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Transformation Approaches For The Construction Of Weibull Prediction Interval, Zhenlin Yang, Stanley P. See, Min Xie Jul 2003

Transformation Approaches For The Construction Of Weibull Prediction Interval, Zhenlin Yang, Stanley P. See, Min Xie

Research Collection School Of Economics

Two methods of transforming the Weibull data to near normality, namely the Box-Cox method and Kullback-Leibler (KL) information method, are discussed and contrasted. A simple prediction interval (PI) based on the better KL information method is proposed. The asymptotic property of this interval is established. Its small sample behavior is investigated using Monte Carlo simulation. Simulation results show that this simple interval is close to the existing complicated PI where the percentage points of the reference distribution have to be either simulated or approximated.

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Maturity Effect On Bid-Ask Spreads Of Otc Currency Options, Beng Soon Chong, David K. Ding, Kok Hui Tan Jul 2003

Maturity Effect On Bid-Ask Spreads Of Otc Currency Options, Beng Soon Chong, David K. Ding, Kok Hui Tan

Research Collection Lee Kong Chian School Of Business

The paper ascertains the relation between bid-ask spreads and the contract maturity of OTC currency options. Contrary to previous findings in the futures market, spreads of currency options are found to be negatively related to the contract's term-to-maturity. The negative relation persists even after controlling for the effects of price risks, competition, and trading activity. The pronounced differences in the term-to-maturity results are attributable to the market risk effect and differences in the market structure of options and futures markets.

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Video Clip Retrieval By Maximal Matching And Optimal Matching In Graph Theory, Yu-Xin Peng, Chong-Wah Ngo, Qing-Jie Dong, Zong-Ming Guo, Jian-Guo Xiao Jul 2003

Video Clip Retrieval By Maximal Matching And Optimal Matching In Graph Theory, Yu-Xin Peng, Chong-Wah Ngo, Qing-Jie Dong, Zong-Ming Guo, Jian-Guo Xiao

Research Collection School Of Computing and Information Systems

In this paper, a novel approach for automatic matching, ranking and retrieval of video clips is proposed. Motivated by the maximal and optimal matching theories in graph analysis, a new similarity measure of video clips is defined based on the representation and modeling of bipartite graph. Four different factors: visual similarity, granularity, interference and temporal order of shots are taken into consideration for similarity ranking. These factors are progressively analyzed in the proposed approach. Maximal matching utilizes the granularity factor to efficiently filter false matches, while optimal matching takes into account the visual, granularity and interference factors for similarity measure. …

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People, Politics, Policy: The (Im)Possibilities Of Institutional Collaborations, Lily Kong Jul 2003

People, Politics, Policy: The (Im)Possibilities Of Institutional Collaborations, Lily Kong

Research Collection School of Social Sciences

The university is among the oldest and most durable institutions in the world, surviving over 900 years. Until relatively recently, universities were small institutions, catering to slight proportions of the general population. They were elite institutions. Educating these small groups was the remit of universities. However, the reach, roles, and expectations of universities have changed especially in the last century and a half. While still catering to a select group, the proportions of many societies which have access to university education have grown. Further, whereas education was previously the sole function of universities, research expectations appeared about 150 years ago. …

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Omission Bias In Vaccination Decision: Where's The "Omission"? Where's The "Bias"?, Terry Connolly, Jochen Reb Jul 2003

Omission Bias In Vaccination Decision: Where's The "Omission"? Where's The "Bias"?, Terry Connolly, Jochen Reb

Research Collection Lee Kong Chian School Of Business

Several studies have reported that parents are often reluctant to vaccinate their own or other people's children, even when the balance of health risks and benefits clearly favors vaccination. This reluctance has been interpreted as a manifestation of omission bias, a general tendency to prefer inactive to active options even when inaction leads to worse outcomes or greater risks. The research raises significant public health concerns as well as worries about human decision biases in general. In this paper we argue that existing research on vaccination decisions has not convincingly demonstrated any general reluctance to vaccinate nor has it made …

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Once A Director, Always A Fiduciary?, Pearlie Koh Jul 2003

Once A Director, Always A Fiduciary?, Pearlie Koh

Research Collection Yong Pung How School Of Law

The corporate director is subject to duties of good faith and loyalty. As he stands in a fiduciary position vis-a-vis the company on whose board he sits, he is subject to strict obligations of self-denial. Indeed, ensuring adherence to an absolute rule in this regard is justified by the need to control, albeit in a necessarily imperfect and arguably ineffective manner, the exercise of discretion by the director who stands in an undoubted position of power with respect to the company. A director therefore is obliged to avoid a conflict of interests and is prohibited from profiting from his office. …

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What Would You Do - With A Taniwha At The Table?, Ian Macduff Jul 2003

What Would You Do - With A Taniwha At The Table?, Ian Macduff

Research Collection Yong Pung How School Of Law

In New Zealand, a complicating factor in some disputes may involve the presence (whether one believes it or not) of a taniwha, or spirit, as a major part of the negotiations. What advice would you have for mediators who face such significant cross-cultural, identity-based issues? The author hopes readers of this journal will be able to provide some insighful advice.

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Transborder Industrialization And Singapore's 'Clones' In Indonesia, China And Vietnam: A Strategy Reconsidered, Caroline Yeoh, Chee Sin Koh, Julian Ching Wei Wee Jul 2003

Transborder Industrialization And Singapore's 'Clones' In Indonesia, China And Vietnam: A Strategy Reconsidered, Caroline Yeoh, Chee Sin Koh, Julian Ching Wei Wee

Research Collection Lee Kong Chian School Of Business

The idea of exporting Singapore’s expertise in infrastructure development took hold, in the early 1990s, as part of a larger regionalization strategy. Singapore’s positive reputation with multinational corporations for the efficiency of its industrial infrastructure and its stable, corrupt-free investment environment underscored this strategy. Led by Singapore’s government-linked companies, industrial parks were established in several Asian countries. Their progress is a test of Singapore’s ability to export its efficiency in industrial park development and management outside its borders. This paper finds that the initial optimism with which the flagship projects were unveiled has not been justified.

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A New Coincident Index Of Business Cycles Based On Monthly And Quarterly Series, Roberto S. Mariano, Yasutomo Murasawa Jul 2003

A New Coincident Index Of Business Cycles Based On Monthly And Quarterly Series, Roberto S. Mariano, Yasutomo Murasawa

Research Collection School Of Economics

Popular monthly coincident indices of business cycles, e.g. the composite index and the Stock-Watson coincident index, have two shortcomings. First, they ignore information contained in quarterly indicators such as real GDP. Second, they lack economic interpretation; hence the heights of peaks and the depths of troughs depend on the choice of an index. This paper extends the Stock-Watson coincident index by applying maximum likelihood factor analysis to a mixed-frequency series of quarterly real GDP and monthly coincident business cycle indicators. The resulting index is related to latent monthly real GDP. [PUBLICATION ABSTRACT]

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Detection Of Documentary Scene Changes By Audio-Visual Fusion, Atulya Velivelli, Chong-Wah Ngo, Thomas S. Huang Jul 2003

Detection Of Documentary Scene Changes By Audio-Visual Fusion, Atulya Velivelli, Chong-Wah Ngo, Thomas S. Huang

Research Collection School Of Computing and Information Systems

The concept of a documentary scene was inferred from the audio-visual characteristics of certain documentary videos. It was observed that the amount of information from the visual component alone was not enough to convey a semantic context to most portions of these videos, but a joint observation of the visual component and the audio component conveyed a better semantic context. From the observations that we made on the video data, we generated an audio score and a visual score. We later generated a weighted audio-visual score within an interval and adaptively expanded or shrunk this interval until we found a …

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Trifocal Morphing, Angus M. K. Siu, Ada S. K. Wan, Rynson W. H. Lau, Chong-Wah Ngo Jul 2003

Trifocal Morphing, Angus M. K. Siu, Ada S. K. Wan, Rynson W. H. Lau, Chong-Wah Ngo

Research Collection School Of Computing and Information Systems

Image morphing allows smooth transition between 2D images. However, one of the limitations of existing image morphing techniques is the lack of interaction - the viewpoints of the interpolated images are restrained to the line joining the optical centers of the source and the destination images. Another limitation of existing image morphing techniques is that shape warping often causes distortion due to barycentric mapping. In this paper, we present our trifocal morphing technique to address these problems. The new technique allows a user to change the viewpoint of the output images, i.e., increasing the degrees of freedom of interaction, and …

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A Generic Object-Oriented Tabu Search Framework, Hoong Chuin Lau Jul 2003

A Generic Object-Oriented Tabu Search Framework, Hoong Chuin Lau

Research Collection School Of Computing and Information Systems

Presently, most tabu search designers devise their applications without considering the potential of design and code reuse, which consequently prolong the development of subsequent applications. In this paper, we propose a software solution known as Tabu Search Framework (TSF), which is a generic C++ software framework for tabu search implementation. The framework excels in code recycling through the use of a welldesigned set of generic abstract classes that clearly define their collaborative roles in the algorithm. Additionally, the framework incorporates a centralized process and control mechanism that enhances the search with intelligence. This results in a generic framework that is …

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The Shapley-Shubik Index, The Donation Paradox And Ternary Games, Vincent C. H. Chua, H. C. Huang Jun 2003

The Shapley-Shubik Index, The Donation Paradox And Ternary Games, Vincent C. H. Chua, H. C. Huang

Research Collection School Of Economics

In this paper, we show that although the Shapley-Shubik index is immune to the donation paradox in weighted binary games, extension of the index to ternary games along the direction suggested in Felsenthal and Machover (1996, 1997) will cause it to be vulnerable to the paradox and this is the case as long as the number of players in the game exceeds three. This undermines the attractiveness of the Shapley-Shubik index as a measure of a priori voting power.

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The Quality Of Analysts Earnings Forecasts During The Asian Crisis: Evidence From Singapore, Roger Loh, Mujtaba Mian Jun 2003

The Quality Of Analysts Earnings Forecasts During The Asian Crisis: Evidence From Singapore, Roger Loh, Mujtaba Mian

Research Collection Lee Kong Chian School Of Business

Examines the efficiency of security analysts' earnings forecasts in Singapore. Regression of actual earnings change on forecasted change; Extremism in forecasted change; Impact of business crisis on the quality of earnings forecasts.

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Asian Hedge Funds: Return Persistence, Style, And Fund Characteristics, Francis Koh, Winston T. H. Koh, Melvyn Teo Jun 2003

Asian Hedge Funds: Return Persistence, Style, And Fund Characteristics, Francis Koh, Winston T. H. Koh, Melvyn Teo

Research Collection Lee Kong Chian School Of Business

This study explores the return persistence properties, styles, and fund characteristics of hedge funds that mainly invest in Asia. We examine, for the first time, a high resolution hedge fund dataset which includes monthly return information as well as detailed fund characteristics data. We find that the returns of Asian hedge funds persist most strongly at monthly horizons to quarterly horizons. This persistence weakens considerably when we lengthen the measurement period beyond a quarter, and does not appear to be due to the imputation of fees or to systematic risk as measured by a simple factor model. Further, we show …

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Reactions To Perceived Inequity In U.S. And Dutch Interorganizational Relationships, Lisa K. Scheer, Nirmalya Kumar, Jan-Benedict E. M. Steenkamp Jun 2003

Reactions To Perceived Inequity In U.S. And Dutch Interorganizational Relationships, Lisa K. Scheer, Nirmalya Kumar, Jan-Benedict E. M. Steenkamp

Research Collection Lee Kong Chian School Of Business

In an empirical examination of inequity in interorganizational relationships, we found similarities and differences in Dutch and U.S. automobile dealers' reactions to inequity in their relationships with their automobile suppliers. As predicted by equity theory, both positive and negative inequity have detrimental effects on the reactions of Dutch firms. In contrast, U.S. firms do not react negatively to positive inequity; only negative inequity has deleterious effects.

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Creating Competitive Advantage In The Global Marketplace: The Singapore Experiment In East Asia, Caroline Yeoh, Julian Ching Wei Wee, James Chan Jun 2003

Creating Competitive Advantage In The Global Marketplace: The Singapore Experiment In East Asia, Caroline Yeoh, Julian Ching Wei Wee, James Chan

Research Collection Lee Kong Chian School Of Business

No abstract provided.

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What Is The Social In Social Entrepreneurship?, Wee Liang Tan, John Williams, Teck Meng Tan Jun 2003

What Is The Social In Social Entrepreneurship?, Wee Liang Tan, John Williams, Teck Meng Tan

Research Collection School Of Accountancy

No abstract provided.

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On The Asymptotic Effect Of Substituting Estimators For Nuisance Parameters In Inferential Statistics, Zhenlin Yang, Yiu Kuen Tse, Zhidong Bai Jun 2003

On The Asymptotic Effect Of Substituting Estimators For Nuisance Parameters In Inferential Statistics, Zhenlin Yang, Yiu Kuen Tse, Zhidong Bai

Research Collection School Of Economics

This paper studies the general problem of making inferences for a set of parameters ? in the presence of another set of (nuisance) parameters λ, based on the statistic T(y; ˆλ, θ), where y = {y1, y2, · · · , yn} represents the data, ˆλ is an estimator of λ and the limiting distribution of T(y; λ, θ) is known. We provide general methods for finding the limiting distributions of T(y; ˆλ, θ) when ˆλ is either a constrained estimator (given θ) or an unconstrained estimator. The methods will facilitate hypothesis testing as well as confidence-interval construction. We also …

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Cultural And Socioeconomic Influences On Divorce During Modernization: Southeast Asia, 1940s To 1960s, Charles Hirschman, Bussarawan Teerawichitchainan Jun 2003

Cultural And Socioeconomic Influences On Divorce During Modernization: Southeast Asia, 1940s To 1960s, Charles Hirschman, Bussarawan Teerawichitchainan

Research Collection School of Social Sciences

The conventional model of a rising divorce rate during the process of modernization is a staple element of the sociological theory of the family. This generalization is challenged, however, by traditional high-divorce societies, primarily in Islamic Southeast Asia, which have experienced a decline in divorce with modernization. In this study, based on micro-level survey data, the authors explore the social roots of marital disruption in Indonesia and Malaysia and in another Southeast Asian society, Thailand, which has not been identified as a high-divorce society. Comparable survey data from the 1970s (from the World Fertility Survey) allow for an in-depth analysis …

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Providing Health Care For Older Persons In Singapore, Peggy Teo, Angelique Chan, Paulin Straughan Jun 2003

Providing Health Care For Older Persons In Singapore, Peggy Teo, Angelique Chan, Paulin Straughan

Research Collection School of Social Sciences

Health care social policy in Singapore has passed the burden of care to the individual and the family on the rationale that it would enable the state to contain the costs of long-term care by channelling some of its funds to community services and to providing essential health services to all Singaporeans and not just the older group. While a wide array of services has come into existence, there is a lack of integration between the available resources and needs of the individual/family and what has been availed at the community and state levels. Part of the problem lies in …

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Responsibility For Past Injustice: How To Shift The Burden, Chandran Kukathas Jun 2003

Responsibility For Past Injustice: How To Shift The Burden, Chandran Kukathas

Research Collection School of Social Sciences

This article considers the question of the responsibility of present generations for injustices committed by previous ones. It asks whether the descendants of victims of past injustice have claims against the descendants of the perpetrators of injustice. Two modes of argument are examined: the individual responsibility approach, according to which descendants cannot have claims against other descendants, and the collective responsibility approach, according to which descendants do have strong claims. Both approaches are criticized, but for different failings. An alternative view, building on the individualist approach, is defended. This view argues that some people may have to bear responsibility for …

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Transborder Industrialization And Singapore's Regionalization Strategy: Singapore's Industrial Parks In Indonesia And China - Boom, Bane Or An Ongoing Game?, Caroline Yeoh, Charmaine Jialing Cai, Julian Ching Wei Wee Jun 2003

Transborder Industrialization And Singapore's Regionalization Strategy: Singapore's Industrial Parks In Indonesia And China - Boom, Bane Or An Ongoing Game?, Caroline Yeoh, Charmaine Jialing Cai, Julian Ching Wei Wee

Research Collection Lee Kong Chian School Of Business

Singapore’s regionalization program is centred on a number of industrial township developments in China, India and several Southeast Asian countries. These townships are led by Singapore government-linked companies and are premised on the perception that Singapore’s positive reputation with multinational corporations, for efficient industrial infrastructure and stable, corrupt-free administration, will give the townships a marketing advantage. Their progress is a litmus test of Singapore’s ability to export its efficiency in industrial park development and management outside its borders. This paper discusses the origins and progress of the four largest and most advanced townships, two in Indonesia and two in China. …

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Privacy And Attitudes Towards Internet-Based Selection Systems: A Cross-Cultural Comparison, Michael M. Harris, Greet Van Hoye, Filip Lievens Jun 2003

Privacy And Attitudes Towards Internet-Based Selection Systems: A Cross-Cultural Comparison, Michael M. Harris, Greet Van Hoye, Filip Lievens

Research Collection Lee Kong Chian School Of Business

This paper examines perceptions of privacy and how they relate to reluctance to submit employment-related information over the Internet. In addition, possible cross-cultural differences between the US and Belgium regarding these constructs and the role of Internet knowledge are investigated. Based on theories of privacy and cross-cultural differences, a survey methodology was applied to test several hypotheses. Results suggest that privacy considerations may affect reluctance to use an Internet-based selection system. Moreover, as expected, some differences were observed between US and Belgian respondents. Respondents possessing a higher self-rated knowledge of the Internet were less concerned that employment-related data submitted over …

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Predicting Cross-Cultural Training Performance: The Validity Of Personality, Cognitive Ability, And Dimensions Measured By An Assessment Center And A Behavior Description Interview, Filip Lievens, Michael M. Harris, Etienne Van Keer, Claire Bisqueret Jun 2003

Predicting Cross-Cultural Training Performance: The Validity Of Personality, Cognitive Ability, And Dimensions Measured By An Assessment Center And A Behavior Description Interview, Filip Lievens, Michael M. Harris, Etienne Van Keer, Claire Bisqueret

Research Collection Lee Kong Chian School Of Business

This study examined the validity of a broad set of predictors for selecting European managers for a cross-cultural training program in Japan. The selection procedure assessed cognitive ability, personality, and dimensions measured by assessment center exercises and a behavior description interview. Results show that the factor Openness was significantly related to cross-cultural training performance, whereas. cognitive ability was significantly correlated with language acquisition. The dimensions of adaptability, teamwork, and communication as measured by a group discussion exercise provided incremental variance in both criteria, beyond cognitive ability and personality. In general, these results are consistent with the literature on domestic selection, …

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Modeling Product Development As A System Design Game, C. Jason Woodard Jun 2003

Modeling Product Development As A System Design Game, C. Jason Woodard

Research Collection School Of Computing and Information Systems

A system design game is a model of a situation in which agents’ actions determine the structure of a system, which in turn affects the system’s value and the share of value that each agent may capture through bargaining or market competition. This paper describes a class of games in which agents design interdependent products, for example software programs, which may be complements or substitutes for each other. These relationships are epresented by an object called a design structure network (DSN). Depending on the modeler’s choice of allocation rules, agents may benefit from owning critical nodes in the DSN, corresponding …

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Strategyproof Mechanisms For Ad Hoc Network Formation, C. Jason Woodard, David C. Parkes Jun 2003

Strategyproof Mechanisms For Ad Hoc Network Formation, C. Jason Woodard, David C. Parkes

Research Collection School Of Computing and Information Systems

Agents in a peer-to-peer system typically have incentives to influence its network structure, either to reduce their costs or increase their ability to capture value. The problem is compounded when agents can join and leave the system dynamically. This paper proposes three economic mechanisms that offset the incentives for strategic behavior and facilitate the formation of networks with desirable global properties.

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Using Support Vector Machines For Terrorism Information Extraction, Aixin Sun, Myo-Myo Naing, Ee Peng Lim, Wai Lam Jun 2003

Using Support Vector Machines For Terrorism Information Extraction, Aixin Sun, Myo-Myo Naing, Ee Peng Lim, Wai Lam

Research Collection School Of Computing and Information Systems

Information extraction (IE) is of great importance in many applications including web intelligence, search engines, text understanding, etc. To extract information from text documents, most IE systems rely on a set of extraction patterns. Each extraction pattern is defined based on the syntactic and/or semantic constraints on the positions of desired entities within natural language sentences. The IE systems also provide a set of pattern templates that determines the kind of syntactic and semantic constraints to be considered. In this paper, we argue that such pattern templates restricts the kind of extraction patterns that can be learned by IE systems. …

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Parameter Optimization In The Regularized Shannon's Kernels Of Higher-Order Discrete Singular Convolutions, Wei Xiong, Yibao Zhao, Yun Gu May 2003

Parameter Optimization In The Regularized Shannon's Kernels Of Higher-Order Discrete Singular Convolutions, Wei Xiong, Yibao Zhao, Yun Gu

Research Collection Lee Kong Chian School Of Business

The δ-type discrete singular convolution (DSC) algorithm has recently been proposed and applied to solve kinds of partial differential equations (PDEs). With appropriate parameters, particularly the key parameter r in its regularized Shannon's kernel, the DSC algorithm can be more accurate than the pseudospectral method. However, it was previously selected empirically or under constrained inequalities without optimization. In this paper, we present a new energy-minimization method to optimize r for higher-order DSC algorithms. Objective functions are proposed for the DSC algorithm for numerical differentiators of any differential order with any discrete convolution width. Typical optimal parameters are also shown. The …

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Catch-Up Growth Based On International Talent Mobility In An Idea-Based World, Yu Quan, Hian Teck Hoon May 2003

Catch-Up Growth Based On International Talent Mobility In An Idea-Based World, Yu Quan, Hian Teck Hoon

Research Collection School Of Economics

We show how catch-up growth can result when immigrant ties of talented people to their home countries facilitate technology diffusion from world technological leaders to developing countries. The aspect of immigrant link we focus on is knowledge spillover through various programs of international exchange to draw upon the expertise of the individuals who have migrated—a type of externality effect on the home country. In our model, we distinguish between public technology and private technology, both of which differ across countries. The size of the talent pool in each country determines the number of skilled workers and indigenous technology levels. The …

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