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Articles 7291 - 7320 of 8681
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Making Transparency Work, Ann Florini
Making Transparency Work, Ann Florini
Research Collection School of Social Sciences
A commentary on Gupta and Mason, who provide a valuable service in highlighting the complex andcontested nature of transparency as a tool of governance. In an era in which information flows and information technology play such fundamental roles, andin which norms about who has the right to know what are so rapidly changing,transparency clearly deserves its place as, in Gupta’s words, “a key concept of ourtimes.”
A Dynamic Trust Management Scheme To Mitigate Malware Proliferation In P2p Networks, Xuhua Ding, Wei Yu, Ying Pan
A Dynamic Trust Management Scheme To Mitigate Malware Proliferation In P2p Networks, Xuhua Ding, Wei Yu, Ying Pan
Research Collection School Of Computing and Information Systems
The surge of peer-to-peer (P2P) networks consisting of thousands of of hosts makes them a breeding ground for malware proliferation. Although some existing studies have shown that malware proliferation can pose significant threats to P2P networks, defending against such an attack is largely an open problem. This paper aims to develop the countermeasure that can effectively mitigate the malware proliferation while preserving P2P networks' performance. To this end, we propose a dynamic trust management scheme based upon localized trust evaluation and alert propagation which prevents innocent peers from downloading files from infected peers. Our analysis and experimental results show that …
Governance Role Of Auditors And Legal Environment: Evidence From Corporate Disclosure Transparency, Sam Han, Tony Kang, Yong Keun Yoo
Governance Role Of Auditors And Legal Environment: Evidence From Corporate Disclosure Transparency, Sam Han, Tony Kang, Yong Keun Yoo
Research Collection School Of Accountancy
This study examines whether auditor size associates with disclosure transparency. Given thatprior studies generally focus on discretionary accruals to investigate the relation betweenauditor size and financial reporting quality, there is little evidence on how auditor size relates toother attributes of reporting quality. Further, studies that examine this associationinternationally produce mixed results as to how auditor size relates to reporting quality indifferent legal origins. Focusing on corporate disclosure transparency (i.e., disclosure levels), wefind that auditor size and disclosure level are positively associated across countries and that theassociation is stronger in code law regimes than in common law regimes. The latter findingsupports …
Verifying Completeness Of Relational Query Answers From Online Servers, Hwee Hwa Pang, Kian-Lee Tan
Verifying Completeness Of Relational Query Answers From Online Servers, Hwee Hwa Pang, Kian-Lee Tan
Research Collection School Of Computing and Information Systems
The number of successful attacks on the Internet shows that it is very difficult to guarantee the security of online servers over extended periods of time. A breached server that is not detected in time may return incorrect query answers to users. In this article, we introduce authentication schemes for users to verify that their query answers from an online server are complete (i.e., no qualifying tuples are omitted) and authentic (i.e., all the result values are legitimate). We introduce a scheme that supports range selection, projection as well as primary key-foreign key join queries on relational databases. We also …
Keeping Up With The Joneses: A Field Study Of The Relationships Among Upward, Lateral, And Downward Comparisons And Pay Level Satisfaction, Michael M. Harris, Frederik Anseel, Filip Lievens
Keeping Up With The Joneses: A Field Study Of The Relationships Among Upward, Lateral, And Downward Comparisons And Pay Level Satisfaction, Michael M. Harris, Frederik Anseel, Filip Lievens
Research Collection Lee Kong Chian School Of Business
The authors examined the relationship between the direction of pay comparisons and pay level satisfaction. They hypothesized that upward pay comparisons would significantly predict pay level satisfaction, even when controlling for other comparisons. Results reported in 2 samples (U.S. sample, N = 295; Belgian sample, N = 67) generally supported this hypothesis. Analyses showed that individuals who were paid much less than their upward pay comparison were dissatisfied with their pay level. The highest levels of pay level satisfaction were observed when actual pay was congruent with the upward comparison pay level. There was also evidence that individuals who were …
A Scalable Approach To Multi-Style Architectural Modeling And Verification, Stephen Wong, Jing Sun, Ian Warren, Jun Sun
A Scalable Approach To Multi-Style Architectural Modeling And Verification, Stephen Wong, Jing Sun, Ian Warren, Jun Sun
Research Collection School Of Computing and Information Systems
Software Architecture represents the high level description of a system in terms of components, external properties and communication. Despite its importance in the software engineering process, the lack of formal description and verification support limits the value of developing architectural models. Automated formal engineering methods can provide an effective means to precisely describe and rigorously verify intended structures and behaviors of software systems. In this paper, we present an approach to support the design and verification of software architectural models using the Alloy analyzer. Based on our earlier work, we propose a fundamental library for specifying system structures in terms …
A Formal Model Of Semantic Web Service Ontology (Wsmo) Execution, Hai H. Wang, Nick Gibbins, Terry R. Payne, Ahmed Saleh, Jun Sun
A Formal Model Of Semantic Web Service Ontology (Wsmo) Execution, Hai H. Wang, Nick Gibbins, Terry R. Payne, Ahmed Saleh, Jun Sun
Research Collection School Of Computing and Information Systems
Semantic Web services have been one of the most significant research areas within the semantic Web vision, and have been recognized as a promising technology that exhibits huge commercial potential. Current semantic Web service research focuses on defining models and languages for the semantic markup of all relevant aspects of services, which are accessible through a Web service interface. The Web service modelling ontology (WSMO) is one of the most significant semantic Web service framework proposed to date. To support the standardization and tool support of WSMO, a formal semantics of the language is highly desirable. As there are a …
Retirement Planning: Most People Don’T Know How Nor Even Think About It, Knowledge@Smu
Retirement Planning: Most People Don’T Know How Nor Even Think About It, Knowledge@Smu
Knowledge@SMU
Worldwide, individuals are being asked to make more of their own savings and investment decisions, especially for retirement. In the US and Europe, for example, company-managed pension plans are giving way to those where employees are in charge of their own retirement money. In Singapore too, the government is encouraging individuals to take a more active role in their own retirement planning. Research by Wharton insurance and risk management professor Olivia Mitchell and Singapore Management University finance professor Benedict Koh shows, however, that people are not well-equipped to handle such investment decisions.
Time Magazine Education Program (38 Pedagogical Articles/Worksheets In A Year; Samples Uploaded), Siow Heng Ong
Time Magazine Education Program (38 Pedagogical Articles/Worksheets In A Year; Samples Uploaded), Siow Heng Ong
Research Collection Lee Kong Chian School Of Business
No abstract provided.
Efficient Optimistic Fair Exchange Secure In The Multi-User Setting And Chosen-Key Model Without Random Oracles, Qiong Huang, Guomin Yang, Duncan S. Wong, Willy Susilo
Efficient Optimistic Fair Exchange Secure In The Multi-User Setting And Chosen-Key Model Without Random Oracles, Qiong Huang, Guomin Yang, Duncan S. Wong, Willy Susilo
Research Collection School Of Computing and Information Systems
Optimistic fair exchange is a kind of protocols to solve the problem of fair exchange between two parties. Almost all the previous work on this topic are provably secure only in the random oracle model. In PKC 2007, Dodis et al. considered optimistic fair exchange in a multi-user setting, and showed that the security of an optimistic fair exchange in a single-user setting may no longer be secure in a multi-user setting. Besides, they also proposed one and reviewed several previous construction paradigms and showed that they are secure in the multi-user setting. However, their proofs are either in the …
Multicultural Experience Enhances Creativity: The When And How, Angela K. Y. Leung, William W. Maddux, Adam D. Galinsky, Chi-Yue Chiu
Multicultural Experience Enhances Creativity: The When And How, Angela K. Y. Leung, William W. Maddux, Adam D. Galinsky, Chi-Yue Chiu
Research Collection School of Social Sciences
Many practices aimed at cultivating multicultural competence in educational and organizational settings (e.g., exchange programs, diversity education in college, diversity management at work) assume that multicultural experience fosters creativity. In line with this assumption, the research reported in this article is the first to empirically demonstrate that exposure to multiple cultures in and of itself can enhance creativity. Overall, the authors found that extensiveness of multicultural experiences was positively related to both creative performance (insight learning, remote association, and idea generation) and creativity-supporting cognitive processes (retrieval of unconventional knowledge, recruitment of ideas from unfamiliar cultures for creative idea expansion). Furthermore, …
Rate-Diversity And Resource-Aware Broadcast And Multicast In Multi-Rate Wireless Mesh Networks, Bao Hua Liu, Chun Tung Chou, Archan Misra, Sanjay Jha
Rate-Diversity And Resource-Aware Broadcast And Multicast In Multi-Rate Wireless Mesh Networks, Bao Hua Liu, Chun Tung Chou, Archan Misra, Sanjay Jha
Research Collection School Of Computing and Information Systems
This paper focuses on the problem of increasing the traffic capacity (volume of admissible traffic) of broadcast and multicast flows in a wireless mesh network (WMN). We study and suggest routing strategies where the process of constructing the forwarding tree considers three distinct features: (a) the ability of individual mesh nodes to perform link-layer broadcasts at multiple rates, (b) the wireless broadcast advantage, whereby a single broadcast transmission covers multiple neighboring receivers and (c) the residual transmission capacity at a WMN node, subject to intereference-based constraints from existing traffic flows in its neighborhood. Our metric of interest is the total …
K-Sketch: A 'Kinetic' Sketch Pad For Novice Animators, Richard C. Davis, Brien Colwell, James A. Landay
K-Sketch: A 'Kinetic' Sketch Pad For Novice Animators, Richard C. Davis, Brien Colwell, James A. Landay
Research Collection School Of Computing and Information Systems
Because most animation tools are complex and timeconsuming to learn and use, most animations today are created by experts. To help novices create a wide range of animations quickly, we have developed a general-purpos informal, 2D animation sketching system called K-Sketch. Field studies investigating the needs of animatorsnd would-be animators helped us collect a library of usage scenarios for our tool. A novel optimization technique enabled us to design an interface that is simultaneously fast, simple, and powerful. The result is a pen-based system that relies on users’ intuitive sense of space and time while still supporting a wide range …
Building A Web Of Trust Without Explicit Trust Ratings, Young Ae Kim, Minh-Tam Le, Hady W. Lauw, Ee Peng Lim, Haifeng Liu, Jaideep Srivastava
Building A Web Of Trust Without Explicit Trust Ratings, Young Ae Kim, Minh-Tam Le, Hady W. Lauw, Ee Peng Lim, Haifeng Liu, Jaideep Srivastava
Research Collection School Of Computing and Information Systems
A satisfactory and robust trust model is gaining importance in addressing information overload, and helping users collect reliable information in online communities. Current research on trust prediction strongly relies on a web of trust, which is directly collected from users based on previous experience. However, the web of trust is not always available in online communities and even though it is available, it is often too sparse to predict the trust value between two unacquainted people with high accuracy. In this paper, we propose a framework to derive degree of trust based on users' expertise and users' affinity for certain …
How Does Vietnam's Accession To The World Trade Organization Change The Spatial Incidence Of Poverty?, Tomoki Fujii, David Roland-Holst
How Does Vietnam's Accession To The World Trade Organization Change The Spatial Incidence Of Poverty?, Tomoki Fujii, David Roland-Holst
Research Collection School Of Economics
Trade liberalization is good for growth, and growth is good for the poor. This argument is simple but powerful. It has served as the departure point for discussion of the link between trade and poverty among economists and policy-makers, regardless of whether and to what extent they buy this argument. Krueger (1998) considers the inefficiencies that import substitution strategy creates and argues that trade liberalization undertaken at a period of low or negative growth rates can normally lead to a period of higher growth rates. Bhagwati and Srinivasan (2002) emphasize the empirical evidence of China and India. That is, these …
Corruption, Delays, And The Pattern Of Trade, Quoc-Anh Do, Karine Serfaty-De Medeiros
Corruption, Delays, And The Pattern Of Trade, Quoc-Anh Do, Karine Serfaty-De Medeiros
Research Collection School Of Economics
We argue that corruption deters international trade by causing delays in exporting and importing, both at customs and in other required administrative procedures. We study three manifestations of corruption as a barrier to trade. The corruption effect is both significant and economically sizeable. We first show the negative relationship between the exporters and importers levels of corruption and trade volumes at the country level in a gravity framework. This country-level effect implies that a standard deviation increase in the exporters corruption level causes a 27% drop in exports. We then show that corruption indeed operates through delays: we establish that …
Benefiting From Customer And Competitor Knowledge: A Market-Based Approach To Organisational Learning, Siu Loon Hoe
Benefiting From Customer And Competitor Knowledge: A Market-Based Approach To Organisational Learning, Siu Loon Hoe
Research Collection School Of Computing and Information Systems
PurposeThe purpose of this paper is to review the organizational learning, market orientation and learning orientation concepts, highlight the importance of market knowledge to organizational learning and recommend ways in adopting a market‐based approach to organizational learning.Design/methodology/approachThe extant organizational learning and market orientation literature was reviewed, and the salient points on how adopting a market‐based approach to organizational learning promotes competitive advantage are discussed.FindingsOrganizational behavior scholars have devoted a lot attention on the factors and conditions affecting organizational learning. The end outcome, of course, is to improve organizational performance. Marketing scholars, on the other, focused on the effect of market …
Which Shorts Are Informed?, Ekkehart Boehmer, Charles M. Jones, Xiaoyan Zhang
Which Shorts Are Informed?, Ekkehart Boehmer, Charles M. Jones, Xiaoyan Zhang
Research Collection Lee Kong Chian School Of Business
We construct a long daily panel of short sales using proprietary NYSE order data. From 2000 to 2004, shorting accounts for more than 12.9% of NYSE volume, suggesting that shorting constraints are not widespread. As a group, these short sellers are well informed. Heavily shorted stocks underperform lightly shorted stocks by a risk-adjusted average of 1.16% over the following 20 trading days (15.6% annualized). Institutional nonprogram short sales are the most informative; stocks heavily shorted by institutions underperform by 1.43% the next month (19.6% annualized). The results indicate that, on average, short sellers are important contributors to efficient stock prices.
Asymmetric Information And Conglomerate Discount: Evidence From Spinoffs, Charlie Charoenwong, Kuan Yong David Ding, Jing Pan
Asymmetric Information And Conglomerate Discount: Evidence From Spinoffs, Charlie Charoenwong, Kuan Yong David Ding, Jing Pan
Research Collection Lee Kong Chian School Of Business
The existing literature argues that diversified firms may be undervalued due to the information asymmetry between a firm's management and the market. Splitting the firm's divisions into multiple business components is thought to facilitate the market valuation of each component more accurately. We investigate the information hypothesis from corporate spinoffs from 1981 through 2004. We use the post-spinoff data to reconstruct the diversified firm, assess the improvement in value at the combined firm level, and relate the value improvement to the change in the level of information asymmetry. We find that, prior to the spinoff, the sample firms have significantly …
Smu Students Forum Explores Why Poverty Persists In Asia And How Individuals Can Make A Difference: Part 2, Knowledge@Smu
Smu Students Forum Explores Why Poverty Persists In Asia And How Individuals Can Make A Difference: Part 2, Knowledge@Smu
Knowledge@SMU
The Singapore Management University (SMU) chapter of AIESEC, a worldwide student organisation, together with SMU Broadcast and Entertainment hosted a panel discussion in February 2007 on the topic, “Why does poverty continue to exist in Asia and what can society do about it?” Part 2 of this two-part article provides edited excerpts of presentations by John Donaldson, SMU; Michael Switow, One Singapore and SUPERSEED; and Peter Stephens, World Bank. The panel moderator was SMU law professor Eugene Tan.
When You Are Sinking Become A Submarine: How To Win Through Wisdom And Creativity, Knowledge@Smu
When You Are Sinking Become A Submarine: How To Win Through Wisdom And Creativity, Knowledge@Smu
Knowledge@SMU
Vivekacharya Pavan Choudhary comes across as a somewhat paradoxical figure with his sage like contemplations on the one hand, and impeccable corporate credentials on the other. Author of the book, When You Are Sinking Become a Submarine, Choudhary is also CEO of Vygon India, a French multinational pharmaceutical company. At a recent Lien Fung's Colloquium held at the Singapore Management University, Choudhary shared his own philosophical insights on winning through wisdom and creativity, and how to be successful without compromising on 'goodness'.
A Cross-Nations, Cross-Cultures, And Cross-Conditions Analysis On The Equivalence Of The Balanced Inventory Of Desirable Responding (Bidr), Andrew Li, Jochen Reb
A Cross-Nations, Cross-Cultures, And Cross-Conditions Analysis On The Equivalence Of The Balanced Inventory Of Desirable Responding (Bidr), Andrew Li, Jochen Reb
Research Collection Lee Kong Chian School Of Business
This article examines measurement equivalence of the Balanced Inventory of Desirable Responding (BIDR) across two nations (the United States and Singapore), two cultural values (horizontal individualism and horizontal collectivism) and two motivational conditions (standard and faking). One sample of undergraduate students from each country (N Singapore = 158, N United States = 166) participated in this study, and a within-subject experimental design is used. Specifically, at Time 1, participants were simply asked to respond to the BIDR and the INDCOL (standard condition). At Time 2, the participants were instructed to engage in social desirability (faking condition). Multigroup confirmatory factor analyses …
Asymptotic Variance And Extensions Of A Denisty-Weighted-Response Semiparametric Estimator, Myoung-Jae Lee, Fali Huang, Young-Sook Kim
Asymptotic Variance And Extensions Of A Denisty-Weighted-Response Semiparametric Estimator, Myoung-Jae Lee, Fali Huang, Young-Sook Kim
Research Collection School Of Economics
Building on some early works, Lewbel (2000) proposed estimators for binary and ordered discrete response models with endogenous regressors. These estimators have been extended for panel data and for truncated and censored models by later papers. The estimators are particularly innovative in that the latent linear regression functions are pulled out of the nonlinear limited dependent variable models, which are then treated as if they were the usual linear models. But understanding the estimators and their applications have been “hampered” by less-than-ideal expositions and assumptions. For this problem, this short note reviews the estimators and makes the following three points. …
The Relative Importance Of Task, Citizenship And Counterproductive Performance To Job Performance Ratings: Do Rater Source And Team-Based Culture Matter?, Filip Lievens, James M. Conway, Wilfried De Corte
The Relative Importance Of Task, Citizenship And Counterproductive Performance To Job Performance Ratings: Do Rater Source And Team-Based Culture Matter?, Filip Lievens, James M. Conway, Wilfried De Corte
Research Collection Lee Kong Chian School Of Business
This study contributes to our understanding of which factors predict raters' policies for combining performance components into an overall job performance rating. We used a work-roles framework to examine the effects of rater source and team-based culture. The sample consisted of 612 individuals in three job categories (3 17 nurses, 168 personnel recruiters and 127 sales representatives). Respondents rated employee performance profiles that were described on task, citizenship and counterproductive performance. Raters' weights differed by (a) organizational culture (low- vs. high-team-based); (b) rating source (supervisor vs. peer) and (c) job. In a team-based culture, more weight was given to citizenship …
A Closer Look At The Frame-Of-Reference Effect In Personality Scale Scores And Validity, Filip Lievens, Wifiried De Corte, Eveline Schollaert
A Closer Look At The Frame-Of-Reference Effect In Personality Scale Scores And Validity, Filip Lievens, Wifiried De Corte, Eveline Schollaert
Research Collection Lee Kong Chian School Of Business
This article contributes to the understanding of why the use of a frame-of-reference leads to increased criterion-related validity of personality inventories. Two competing explanations are described and tested. A between-subjects (N = 337) and a within-subject (N = 105) study are conducted to test the hypothesized effects of use of a frame of reference on reliability and validity. Regarding the effects on reliability, use of a frame of reference reduces within-person inconsistency (instead of between-person variability) in responding to generic items. Use of a frame of reference further leads to higher validity as a result of the reduction of between-person …
Testing Intergroup Concordance In Ranking Experiments With Two Groups Of Judges, Dawn J. Dekle, Leung, Denis H. Y., Min Zhu
Testing Intergroup Concordance In Ranking Experiments With Two Groups Of Judges, Dawn J. Dekle, Leung, Denis H. Y., Min Zhu
Research Collection School Of Economics
Across many areas of psychology, concordance is commonly used to measure the (intragroup) agreement in ranking a number of items by a group of judges. Sometimes, however, the judges come from multiple groups, and in those situations, the interest is to measure the concordance between groups, under the assumption that there is some within-group concordance. In this investigation, existing methods are compared under a variety of scenarios. Permutation theory is used to calculate the error rates and the power of the methods. Missing data situations are also studied. The results indicate that the performance of the methods depend on (a) …
Harmoni: Context-Aware Filtering Of Sensor Data For Continuous Remote Health Monitoring, Iqbal Mohomed, Archan Misra, Maria Ebling, William Jerome
Harmoni: Context-Aware Filtering Of Sensor Data For Continuous Remote Health Monitoring, Iqbal Mohomed, Archan Misra, Maria Ebling, William Jerome
Research Collection School Of Computing and Information Systems
A promising architecture for remote healthcare monitoring involves the use of a pervasive device (such as a cellular phone), which aggregates data from multiple body-worn medical sensors and transmits the data to the backend. Unfortunately, the volume of data generated by increasingly sophisticated continuouslyactive sensors can overwhelm the resources on the mobile device. We propose imbuing the mobile device with the intelligence to perform context-aware filtering of sensor data streams in order to reduce transmissions in cases where the observed data corresponds to the norm expected by the system in a given context. To investigate the efficacy of this technique, …
Using The Economic Concept Of A 'Merit Good' To Justify The Teaching Of Ethics Across The University Curriculum, Mark Nowacki, Wilfried Ver Eecke
Using The Economic Concept Of A 'Merit Good' To Justify The Teaching Of Ethics Across The University Curriculum, Mark Nowacki, Wilfried Ver Eecke
Research Collection School of Social Sciences
What follows is an argument that can be used to justify the introduction of philosophical, and specifically ethical, discourse into a wide range of university courses. The argument advanced is, we hope, both sufficiently formal to convince administrators, and sufficiently broad to convince students, of the practical importance that at least one area of philosophy has for the successful pursuit of even the most praxis-oriented career.
On Changes In Rural China: The Rise Of Agrarian Capitalism And Dissolution Of The Peasantry In Contemporary China, Forrest Zhang, John A. Donaldson
On Changes In Rural China: The Rise Of Agrarian Capitalism And Dissolution Of The Peasantry In Contemporary China, Forrest Zhang, John A. Donaldson
Research Collection School of Social Sciences
For decades, Mr. Hong and his family have toiled the ground of Dounan Village, an area of Yunnan Province that became well-known throughout China for the quality of its fresh vegetables. While Hong and his neighbors have, since the early 1980s, concentrated on the small plot of land that the state allocated to them, in recent years, Dounan village has begun producing vegetables in large enough scale to market to distant, wealthy coastal areas, bringing new-found prosperity to the area. After gaining experience producing vegetables both on the plot that the government allocated to his family, and on his neighbors’ …
Testing Structural Change In Time-Series Nonparametric Regression Models, Liangjun Su, Zhijie Xiao
Testing Structural Change In Time-Series Nonparametric Regression Models, Liangjun Su, Zhijie Xiao
Research Collection School Of Economics
We propose a CUSUM type of test for structural change in dynamic nonparametric regression models. It is based upon the cumulative sums of weighted residuals from a single nonparametric regression and complements the conventional parameter instability tests in parametric models. We derive the limiting distributions of the test under both the null hypothesis and sequences of local alternatives. A boot-strap procedure is also proposed and its validity is justified. Finally, simulation experiments are conducted to investigate the finite sample properties of our test.