地佐辛预防人流手术子宫颈扩张所致体动反应的临床观察

目的 观察地佐辛复合丙泊酚麻醉对人流手术中宫颈扩张操作所致体动反应的抑制效果.方法 选取全麻人流手术需术中进行宫颈扩张的患者40例,随机分成两组.所有患者均使用丙泊酚3mg/kg进行静脉全麻.术中进行扩张宫颈操作前两组无加任何处理.两组患者于扩张宫颈操作期间如发生体动反应,则暂停手术,观察组加用地佐辛0.1 mg/kg,对照组追加丙泊酚1mg/kg后再重新开始操作.术后统计两组患者扩张宫颈操作时发生体动反应的例数.结果 观察组出现体动反应患者4例,对照组5例,追加地佐辛和丙泊酚均能有效抑制体动反应的发生;但观察组的丙泊酚用量、辅助呼吸时间及停药至清醒时间明显低于对照组,两组间比较有显著性差异（P＜0.05）.结论 地佐辛复合丙泊酚麻醉能有效减少人流手术中宫颈扩张操作所致体动反应的发生例数,效果更优于单独使用丙泊酚.     

Chinese Research on World Heritage Tourism

This paper reviews and assesses the Chinese academic literature on World Heritage Sites. Management structure, lack of financial resources, impacts on the World Heritage Sites and heritage education are themes that are commonly addressed. Research opportunities are identified. In particular, the need for more detailed case studies on a greater variety of sites is required. Such studies should be informed by clear concepts and appropriate theoretical frameworks if knowledge is to be cumulative and lead to the enhanced management of World Heritage Sites.     

Tour Leaders' Impression Management and Job Performance: Exploring the Moderating Role of Tourists' Self-Monitoring

A tour leader (TL) is a first-line service provider whose performance shapes a tourist's experience and satisfaction during a journey. We examine the moderating effects of the self-monitoring level of group package tour members on the relationship between the use of impression management (IM) tactics by TLs and tourists' subsequent job performance ratings (PRs) of a TL. Data from 485 responses of tourists from 59 outbound tour groups in Taiwan revealed that TLs' use of positive IM tactics – that is, ingratiation, self-promotion, and exemplification – is positively related to tourists' PRs. In contrast, their use of non-positive IM tactics – that is, supplication and intimidation – is negatively related to tourists' PRs. Furthermore, tourists' self-monitoring appears to weaken the effects of supplication and intimidation on their PRs. We also found that tourists' level of self-monitoring is a stronger moderator when TLs use supplication than when they use other tactics.     

Hotel Employees' Perception of the Statutory Minimum Wage Policy in Hong Kong

Employee compensation is one of the largest expenses for businesses. Given the labor-intensive nature of the hotel industry, hotel employees' perceptions of the statutory minimum wage (SMW) policy have become a major concern for hotel operators since the introduction of the policy in Hong Kong. This exploratory study examines these perceptions, together with hotel employees' job and compensation satisfaction and intention to leave, since the introduction of the SMW policy. A survey of 161 hotel employees in Hong Kong was carried out. Respondents demonstrated high awareness of the SMW policy but viewed its effect on the hotel industry as limited. The largest gap between the perceived importance of, and satisfaction with, a factor related to job satisfaction was found for the benefits package. As well as making a contribution to the academic literature, this study provides practical implications of the SMW policy for the hotel industry in Hong Kong and other countries considering adopting a similar measure.     

Consulting knowledge and organisation's absorptive capacity: A communication chain perspective

This study investigates the communication chain of consulting knowledge constituted by consultants and internal lecturers. We analyse the differences between consultants and internal lecturers in their capability of knowledge training and discuss its influence on organisations' absorption of consulting knowledge. Based on a Mann–Whitney U test of data from 47 quality management consultants and 235 internal lecturers in Taiwan, we found that internal lecturers significantly exhibited weaker capability than consultants, especially in knowledge structure, knowledge transformation, trainee orientation and training ethics. The capability gap was disadvantageous for organisations to absorb consulting knowledge and suggestions for improving this problem were provided finally.     

A censored system of cigarette and alcohol consumption

Many previous studies of US cigarette and alcohol consumption have focused on single equations. However, the addictive nature of consumption suggests that it is more appropriate to model these products as a system. We propose a two-step estimation procedure and apply the procedure to a system of equations for cigarette, beer and wine consumption. Results differ from those derived from an existing two-step procedure. Findings suggest that consumption of cigarettes, beer and wine is responsive to income changes but the elasticities are rather small. Personal physiques, education, age, race, ethnicity, health, gender, employment status, and regions also play significant roles in consumption.     

Household demand for fats and oils: two-step estimation of a censored demand system

A censored system of household fat and oil demand equations is estimated with a two-step procedure, using cross-sectional data from the 1987–1988 US Nationwide Food Consumption Survey. Own price and total expenditure elasticities are close to unity and there is no evidence of gross substitutability. Compensated elasticities suggest net substitution among the products considered.     

Does PPP hold in African countries? Further evidence based on a highly dynamic non-linear (logistic) unit root test

With a view to investigating whether the purchasing power parity (PPP) theory holds true for selected African countries during the January 1980–December 2003 period, we employ a rigorous, highly dynamic non-linear (logistic) unit root test, as first advanced by Leybourne et al. (1998 Leybourne, S, Newbold, P and Vougas, D. 1998. Unit roots and smooth transitions. Journal of Time Series Analysis, 19: 83–97. [Crossref] , [Google Scholar]), which is considerably more powerful than those tests traditionally used. Compared with the rejection of the null of the unit root process for only one of the 22 countries under study when we use the traditional ADF, PP, KPSS, NP and the DF-GLS unit root tests, with the Leybourne et al. (1998 Leybourne, S, Newbold, P and Vougas, D. 1998. Unit roots and smooth transitions. Journal of Time Series Analysis, 19: 83–97. [Crossref] , [Google Scholar]) test, we strongly reject the null of the unit root process for a surprising six of the 22 countries. These empirical results clearly indicate that PPP holds true for these six countries, namely the Central African Republic, the Côte d’Ivoire, Kenya, Madagascar, Uganda and Lesotho.     

Towards solving the PPP puzzle: evidence from 113 countries

Several different approaches have been followed by researchers to test the validity of Purchasing Power Parity (PPP). Since the introduction of the unit-root tests, researchers have applied a battery of these tests to determine whether the real exchange rates are stationary. If the answer is in the affirmative, PPP is validated. While application of the standard augmented Dickey–Fuller test has not provided much support for PPP, a test that incorporates nonlinearity in the rates has. Under both tests, however, the null of nonstationary is tested against the alternative of stationarity. In this article, when we switch the null with the alternative and apply Kwiatkowski et al. (1992 Kwiatkowski, D, Phillips, PCB, Schmidt, P and Shin, Y. 1992. Testing the null hypothesis of stationarity against the alternative of a unit root. Journal of Econometrics, 54: 159–78. [Crossref], [Web of Science ®] , [Google Scholar]) test, we provide relatively more support for the theory, getting closer and closer towards solving the PPP puzzle.