门博彩业的发展趋势,本文也提出了完善澳门博彩业监管政策的建议。     

Access to social protection among people with disabilities: Evidence from Viet Nam

Although people with disabilities are frequently targeted as key beneficiaries of social protection, little is known on their access to existing programmes. This study uses mixed methods to explore participation in disability‐targeted and non‐targeted social protection programmes in Viet Nam, particularly in the district of Cam Le. In this district, social assistance and health insurance coverage among people with disabilities was 53 per cent and 96 per cent respectively. However, few accessed employment‐linked social insurance and other disability‐targeted benefits (e.g. vocational training, transportation discounts). Factors affecting access included the accessibility of the application process, disability assessment procedures, awareness and the perceived utility of programmes, and attitudes on disability and social protection.