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Transaction-Data Analysis Of Marked Durations And Their Implications For Market Microstructure, Anthony S. Tay, Christopher Ting, Yiu Kuen Tse, Mitchell Warachka Mar 2004

Transaction-Data Analysis Of Marked Durations And Their Implications For Market Microstructure, Anthony S. Tay, Christopher Ting, Yiu Kuen Tse, Mitchell Warachka

Research Collection Lee Kong Chian School Of Business

We propose an Autoregressive Conditional Marked Duration (ACMD) model for the analysis of irregularly spaced transaction data. Based on the Autoregressive Conditional Duration (ACD) model, the ACMD model assigns marks to characterize events such as tick movements and trade directions (buy/sell). Applying the ACMD model to tick movements, we study the influence of trade frequency, direction and size on price dynamics, volatility and the permanent and transitory price impacts of trade. We also apply the ACMD model to analyze trade-direction data and estimate the probability of informed trading (PIN). We find that trade frequency has a critical role in price …

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The Fashion Of Management Fashion: A Surge Too Far?, Timothy Adrian Robert Clark Mar 2004

The Fashion Of Management Fashion: A Surge Too Far?, Timothy Adrian Robert Clark

Research Collection Lee Kong Chian School Of Business

In recent years there has been growing interest in the notion that management ideas and techniques are subject to swings in fashion in the same way that aesthetic aspects of life such as clothing styles, hair length, music tastes, furniture design, paint colours, and so forth are characterized by surges of popularity and then decline. Adopting a predominantly neo-institutional perspective, researchers have conceived of management fashions as techniques that fail to become firmly entrenched and institutionalized since organizations are attracted to them for a period and then abandon them in favour of apparently newer and more promising ones. Drawing on …

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The Evolution Of Research On Information Systems: A Fiftieth Year Survey Of The Literature In Management Science, Rajiv D. Banker, Robert J. Kauffman Mar 2004

The Evolution Of Research On Information Systems: A Fiftieth Year Survey Of The Literature In Management Science, Rajiv D. Banker, Robert J. Kauffman

Research Collection School Of Computing and Information Systems

The development of the information systems (IS) literature in Management Science during the past 50 years reflects the inception, growth, and maturation of several different research streams. The five research streams we identify incorporate different definitions of the managerial problems that relate to IS, the alternate theoretical perspectives and different methodological paradigms to study them, and the levels of the organization at which their primary results impact managerial practice. The decision support and design science research stream studies the application of computers in decision support, control, and managerial decision making. The value of information research stream reflects relationships established based …

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Tool Support For Model Based Architectural Design For Automotive Control Systems, Kevin Steppe Mar 2004

Tool Support For Model Based Architectural Design For Automotive Control Systems, Kevin Steppe

Research Collection School Of Computing and Information Systems

In conjunction with Ford Motor Company, we built a tool to support multilevel architectural design. The tool, called Synergy, allows Ford to visually design architectures of vehicle control components. The components are imported from existing Simulink models; then the tool automatically generates a detailed view showing all required connections and ports. The resulting model is exported to Simulink for further analysis. In this paper we describe the conceptual and technical challenges encountered in building Synergy and our design choices for solving them.

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Singapore Management University Appoints Howard Hunter As University’S New President, Singapore Management University Mar 2004

Singapore Management University Appoints Howard Hunter As University’S New President, Singapore Management University

SMU Press Releases and News

No abstract provided.

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Cross-Situational Consistency Of Affective Experiences Across Cultures, Shigehiro Oishi, Ed Diener, Christie N. Scollon, Robert Biswas-Diener Mar 2004

Cross-Situational Consistency Of Affective Experiences Across Cultures, Shigehiro Oishi, Ed Diener, Christie N. Scollon, Robert Biswas-Diener

Research Collection School of Social Sciences

This study examined cross-situational consistency of affective experiences using an experience-sampling method in Japan, India, and the United States. Participants recorded their moods and situations when signaled at random moments for 7 days. The authors examined relative (interindividual) consistency and absolute (within-person) consistency. They found stable interindividual differences of affective experiences across various situations (mean r = .52 for positive affect .51 for negative affect) and cultural invariance of the cross-situational consistency of affective experiences. Simultaneously, the authors found a considerable degree of within-person cross-situational variation in affective experiences, and cultural differences in within-person cross-situational consistency. Thus, global affective traits …

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Organic Production Systems: What The Biological Cell Can Teach Us About Manufacturing, Lieven Demeester, Knut Eichler, Christoph H. Loch Mar 2004

Organic Production Systems: What The Biological Cell Can Teach Us About Manufacturing, Lieven Demeester, Knut Eichler, Christoph H. Loch

Research Collection Lee Kong Chian School Of Business

Biological cells run complicated and sophisticated production systems. The study of the cell's production technology provides us with insights that are potentially useful in industrial manufacturing. When comparing cell metabolism with manufacturing techniques in industry, we find some striking commonalities, but also some important differences. Like today's well-run factories, the cell operates a very lean production system, assures quality at the source, and uses component commonality to simplify production. While we can certainly learn from how the cell accomplishes these parallels, it is even more interesting to look at how the cell operates differently. In biological cells, all products and …

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Phoneme-Based Transliteration Of Foreign Names For Oov Problem, Wei Gao, Kam-Fai Wong, Wai Lam Mar 2004

Phoneme-Based Transliteration Of Foreign Names For Oov Problem, Wei Gao, Kam-Fai Wong, Wai Lam

Research Collection School Of Computing and Information Systems

A proper noun dictionary is never complete rendering name translation from English to Chinese ineffective. One way to solve this problem is not to rely on a dictionary alone but to adopt automatic translation according to pronunciation similarities, i.e. to map phonemes comprising an English name to the phonetic representations of the corresponding Chinese name. This process is called transliteration. We present a statistical transliteration method. An efficient algorithm for aligning phoneme chunks is described. Unlike rule-based approaches, our method is data-driven. Compared to source-channel based statistical approaches, we adopt a direct transliteration model, i.e. the direction of probabilistic estimation …

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Efficient Group Pattern Mining Using Data Summarization, Yida Wang, Ee Peng Lim, San-Yih Hwang Mar 2004

Efficient Group Pattern Mining Using Data Summarization, Yida Wang, Ee Peng Lim, San-Yih Hwang

Research Collection School Of Computing and Information Systems

In group pattern mining, we discover group patterns from a given user movement database based on their spatio-temporal distances. When both the number of users and the logging duration are large, group pattern mining algorithms become very inefficient. In this paper, we therefore propose a spherical location summarization method to reduce the overhead of mining valid 2-groups. In our experiments, we show that our group mining algorithm using summarized data may require much less execution time than that using non-summarized data.

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Effects Of Query Complexity And Learning On Novice User Query Performance With Conceptual And Logical Database Interfaces, Keng Siau, Hock Chuan Chan, Kwok Kee Wei Mar 2004

Effects Of Query Complexity And Learning On Novice User Query Performance With Conceptual And Logical Database Interfaces, Keng Siau, Hock Chuan Chan, Kwok Kee Wei

Research Collection School Of Computing and Information Systems

Users see the database interface as the database system. A good interface enables them to formulate queries better. The semantics communicated through the interface can be classified according to abstraction levels, such as the conceptual and logical levels. With the conceptual interface, interaction is in terms of real-world concepts such as entities, objects and relationships. Current user-database interaction is mainly based on the logical interface, where interaction is in terms of abstract database concepts such as relations and joins. Many researchers argue that end users will perform better with the conceptual interface. This research tested this claim, as well as …

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A Smart-Card-Enabled Privacy Preserving E-Prescription System, Yanjiang Yang, Xiaoxi Han, Feng Bao, Robert H. Deng Mar 2004

A Smart-Card-Enabled Privacy Preserving E-Prescription System, Yanjiang Yang, Xiaoxi Han, Feng Bao, Robert H. Deng

Research Collection School Of Computing and Information Systems

Within the overall context of protection of health care information, privacy of prescription data needs special treatment. First, the involvement of diverse parties, especially nonmedical parties in the process of drug prescription complicates the protection of prescription data. Second, both patients and doctors have privacy stakes in prescription, and their privacy should be equally protected. Third, the following facts determine that prescription should not be processed in a truly anonymous manner: certain involved parties conduct useful research on the basis of aggregation of prescription data that are linkable with respect to either the patients or the doctors; prescription data has …

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An Information-Theoretic Framework For Optimal Location Tracking In Multi-System 4g Wireless Networks, Archan Misra, Abhishek Roy, Sajal K. Das Mar 2004

An Information-Theoretic Framework For Optimal Location Tracking In Multi-System 4g Wireless Networks, Archan Misra, Abhishek Roy, Sajal K. Das

Research Collection School Of Computing and Information Systems

An information-theoretic framework is developed for optimal location management in multisystem, fourth generation (4G) wireless networks. The framework envisions that each individual subsystem operates fairly independently, and does not require public knowledge of individual subnetwork topologies. To capture the variation in paging and location update costs in this heterogeneous environment, the location management problem is formulated in terms of a new concept of weighted entropy. The update process is based on the Lempel-Ziv compression algorithms, which are applied to a vector-valued sequence consisting of both the mobile's movement pattern and its session activity state. Three different tracking strategies which differ …

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Clash: A Protocol For Internet-Scale Utility-Oriented Distributed Computing, Archan Misra, Paul Castro, Jinwon Lee Mar 2004

Clash: A Protocol For Internet-Scale Utility-Oriented Distributed Computing, Archan Misra, Paul Castro, Jinwon Lee

Research Collection School Of Computing and Information Systems

Distributed hash table (DHT) overlay networks offer an efficient and robust technique for wire-area data storage and queries. Workload from real applications that use DHT networks will likely exhibit significant skews that can result in bottlenecks and failures that limit the overall scalability of the DHT approach. We present the content and load-aware scalable hashing (CLASH) protocol that can enhance the load distribution behavior of a DHT. CLASH relies on a variable-length identifier key scheme, where the length of any individual key is a function of load. CLASH uses variable-length keys to cluster content-related objects on single nodes to achieve …

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Strategy Viewed From A Management Fashion Perspective, Timothy Adrian Robert Clark Mar 2004

Strategy Viewed From A Management Fashion Perspective, Timothy Adrian Robert Clark

Research Collection Lee Kong Chian School Of Business

This article argues for the greater inclusion of external agents within strategy research. Drawing on the emergent management fashion literature, it conceives of these as a group of actors operating within a management fashion‐setting arena. The outputs of this community dominate conceptions of what are deemed legitimate strategic actions. They thus have a critical, if presently neglected, impact on the nature strategy. The roles of the members of the management fashion‐setting community are described and three promising areas of research outlined.

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Effects Of Board Structure On Firm Performance: A Comparison Of Japan And Australia, Ingrid Bonn, Toru Yoshikawa, Phillip H. Phan Mar 2004

Effects Of Board Structure On Firm Performance: A Comparison Of Japan And Australia, Ingrid Bonn, Toru Yoshikawa, Phillip H. Phan

Research Collection Lee Kong Chian School Of Business

This article compares the effects of board size, proportion of female directors, proportion of outside directors and average age of directors on firm performance in Japanese and Australian firms. We found that board size and age of directors were negatively associated with the performance of Japanese firms. For Australian firms, outsider ratio and female director ratio were positively associated with performance.

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Entry Mode And Performance In A Transitional Economy: A Framework For Foreign-Invested Enterprises In China, Howard Davies, Jin K. Han, Namwoon Kim, Jae H. Pae Mar 2004

Entry Mode And Performance In A Transitional Economy: A Framework For Foreign-Invested Enterprises In China, Howard Davies, Jin K. Han, Namwoon Kim, Jae H. Pae

Research Collection Lee Kong Chian School Of Business

A conceptual framework is developed, bringing together entry mode, the influence of state officials, and the adoption of a customer-driven orientation in order to explain the performance of foreign-invested firms in a transitional economy. The model is tested on a sample of firms in China across eight provinces and cities, spread across the relatively developed South Coast, the Central Belt formed by Shanghai and the Yangzi basin and the less-developed North and West. We find that the decision to enter through a joint venture reduces the customer focus of the enterprise. Contrary to expectation, however, we find no positive relationship …

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Equity Style Returns And Institutional Investor Flows, Kenneth A. Froot, Melvyn Teo Mar 2004

Equity Style Returns And Institutional Investor Flows, Kenneth A. Froot, Melvyn Teo

Research Collection Lee Kong Chian School Of Business

This paper explores institutional investor trades in stocks grouped by style and the relationship of these trades with equity market returns. It aggregates transactions drawn from a large universe of approximately $6 trillion of institutional funds. To analyze style behavior, we assign equities to deciles in each of five style dimensions: size, value/growth, cyclical/defensive, sector, and country. We find, first, strong evidence that investors organize and trade stocks across style-driven lines. This appears true for groupings both strongly and weakly related to fundamentals (e.g., industry orcountry groupings versus size or value/growth deciles). Second, the positive linkage between flows and returns …

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"I Think They Discriminated Against Me": Using Prototype Theory And Organizational Justice Theory For Understanding Perceived Discrimination In Selection And Promotion Situations, Michael M. Harris, Filip Lievens, Greet Van Hoye Mar 2004

"I Think They Discriminated Against Me": Using Prototype Theory And Organizational Justice Theory For Understanding Perceived Discrimination In Selection And Promotion Situations, Michael M. Harris, Filip Lievens, Greet Van Hoye

Research Collection Lee Kong Chian School Of Business

Research in industrial/organizational (I/O) psychology has generally focused on objective measures of employment discrimination and has virtually neglected individuals' subjective perceptions as to whether a selection or promotion process is discriminatory or not. This paper presents two theoretical models as organizing frameworks to explain candidates' likelihood of perceiving that discrimination has occurred in a certain selection or Promotion situation. The prototype model stresses the importance of the prototypical victim-perpetrator combination, the perceived intention of the decision-maker, and the perceived harm caused as possible antecedents of perceived employment discrimination. In the organizational justice model, procedural, informational, interpersonal, and distributive fairness play …

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Solving Hierarchical Constraints Over Finite Domains With Local Search, Martin Henz, Roland H.C. Yap, Yun Fong Lim, Seet Chong Lua, J. Paul Walser, Xiao Ping Shi Mar 2004

Solving Hierarchical Constraints Over Finite Domains With Local Search, Martin Henz, Roland H.C. Yap, Yun Fong Lim, Seet Chong Lua, J. Paul Walser, Xiao Ping Shi

Research Collection Lee Kong Chian School Of Business

Many real world problems have requirements and constraints which conflict with each other. One approach for dealing with such over-constrained problems is with constraint hierarchies. In the constraint hierarchy framework, constraints are classified into ranks, and appropriate solutions are selected using a comparator which takes into account the constraints and their ranks. In this paper, we present a local search solution to solving hierarchical constraint problems over finite domains (HCPs). This is an extension of local search for over-constrained integer programs WSAT(OIP) to constraint hierarchies and general finite domain constraints.The motivation for this work arose from solving large airport gate …

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A Modeling Framework For Computing Lifetime And Information Capacity In Wireless Sensor Networks, Enrique Duarte-Melo, Mingyan Liu, Archan Misra Mar 2004

A Modeling Framework For Computing Lifetime And Information Capacity In Wireless Sensor Networks, Enrique Duarte-Melo, Mingyan Liu, Archan Misra

Research Collection School Of Computing and Information Systems

In this paper we investigate the expected lifetime and information capacity, defined as the maximum amount of data (bits) transferred before the first sensor node death due to energy depletion, of a data-gathering wireless sensor network. We develop a fluidflow based computational framework that extends the existing approach, which requires precise knowledge of the layout/deployment of the network, i.e., exact sensor positions. Our method, on the other hand, views a specific network deployment as a particular instance (sample path) from an underlying distribution of sensor node layouts and sensor data rates.

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Group Nearest Neighbor Queries, Dimitris Papadias, Qiongmao Shen, Yufei Tao, Kyriakos Mouratidis Mar 2004

Group Nearest Neighbor Queries, Dimitris Papadias, Qiongmao Shen, Yufei Tao, Kyriakos Mouratidis

Research Collection School Of Computing and Information Systems

Given two sets of points P and Q, a group nearest neighbor (GNN) query retrieves the point(s) of P with the smallest sum of distances to all points in Q. Consider, for instance, three users at locations q1 , q2 and q3 that want to find a meeting point (e.g., a restaurant); the corresponding query returns the data point p that minimizes the sum of Euclidean distances |pqi| for 1 ≤i ≤3. Assuming that Q fits in memory and P is indexed by an R-tree, we propose several algorithms for finding the group nearest neighbors efficiently. As a second step, …

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Hiding Data Accesses In Steganographic File System, Xuan Zhou, Hwee Hwa Pang, Kian-Lee Tan Mar 2004

Hiding Data Accesses In Steganographic File System, Xuan Zhou, Hwee Hwa Pang, Kian-Lee Tan

Research Collection School Of Computing and Information Systems

To support ubiquitous computing, the underlying data have to be persistent and available anywhere-anytime. The data thus have to migrate from devices local to individual computers, to shared storage volumes that are accessible over open network. This potentially exposes the data to heightened security risks. We propose two mechanisms, in the context of a steganographic file system, to mitigate the risk of attacks initiated through analyzing data accesses from user applications. The first mechanism is intended to counter attempts to locate data through updates in between snapshots - in short, update analysis. The second mechanism prevents traffic analysis - identifying …

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Knowledge-Based Support In A Group Decision-Making Context: An Expert-Novice Comparison, Fiona Fui-Hoon Nah, I. Benbasat Mar 2004

Knowledge-Based Support In A Group Decision-Making Context: An Expert-Novice Comparison, Fiona Fui-Hoon Nah, I. Benbasat

Research Collection School Of Computing and Information Systems

This research examines the use of knowledge-based and explanation facilities to support group decision making of experts versus novices. Consistent with predictions from the persuasion literature, our results show that experts exhibit a higher level of criticality and involvement in their area of expertise; this not only decreases their likelihood of being persuaded by a knowledge-based system, but also accounts for a lower group consensus among experts as compared to novices. Novices are more easily persuaded by the system and find the system to be more useful than experts do. This research integrates theories from the persuasion literature to understand …

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Is Global Civil Society A Good Thing?, Ann Florini Mar 2004

Is Global Civil Society A Good Thing?, Ann Florini

Research Collection School of Social Sciences

Washingtons — Tanks in the streets of Seattle in 1999. Molotov cocktails in Prague in 2000. Gunfire in Genoa in 2001. A hundred thousand people gathering every winter in a World Social Forum to talk about how to improve the world. Global agreements on everything from human rights protections to banning weapons systems. Fifteen million people on the streets in cities around the world on a single day in 2003 to protest the Iraq war. These headlines reflect the rise of a force now so potent in world affairs that the New York Times has referred to it as “the …

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National Insecurities: Humiliation, Salvation And Chinese Nationalism, William A. Callahan Mar 2004

National Insecurities: Humiliation, Salvation And Chinese Nationalism, William A. Callahan

Research Collection School of Social Sciences

While I was researching the South China Sea disputes between China, Vietnam, and the Philippines, I came upon an unlikely refer ence. In an otherwise hard-nosed analysis of the issue, a noted Chi nese expert cited a book called the Atlas of Shame. This odd juxta position of security studies, territoriality, and emotion piqued my interest, and I asked a friend in Beijing to track down this curious book. Once I got a copy of the Atlas of the Century of National Humili ation in Modern China, the correct title, I was fascinated by what seemed to be a unique …

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Diasporic Tycoons, Outlaw States And Beijing Bastards: The Contingent Politics Of Greater China, William A. Callahan Mar 2004

Diasporic Tycoons, Outlaw States And Beijing Bastards: The Contingent Politics Of Greater China, William A. Callahan

Research Collection School of Social Sciences

No abstract provided.

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Have U.S. - Japan Trade Agreements Made A Difference?, Byron Gangnes, Craig Parsons Mar 2004

Have U.S. - Japan Trade Agreements Made A Difference?, Byron Gangnes, Craig Parsons

Research Collection School Of Economics

International trade is governed by a complicated patchwork of international treaties, bilateral agreements, and unilateral actions, often directed at trade in very specific commodities. A determination of the impact of trade measures begins with an assessment of their direct effect on trade volumes and prices in targeted sectors. While in some cases—such as the recent U.S. anti-dumping duties on steel—the measures have readily identifiable impacts, in others cases the effects are more difficult to determine.

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The Empirical Relationship Between Exchange Rates And Interest Rates In Post-Crisis Asia, Hwee Kwan Chow, Yoonbai Kim Mar 2004

The Empirical Relationship Between Exchange Rates And Interest Rates In Post-Crisis Asia, Hwee Kwan Chow, Yoonbai Kim

Research Collection School Of Economics

In post-crisis Asia, all crisis-hit countries (except Malaysia) announced a shift from exchange rate based monetary policy framework to the explicit adoption of inflation targeting that uses interest rates as the key monetary policy operating instrument. In this study, we examine the empirical relationship between exchange rates and interest rates, and investigate how the dynamics between them have changed following the crisis. This is carried out by constructing a bivariate VAR-GARCH model for each of the four Asian crisis countries, namely Indonesia, Korea, Philippines and Thailand. The findings suggest these countries do not use interest rate policy more actively to …

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Trade, Capital Accumulation And Structural Unemployment: An Empirical Study Of The Singapore Economy, Hiau Looi Kee, Hian Teck Hoon Mar 2004

Trade, Capital Accumulation And Structural Unemployment: An Empirical Study Of The Singapore Economy, Hiau Looi Kee, Hian Teck Hoon

Research Collection School Of Economics

This paper studies the factors responsible for the secular decline of Singapore’s unemployment rate over the period 1966-2000 in an environment of low and stable inflation rates. We introduce wage bargaining and unions into a specific-factors, two-sector economy with an export sector and a non-tradable sector to obtain an endogenous natural unemployment rate. Increases in the relative export price and capital stock in the export sector are predicted to reduce structural unemployment. These hypotheses could not be rejected based on structural estimations and co-integration regressions. Empirically, capital accumulation in the export sector explains most of the decline in Singapore’s unemployment …

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Road Congestion Pricing In Singapore: 1975-2003, Sock-Yong Phang, Rex S. Toh Mar 2004

Road Congestion Pricing In Singapore: 1975-2003, Sock-Yong Phang, Rex S. Toh

Research Collection School Of Economics

Facing traffic congestion in the Central Business District and enormous demands on scarce land resources by the growing number of motor vehicles, Singapore, a small island city-state the size of Seattle, embarked on a bold decision to reduce road congestion by implementing the famous Area Licensing Scheme in 1975. This was a manual system of tolls for multiple entries into the Restricted Zone. While achieving the intended effect of cutting down on the volume of vehicular traffic in the Restricted Zone, the authors (and others) found that the problem of congestion had merely shifted in time and place. Many changes …

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