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Articles 7081 - 7110 of 8681
Full-Text Articles in Entire DC Network
Treating Words As Data With Error: Uncertainty In Text Statements Of Policy Positions, Kenneth Benoit, Michael Laver, Slava Mikhaylov
Treating Words As Data With Error: Uncertainty In Text Statements Of Policy Positions, Kenneth Benoit, Michael Laver, Slava Mikhaylov
Research Collection School of Social Sciences
Political text offers extraordinary potential as a source of information about the policy positions of political actors. Despite recent advances in computational text analysis, human interpretative coding of text remains an important source of text-based data, ultimately required to validate more automatic techniques. The profession's main source of cross-national, time-series data on party policy positions comes from the human interpretative coding of party manifestos by the Comparative Manifesto Project (CMP). Despite widespread use of these data, the uncertainty associated with each point estimate has never been available, undermining the value of the dataset as a scientific resource. We propose a …
Extreme Events And The Copula Pricing Of Commercial Mortgage-Backed Securities, Zhanyong Liu, Gang-Zhi Fan, Kian Guan Lim
Extreme Events And The Copula Pricing Of Commercial Mortgage-Backed Securities, Zhanyong Liu, Gang-Zhi Fan, Kian Guan Lim
Research Collection Lee Kong Chian School Of Business
Commercial mortgage-backed securities (CMBS), as a portfolio-based financial product, have gained great popularity in financial markets. This paper extends Childs, Ott and Riddiough’s (J Financ Quant Anal, 31(4), 581–603, 1996) model by proposing a copula-based methodology for pricing CMBS bonds. Default on underlying commercial mortgages within a pool is a crucial risk associated with CMBS transactions. Two important issues associated with such default—extreme events and default dependencies among the mortgages—have been identified to play crucial roles in determining credit risk in the pooled commercial mortgage portfolios. This article pays particular attention to these two issues in pricing CMBS bonds. Our …
Efficient Mining Of Closed Repetitive Gapped Subsequences From A Sequence Database, Bolin Ding, David Lo, Jiawei Han, Siau-Cheng Khoo
Efficient Mining Of Closed Repetitive Gapped Subsequences From A Sequence Database, Bolin Ding, David Lo, Jiawei Han, Siau-Cheng Khoo
Research Collection School Of Computing and Information Systems
There is a huge wealth of sequence data available, for example, customer purchase histories, program execution traces, DNA, and protein sequences. Analyzing this wealth of data to mine important knowledge is certainly a worthwhile goal. In this paper, as a step forward to analyzing patterns in sequences, we introduce the problem of mining closed repetitive gapped subsequences and propose efficient solutions. Given a database of sequences where each sequence is an ordered list of events, the pattern we would like to mine is called repetitive gapped subsequence, which is a subsequence (possibly with gaps between two successive events within it) …
Beyond Output Voting: Detecting Compromised Replicas Using Hmm-Based Behavioral Distance, Debin Gao, Michael K. Reiter, Dawn Song
Beyond Output Voting: Detecting Compromised Replicas Using Hmm-Based Behavioral Distance, Debin Gao, Michael K. Reiter, Dawn Song
Research Collection School Of Computing and Information Systems
Many host-based anomaly detection techniques have been proposed to detect code-injection attacks on servers. The vast majority, however, are susceptible to "mimicry" attacks in which the injected code masquerades as the original server software, including returning the correct service responses, while conducting its attack. "Behavioral distance," by which two diverse replicas processing the same inputs are continually monitored to detect divergence in their low-level (system-call) behaviors and hence potentially the compromise of one of them, has been proposed for detecting mimicry attacks. In this paper, we present a novel approach to behavioral distance measurement using a new type of hidden …
Limit Theory For Cointegrated Systems With Moderately Integrated And Moderately Explosive Regressors, Tassos Magdalinos, Peter C. B. Phillips
Limit Theory For Cointegrated Systems With Moderately Integrated And Moderately Explosive Regressors, Tassos Magdalinos, Peter C. B. Phillips
Research Collection School Of Economics
An asymptotic theory is developed for multivariate regression in cointegrated systems whose variables are moderately integrated or moderately explosive in the sense that they have autoregressive roots of the form rho(ni) = 1 + c(i)/n(alpha), involving moderate deviations from unity when alpha is an element of (0, 1) and c(i) is an element of R are constant parameters. When the data are moderately integrated in the stationary direction (with c(i) < 0), it is shown that least squares regression is consistent and asymptotically normal but suffers from significant bias, related to simultaneous equations bias. In the moderately explosive case (where c(i) > 0) the limit theory is mixed normal with Cauchy-type tail behavior, and the rate of convergence is explosive, as in the case of a moderately explosive scalar autoregression (Phillips and …
Rsa-Based Certificateless Public Key Encryption, Junzuo Lai, Robert H. Deng, Shengli Liu, Weidong Kou
Rsa-Based Certificateless Public Key Encryption, Junzuo Lai, Robert H. Deng, Shengli Liu, Weidong Kou
Research Collection School Of Computing and Information Systems
Certificateless Public Key Cryptography was first introduced by Al-Riyami and Paterson in order to eliminate the inherent key-escrow problem of Identity-Based Cryptography. In this paper, we present a new practical construction of certificateless public key encryption scheme without paring. Our scheme is, in the random oracle model, provably secure under the assumption that the RSA problem is intractable.
How To Distinguish Smart Big Moves From Stupid Ones, Paul Strebel, Anne-Valerie Ohlsson-Corboz
How To Distinguish Smart Big Moves From Stupid Ones, Paul Strebel, Anne-Valerie Ohlsson-Corboz
Research Collection Lee Kong Chian School Of Business
When top executives undertake big moves – dramatic shifts in strategic direction – their decisions can make or break a company. This paper aims to offer a methodology for cutting the risks of making a catastrophic misstep. To avoid a corporate disaster and increase the chances of a smart and ultimately successful big move the paper raises six critical questions that must be answered honestly and unequivocally by managers. The research indicates that there are five classic types of big move, each corresponding to a different position on the corporate performance curve: finding a new game; going for growth; getting …
Tapping The Grapevine: A Closer Look At Word-Of-Mouth As A Recruitment Source, Greet Van Hoye, Filip Lievens
Tapping The Grapevine: A Closer Look At Word-Of-Mouth As A Recruitment Source, Greet Van Hoye, Filip Lievens
Research Collection Lee Kong Chian School Of Business
To advance knowledge of word-of-mouth as a company-independent recruitment source, this study draws on conceptualizations of word-of-mouth in the marketing literature. The sample consisted of 612 potential applicants targeted by the Belgian Defense. Consistent with the recipient-source framework, time spent receiving positive word-of-mouth was determined by the traits of the recipient (extraversion and conscientiousness), the characteristics of the source (perceived expertise), and their mutual relationship (tie strength). Only conscientiousness and source expertise were determinants of receiving negative word-of-mouth. In line with the accessibility-diagnosticity model, receiving positive employment information through word-of-mouth early in the recruitment process was positively associated with perceptual …
House Of Cards, M. Thulasidas
House Of Cards, M. Thulasidas
Research Collection School Of Computing and Information Systems
We are in dire straits - no doubt about it. Our banks and financial edifices are collapsing. Those left standing also look shaky. The financial industry as a whole is battling to survive. And, as its frontline warriors, we will bear the brunt of the blood- bath sure to ensue any minute now. A good opportunity to play solitaire?
Continuous Visible Nearest Neighbour Queries, Yunjun Gao, Baihua Zheng, Wang-Chien Lee, Gencai Chen
Continuous Visible Nearest Neighbour Queries, Yunjun Gao, Baihua Zheng, Wang-Chien Lee, Gencai Chen
Research Collection School Of Computing and Information Systems
In this paper, we identify and solve a new type of spatial queries, called continuous visible nearest neighbor (CVNN) search. Given a data set P, an obstacle set O, and a query line segment q, a CVNN query returns a set of (p, R) tuples such that p ? P is the nearest neighbor (NN) to every point r along the interval R ? q as well as p is visible to r. Note that p may be NULL, meaning that all points in P are invisible to all points in R, due to the obstruction of some obstacles in …
Web Query Recommendation Via Sequential Query Prediction, Qi He, Daxin Jiang, Zhen Liao, Steven C. H. Hoi, Kuiyu Chang, Ee Peng Lim, Hang Li
Web Query Recommendation Via Sequential Query Prediction, Qi He, Daxin Jiang, Zhen Liao, Steven C. H. Hoi, Kuiyu Chang, Ee Peng Lim, Hang Li
Research Collection School Of Computing and Information Systems
Web query recommendation has long been considered a key feature of search engines. Building a good Web query recommendation system, however, is very difficult due to the fundamental challenge of predicting users' search intent, especially given the limited user context information. In this paper, we propose a novel "sequential query prediction" approach that tries to grasp a user's search intent based on his/her past query sequence and its resemblance to historical query sequence models mined from massive search engine logs. Different query sequence models were examined, including the naive variable length N-gram model, Variable Memory Markov (VMM) model, and our …
Final Stage Development Of The Integrated Crisis Mapping (Icm) Model In Crisis Communication: The Myth Of Low Engagement In Crisis, A. Pang, Yan Jin, Glen T. Cameron
Final Stage Development Of The Integrated Crisis Mapping (Icm) Model In Crisis Communication: The Myth Of Low Engagement In Crisis, A. Pang, Yan Jin, Glen T. Cameron
Research Collection Lee Kong Chian School Of Business
Extending current theories in crisis communication, the authors have developed a more systemic approach to understanding the role of emotions. The Integrated Crisis Mapping (ICM) model is based on a public-based, emotion-driven perspective where different crises are mapped on two continua, the organization’s engagement in the crisis and primary public’s coping strategy. This final-stage testing, representing the sixth in the series, found that even though organizations need not be highly engaged in crises relating to human resource, transport failure and security issues, they were galvanized to engage in action-based stance by situational factors like external threats. The fact that the …
Cue Usage In Financial Statement Fraud Risk Assessments: Effects Of Technical Knowledge And Decision Aid Use, Jean Lin Seow
Cue Usage In Financial Statement Fraud Risk Assessments: Effects Of Technical Knowledge And Decision Aid Use, Jean Lin Seow
Research Collection School Of Accountancy
This paper investigates the effects of technical knowledge and decision aid use on financial statement fraud risk assessments made by directors and students. More extreme fraud risk assessments are made when participants identify and process larger (smaller) numbers of diagnostic (non-diagnostic) factors, with technical knowledge driving diagnostic factor identification. Significant decision aid-technical knowledge effects are also found; decision aid use has a detrimental effect on high-knowledge directors while improving performance in inexperienced, low-knowledge students. These results suggest that although decision aids can afford gains in performance in inexperienced users, they can have unintended and/or paradoxical behavioural effects on experienced users.
The Association Between Institutional Ownership And Audit Properties, Soongsoo Han, Tony Kang, Lynn Reesc
The Association Between Institutional Ownership And Audit Properties, Soongsoo Han, Tony Kang, Lynn Reesc
Research Collection School Of Accountancy
In this study, we examine how institutional ownership affects the quality and riskiness of the financial statement audit. We hypothesize that institutional investors can influence corporate policy to employ governance mechanisms that reduce their monitoring costs. Our evidence shows that firms are more likely to hire a Big 4 auditor (our proxy for audit quality) when long-term institutional ownership is high, suggesting that long-term institutional investors view high quality audits as a viable means of improving corporate governance while reducing their direct monitoring costs. We find no association between auditor choice and short-term institutional ownership. Next, we find that auditors …
Misaligned Incentives And Mortgage Lending In Asia, Richard Green, Roberto S. Mariano, Andrey Pavlov, Susan Wachter
Misaligned Incentives And Mortgage Lending In Asia, Richard Green, Roberto S. Mariano, Andrey Pavlov, Susan Wachter
Research Collection School Of Economics
This paper provides a conceptual basis for the price discovery potential for tradable market instruments and specifically the development of mortgage securitization in Asia and the potential dangers of such markets. Nonetheless we argue for the potential importance of securitization in Asia because of its possible role in increasing transparency of the financial sector of Asian economies. We put forth a model explaining how misaligned incentives can lead to bank generated real estate crashes and macroeconomic instability, with or without securitization under certain circumstances. We examine the banking sector’s performance in Asia compared to securitized real estate returns, to provide …
Testing Conditional Uncorrelatedness, Liangjun Su, Aman Ullah
Testing Conditional Uncorrelatedness, Liangjun Su, Aman Ullah
Research Collection School Of Economics
We propose a nonparametric test for conditional uncorrelatedness in multiple-equation models such as seemingly unrelated regressions (SURs), multivariate volatility models, and vector autoregressions (VARs). Under the null hypothesis of conditional uncorrelatedness, the test statistic converges to the standard normal distribution asymptotically. We also study the local power property of the test. Simulation shows that the test behaves quite well in finite samples.
Intergenerational Earnings Mobility In Singapore And The United States, Irene Y. H. Ng, Xiaoyi Shen, Kong Weng Ho
Intergenerational Earnings Mobility In Singapore And The United States, Irene Y. H. Ng, Xiaoyi Shen, Kong Weng Ho
Research Collection School Of Economics
This study compared intergenerational earnings mobility in Singapore and the United States by replicating the sample criteria in the Singapore National Youth Survey on the U.S. Panel Study of Income Dynamics. The mean estimated earnings elasticities are almost identical: 0.26 in Singapore and 0.28 in the United States. Transformed to 0.44 and 0.47 respectively to reflect permanent status, mobility in the two countries is moderately low compared internationally. The finding of similar mobility is not surprising given that the two countries have similar economic realities, welfare systems, education regimes, and labor structures. Policy makers face the daunting challenge of overcoming …
The Impact Of The Options Backdating Scandal On Shareholders, Gennaro Bernile, Gregg Jarrell
The Impact Of The Options Backdating Scandal On Shareholders, Gennaro Bernile, Gregg Jarrell
Research Collection Lee Kong Chian School Of Business
The revelation that scores of firms engaged in the illegal manipulation of stock options’ grant dates (i.e. “backdating”) captured much public attention. The evidence indicates that the consequences stemming from management misconduct and misrepresentation are of first-order importance in this context as shareholders of firms accused of backdating experience large negative, statistically significant abnormal returns. Furthermore, shareholders’ losses are directly related to firms’ likely culpability and the magnitude of the resulting restatements, despite the limited cash flow implications. And, tellingly, the losses are attenuated when tainted management of less successful firms is more likely to be replaced and relatively many …
The Efficiency Of Friendliness: Japanese Corporate Governance Succeeds Again Without Hostile Takeovers, Dan W. Puchniak
The Efficiency Of Friendliness: Japanese Corporate Governance Succeeds Again Without Hostile Takeovers, Dan W. Puchniak
Research Collection Yong Pung How School Of Law
It is widely assumed that hostile takeovers are a prerequisite for an efficient system of corporate governance. This assumption is false. Since the new millennium, Japan has transformed itself from being on the brink of one of the largest economic meltdowns in modern economic history to currently being in the midst of its longest period of postwar economic expansion (2002-2007). This astounding recovery was achieved without a single successful hostile takeover of a major Japanese company. True to its postwar tradition, corporate Japan has successfully restructured through government intervention, bank-driven reallocation of capital, and orchestrated and friendly mergers — the …
Second Stage Development Of The Integrated Crisis Mapping (Icm) Model In Crisis Communication: Organizational Strategies For Crises That Require High And Low Organizational Engagements, Augustine Pang, Yan Jin, Glen T. Cameron
Second Stage Development Of The Integrated Crisis Mapping (Icm) Model In Crisis Communication: Organizational Strategies For Crises That Require High And Low Organizational Engagements, Augustine Pang, Yan Jin, Glen T. Cameron
Research Collection Lee Kong Chian School Of Business
Extending current theories in crisis communication, the authors have developed a moresystemic approach to understanding the role of emotions. The Integrated Crisis Mapping (ICM)model is based on a public-based, emotion-driven perspective where different crises aremapped on two continua, the organization’s engagement in the crisis and primary public’scoping strategy. This second-stage testing, representing the fourth in the series, found that ontop of discovering anxiety as a possible default emotion that publics feel in crises in an earlierstudy, the default response organizations embroiled in crises involving hostile takeovers,accidents, natural disasters, CEO retirement, rumor, and psychopathic acts, tend to adopt isqualified rhetoric-mix stance …
Information Disclosure, Risk Trading And The Nature Of Derivative Instruments: From Common Law Perspective, Christopher Chao-Hung Chen
Information Disclosure, Risk Trading And The Nature Of Derivative Instruments: From Common Law Perspective, Christopher Chao-Hung Chen
Research Collection Yong Pung How School Of Law
This paper explores issues of pre-contractual disclosure for derivative instruments, of which this paper describes as contracts to trade risks, in the UK and US. While there is no general duty of disclosure in common law, this paper focuses on whether there should be a duty of disclosure for derivative instruments by comparing with securities law and insurance law. This paper argues that mandatory disclosure in the securities market cannot be extended to exchange-traded futures contracts (save where securities are involved) because of the nature of securities. In addition, this paper argues that derivative instruments, though similar to insurance in …
Initial Attraction To Organizations: The Influence Of Trait Inferences, Jerel E. Slaughter, Gary J. Greguras
Initial Attraction To Organizations: The Influence Of Trait Inferences, Jerel E. Slaughter, Gary J. Greguras
Research Collection Lee Kong Chian School Of Business
Organization personality perceptions have been defined as the set of personality characteristics associated with organizations. Previous research supports five distinct factors of organization personality perceptions: Boy Scout, Innovativeness, Dominance, Thrift, and Style. The purpose of this research was to understand how individuals' initial attraction to firms is influenced by their perceptions of the degree to which firms display these traits. Results of the present investigation indicated that organization personality perceptions accounted for significant variance in initial organizational attraction, after controlling for perceptions of the degree to which the jobs at the organizations offer traditional attributes. In addition, several self-rated Big …
Compromising On Consideration In Singapore: Gay Choon Ing V Loh Sze Ti Terence Peter, Yihan Goh
Compromising On Consideration In Singapore: Gay Choon Ing V Loh Sze Ti Terence Peter, Yihan Goh
Research Collection Yong Pung How School Of Law
It is not often that a judgment contains a reference to Aristotle’s work or a coda at its conclusion. The recent Singapore Court of Appeal judgment of Gay Choon Ing v Loh Sze Ti Terence Peter (delivered by Andrew Phang JA) contained both, the latter of which an extensive judicial exposition on the difficulties (and tentative solutions) relating to the contractual doctrine of consideration. This re-evaluation of consideration at the slightest opportunity is unsurprising, given the conceptual problems that have afflicted the doctrine.There have been various judicial solutions, generally capable of classification into two distinct types: first, through an internal …
Pat: Towards Flexible Verification Under Fairness, Jun Sun, Yang Liu, Jin Song Dong, Jun Pang
Pat: Towards Flexible Verification Under Fairness, Jun Sun, Yang Liu, Jin Song Dong, Jun Pang
Research Collection School Of Computing and Information Systems
Recent development on distributed systems has shown that a variety of fairness constraints (some of which are only recently defined) play vital roles in designing self-stabilizing population protocols. Current practice of system analysis is, however, deficient under fairness. In this work, we present PAT, a toolkit for flexible and efficient system analysis under fairness. A unified algorithm is proposed to model check systems with a variety of fairness effectively in two different settings. Empirical evaluation shows that PAT complements existing model checkers in terms of fairness. We report that previously unknown bugs have been revealed using PAT against systems functioning …
Is Technology The Answer To Content Protection In The Digital Era?, Knowledge@Smu
Is Technology The Answer To Content Protection In The Digital Era?, Knowledge@Smu
Knowledge@SMU
Content owners have to walk a fine line between meeting the needs of consumers and protecting their content from piracy and maximising the profitability of their products, said Isa Seow, director of technology initiatives in the Asia Pacific for the Motion Picture Association (MPA). Seow was the featured speaker at a Wee Kim Wee Centre-sponsored talk in October 2008.
Desert Heat Island Study In Winter By Mobile Transect And Remote Sensing Techniques, Chen-Yi Sun, Anthony J. Brazel, Winston T. L. Chow, Brent C. Hedquist, Lela Prashad
Desert Heat Island Study In Winter By Mobile Transect And Remote Sensing Techniques, Chen-Yi Sun, Anthony J. Brazel, Winston T. L. Chow, Brent C. Hedquist, Lela Prashad
Research Collection School of Social Sciences
A familiar problem in urban environments is the urban heat island (UHI), which potentially increases air conditioning demands, raise pollution levels, and could modify precipitation patterns. The magnitude and pattern of UHI effects have been major concerns of a lot of urban environment studies. Typically, research on UHI magnitudes in arid regions (such as Phoenix, AZ, USA) focuses on summer. UHI magnitudes in Phoenix (more than three million population) attain values in excess of 5°C. This study investigated the early winter period—a time when summer potential evapotranspiration >250 mm has diminished to 8.0°C, comparable to summertime UHI conditions. Through analysis …
Managing Information Technology Project Escalation And De-Escalation: An Approach-Avoidance Perspective, Gary Pan, Shan Ling Pan, Michael Newman
Managing Information Technology Project Escalation And De-Escalation: An Approach-Avoidance Perspective, Gary Pan, Shan Ling Pan, Michael Newman
Research Collection School Of Accountancy
This paper presents an integrated theoretical process model for identifying , describing, and analyzing the complex escalation and de-escalation phenomena in software development projects. The approach-avoidance theory is used to integrate core elements of various escalation theories into a holistic, explanatory framework for the two phenomena. We use a process model to identify antecedent conditions, sequences of events, critical incidents, and outcomes over the course of a project. The analysis also operates at multiple levels: project, work, and environment. This highlights the recursive interactions between project, organizational work activities, and their contexts during the software project development process. By conceiving …
Scale-Rotation Invariant Pattern Entropy For Keypoint-Based Near-Duplicate Detection, Wan-Lei Zhao, Chong-Wah Ngo
Scale-Rotation Invariant Pattern Entropy For Keypoint-Based Near-Duplicate Detection, Wan-Lei Zhao, Chong-Wah Ngo
Research Collection School Of Computing and Information Systems
Near-duplicate (ND) detection appears as a timely issue recently, being regarded as a powerful tool for various emerging applications. In the Web 2.0 environment particularly, the identification of near-duplicates enables the tasks such as copyright enforcement, news topic tracking, image and video search. In this paper, we describe an algorithm, namely Scale-Rotation invariant Pattern Entropy (SR-PE), for the detection of near-duplicates in large-scale video corpus. SR-PE is a novel pattern evaluation technique capable of measuring the spatial regularity of matching patterns formed by local keypoints. More importantly, the coherency of patterns and the perception of visual similarity, under the scenario …
Proclaiming Trade Policy: 'Delegated Unilateral Powers' And The Limits On Presidential Unilateral Enactment Of Trade Policy, Brandon Rottinghaus, Elvin T. Lim
Proclaiming Trade Policy: 'Delegated Unilateral Powers' And The Limits On Presidential Unilateral Enactment Of Trade Policy, Brandon Rottinghaus, Elvin T. Lim
Research Collection School of Social Sciences
This article examines presidential proclamations on trade policy, a category of presidential unilateral power that we call delegated unilateral power that is used frequently in creating or modifying trade policy, between the period1974 and 2006 and tests the boundaries of the explanations predicted by the unilateral powers literature. We also find that the use of proclamations on trade policy is independent of the partisan balance in Congress. The use of proclamations modifying policies was the only tactic that comported with predicted actions from the unilateral presidency. Therefore, contrary to the expectations of the unilateral presidency, presidents are not unrestrained political …
The Talent Of Shu: Qiao Ami And The Intellectual World Of Early Medieval Sichuan, Alan Kam Leung Chan
The Talent Of Shu: Qiao Ami And The Intellectual World Of Early Medieval Sichuan, Alan Kam Leung Chan
Research Collection College of Integrative Studies
Portrayals of the intellectual scene of the early medieval Chinese “Sanguo” or “Three States” period (220–280) generally privilege major figures associated with the state of Wei, such as He Yan and Wang Bi, over those who made their mark in Shu (modern Sichuan) and Wu, the other two states contending for the right to rule “all under Heaven” after the demise of the Han dynasty. Michael Farmer sets out to redress this imbalance through a study of the Shu statesman and historian Qiao Zhou (c. 200–270). The book thus harbors a dual purpose, reflected in its title, for in presenting …