Entire DC Network | Open Access Articles | Digital Commons Network™

Social Innovation Challenge Prizes: More Than Just The Money, Laura Bunt

Social Space

Beyond the hype and happiness of winning, when it comes to finding social solutions, innovation prizes are serious business. Laura Buntexplains why.

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Model Selection In Validation Sampling Data: An Asymptotic Likelihood-Based Lasso Approach, Chenlei Leng, Denis H. Y. Leung

Research Collection School Of Economics

We propose an asymptotic likelihood-based LASSO approach for model selection in regression analysis when data are subject to validation sampling. The method makes use of an initial estimator of the regression coefficients and their asymptotic covariance matrix to form an asymptotic likelihood. This ``working'' objective function facilitates the formulation of the LASSO and the implementation of a fast algorithm. Our method circumvents the need to use a likelihood set-up that requires full distributional assumptions about the data. We show that the resulting estimator is consistent in model selection and that the method has lower prediction errors than a model that …

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The Impact Of Transaction Duration, Volume And Direction On Price Dynamics And Volatility, Anthony S. Tay, Christopher Ting, Yiu Kuen Tse, Mitchell Warachka

Research Collection School Of Economics

We explore the role of trade volume, trade direction, and the duration between trades in explaining price dynamics and volatility using an Asymmetric Autoregressive Conditional Duration model applied to intraday transactions data. Our results suggest that volume, direction and duration are important determinants of price dynamics, while duration is also an important determinant of volatility. However, the impact of volume and direction on volatility is marginal after controlling for duration, and the impact of volume on volatility appears to be confined to periods of infrequent trading.

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The Business Model In Practice And Its Implications For Entrepreneurship Research, Gerard George, Adam J. Bock

Research Collection Lee Kong Chian School Of Business

While the term 'business model' has gained widespread use in the practice community, the academic literature on this topic is fragmented and confounded by inconsistent definitions and construct boundaries. In this study, we review prior research and reframe the business model with an entrepreneurial lens. We report on a discourse analysis of 151 surveys of practicing managers to better understand their conceptualization of a business model. We find that the underlying dimensions of the business model are resource structure, transactive structure, and value structure, and discuss the nature and implications of dimensional dominance for firm characteristics and behavior. These findings …

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Trust Building, Diagnosis, And Repair In The Context Of Negotiation, Donald L. Ferrin, Dejun Tony Kong, Kurt T. Dirks

Research Collection Lee Kong Chian School Of Business

The following sections are included in this chapter: What is Trust and How is it Manifested in Negotiations?; What Makes a Negotiation Party Trustworthy?; Ability; Integrity; Benevolence; Perceived ability, integrity, and benevolence in combination; How Can I Gain Others' Trust?; How Can I Assess Another's Trustworthiness?; Repairing Trust After a Violation.

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Nonparametric And Semiparametric Panel Econometric Models: Estimation And Testing, Liangjun Su, Aman Ullah

Research Collection School Of Economics

This paper gives a selective review on the recent developments of nonparametric and semiparametric panel data models. We focus on the conventional panel data models with one-way error component structure, partially linear panel data models, varying coefficient panel data models, nonparametric panel data models with multi-factor error structure, and nonseparable nonparametric panel data models. For each area, we discuss the basic models and ideas of estimation, and comment on the asymptotic properties of different estimators and specification tests. Much theoretical and empirical research is needed in this emerging area

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Estimation And Forecasting Of Dynamic Conditional Covariance: A Semiparametric Multivariate Model, Xiangdong Long, Liangjun Su, Aman Ullah

Research Collection School Of Economics

We propose a semiparametric conditional covariance (SCC) estimator that combines the first-stage parametric conditional covariance (PCC) estimator with the second-stage nonparametric correction estimator in a multiplicative way. We prove the asymptotic normality of our SCC estimator, propose a nonparametric test for the correct specification of PCC models, and study its asymptotic properties. We evaluate the finite sample performance of our test and SCC estimator and compare the latter with that of PCC estimator, purely nonparametric estimator, and Hafner, Dijk, and Franses’s (2006) estimator in terms of mean squared error and Value-at-Risk losses via simulations and real data analyses.

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For A Better World, Ask "Inconvenient" Questions, Knowledge@Smu

Knowledge@SMU

Democratic societies require the participation of its citizens in order to function. A quick, obligatory visit to the polling station counts, of course, but that may not be enough. If a country is "to achieve happiness, prosperity and progress", citizens must care enough to share their constructive views – and in the absence of that, ask "inconvenient questions". Speaking at SMU's Wee Kim Wee Centre Lunchtime Talks, Viswa Sadasivan, a Nominated Member of Parliament in Singapore, believes that such questions are necessary to "provoke and stimulate" the country's leaders to greater heights. --------------------------------------------------------------------------------

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Understanding Risk Governance: Introducing Sociological Neoinstitutionalism And Foucauldian Governmentality For Further Theorizing, Wee-Kiat Lim

CCX Research

This article traces the career of risk across prominent theoretical approaches by highlighting their key assumptions and premises, specifically the technical approach found in the physical sciences, and economics, psychology, and sociology in the social sciences. In each discipline, the strengths and limitations of each theoretical approach are pointed out. The discussion focuses on sociology in particular because other approaches—in treating risks as dominantly technical, psychological, or economic phenomena—tend to downplay the broader historical and socio-political context that impinges on risk construction and production, and its differential impact across society. This exploration points out that institutions play an important role …

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Why 'Democracy' And 'Drifter' Firms Can Have Abnormal Returns: The Joint Importance Of Corporate Governance And Abnormal Accruals In Separating Winners From Losers, Koon Boon Kee

Research Collection School Of Accountancy

No abstract provided.

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Identity-Based Strong Designated Verifier Signature Revisited, Qiong Huang, Guomin Yang, Duncan S. Wong, Willy Susilo

Research Collection School Of Computing and Information Systems

Designated verifier signature (DVS) allows the signer to persuade a verifier the validity of a statement but prevent the verifier from transferring the conviction. Strong designated verifier signature (SDVS) is a variant of DVS, which only allows the verifier to privately check the validity of the signer’s signature. In this work we observe that the unforgeability model considered in the existing identity-based SDVS schemes is not strong enough to capture practical attacks, and propose to consider another model which is shown to be strictly stronger than the old one. We then propose a new efficient construction of identity-based SDVS scheme, …

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Mining Event Structures From Web Videos, Xiao Wu, Yi-Jie Lu, Qiang Peng, Chong-Wah Ngo

Research Collection School Of Computing and Information Systems

The article is discussing the issues of mining event structures from Web video search results using text analysis, burst detection, and clustering as with the proliferation of social media, the volume of Web videos have grown exponentially.

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Efficient Strong Designated Verifier Signature Schemes Without Random Oracle Or With Non-Delegatability, Qiong Huang, Guomin Yang, Duncan S. Wong, Willy Susilo

Research Collection School Of Computing and Information Systems

Designated verifier signature (DVS) allows a signer to convince a designated verifier that a signature is generated by the signer without letting the verifier transfer the conviction to others, while the public can still tell that the signature must be generated by one of them. Strong DVS (SDVS) strengthens the latter part by restricting the public from telling whether the signature is generated by one of them or by someone else. In this paper, we propose two new SDVS schemes. Compared with existing SDVS schemes, the first new scheme has almost the same signature size and meanwhile, is proven secure …

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Near-Duplicate Keyframe Retrieval By Semi-Supervised Learning And Nonrigid Image Matching, Jianke Zhu, Steven C. H. Hoi, Michael R. Lyu, Shuicheng Yan

Research Collection School Of Computing and Information Systems

Near-duplicate keyframe (NDK) retrieval techniques are critical to many real-world multimedia applications. Over the last few years, we have witnessed a surge of attention on studying near-duplicate image/keyframe retrieval in multimedia community. To facilitate an effective approach to NDK retrieval on large-scale data, we suggest an effective Multi-Level Ranking (MLR) scheme that effectively retrieves NDKs in a coarse-to-fine manner. One key stage of the MLR ranking scheme is how to learn an effective ranking function with extremely small training examples in a near-duplicate detection task. To attack this challenge, we employ a semi-supervised learning method, semi-supervised support vector machines, which …

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Mad Enough To See The Other Side: Anger And The Search For Disconfirming Information, Maia J. Young, Larissa Z. Tiedens, Heajung Jung, Ming-Hong Tsai

Research Collection School of Social Sciences

The current research explored the effect of anger on hypothesis confirmation the propensity to seek information that confirms rather than disconfirms one's opinion. We argued that the moving against action tendency associated with anger leads angry individuals to seek out more disconfirming information than sad individuals, attenuating the confirmation bias. We tested this hypothesis in two studies of experimentally primed anger and sadness on the selective exposure to hypothesis confirming and disconfirming information. In Study 1, participants in the angry condition were more likely to choose disconfirming information than those in the sad or neutral condition when given the opportunity …

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Testing Heterogeneity In Panel Data Models With Interactive Fixed Effects, Qihui Chen

Dissertations and Theses Collection (Open Access)

This paper proposes a test for the slope homogeneity in large dimensional panel data models with interactive fixed effects based on a measure of goodness-of-fit (R²). We first obtain, for each cross-sectional unit, the R² from the time series regression of residuals on the constant and observable regressors and then construct the test statistic R² as an equally weighted average of the cross-sectional R²'s. R̄² is close to 0 under the null hypothesis of homogenous slopes and deviates away from 0 otherwise. We show that after being appropriately centered and scaled, R^{2 …}

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Development Of An Instrument To Measure The Adoption Of Mobile Services, Shang Gao, John Krogstie, Keng Siau

Research Collection School Of Computing and Information Systems

Currently, there is no standard instrument for measuring user adoption of mobile services. Based on the mobile service acceptance model, this paper reports on the development of a survey instrument designed to measure user perception on mobile services acceptance. A survey instrument was developed by using some existing scales from prior instruments and by creating additional items which might appear to fit the construct definitions. In addition, a pilot study was conducted by distributing the survey to 25 users of a mobile service called Mobile Student Information Systems. As a result, a survey instrument containing 22 items were retained. Furthermore, …

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Lessons From The Financial Crisis: Report Of The Asian Financial Regulatory Committee, Jeremy Choo Yong Goh, Sri Adiningsih, Maria S. Gochoco-Bautista

Research Collection Lee Kong Chian School Of Business

No abstract provided.

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Understanding Investor Sentiment: The Case Of Soccer, Gennaro Bernile, Evgeny Lyandres

Research Collection Lee Kong Chian School Of Business

We examine the extent to which the stock market's inefficient responses to resolutions of uncertainty depend on investors’ biased ex ante beliefs regarding the probability distribution of future event outcomes or their ex post irrational reactions to these outcomes. We use a sample of publicly traded European soccer clubs and analyze their returns around important matches. Using a novel proxy for investors’ expectations based on contracts traded on betting exchanges (prediction markets), we find that within our sample, investor sentiment is attributable, in part, to a systematic bias in investors’ ex ante expectations. Investors are overly optimistic about their teams’ …

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The Impact Of Underemployment On Individual And Organizational Performance, Michael Ramsay Bashshur, Ana Hernández, José María Peiró

Research Collection Lee Kong Chian School Of Business

The issue of underemployment is one of increasing concern for countries across the globe. For example, in the USA estimates have put the number of underemployed as high as 20.3%, while in Europe the number of overqualified workers (just one dimension of underemployment) has been estimated at 21.5% (Groot & Maassen van den Brink, 2000). Unfortunately, given the current global economic crisis, this situation can only be expected to worsen in the near future. The international labor pool is becoming more educated and qualified (Peiró, Agut, & Grau, 2010) while organizations worldwide are seeking the minimum effective level of human …

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Do Individual Differences In Perceiving Situational Demands Moderate The Relationship Between Personality And Assessment Center Dimension Ratings?, Anne Jansen, Filip Lievens, Martin Kleinmann

Research Collection Lee Kong Chian School Of Business

This study contributes to research on assessment centers' (AC) external construct-related validity by investigating a potential moderator of the relationship between personality and AC dimension ratings. On the basis of recent insights in person-situation contingencies we hypothesized that individual differences in people's perception of situational demands moderate the relationship between personality and conceptually related AC dimension ratings. The hypotheses were tested with 108 individuals in two leaderless group discussion exercises. Results confirmed the hypotheses for two of the three traits (i.e., Agreeableness and Conscientiousness). In particular, people high on these traits who identified the situational demands received higher AC dimension …

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Towards A Cleaner Singapore: Sociological Study On Littering In Singapore, Paulin Tay Straughan, Narayanan Ganapathy, Daniel Goh, Everold Hosein

Research Collection School of Social Sciences

Keeping Singapore clean has always been the priority of the National Environment Agency (NEA). We have made much progress over the years, but as Singapore's population grows amid changing demographics, littering remains a concern.

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E Pluribus Plurum, Or, How To Fail To Back Into A State In Spite Of Really Trying, Chandran Kukathas

Research Collection School of Social Sciences

“The framework for utopia,” Robert Nozick tells us at the beginning of the fi nal section of Part iiiof Anarchy, State, and Utopia( ASU), “is equivalent to the minimal state” (p. 333). The rich andcomplex body of argumentation of Parts iand iihad produced theconclusion that the minimal, and no more than a minimal, statewas legitimate or morally justifi ed. What Part iiireveals is that theminimal state “is the one that best realizes the utopian aspirationsof untold dreamers and visionaries” (p. 333). Although this happyconvergence is surely no accident, neither, Nozick insists, is it contrived, for it is the conclusion reached …

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Internal Control Weakness And Bank Loan Contracting: Evidence From Sox Section 404 Disclosures, Jeong-Bon Kim, Byron Y. Song, Liandong Zhang

Research Collection School Of Accountancy

Using a sample of borrowing firms that disclosed internal control weaknesses (ICW) under Section 404 of the Sarbanes-Oxley Act, this study compares various features of loan contracts between firms with ICW and those without ICW. Our results show the following. First, the loan spread is higher for ICW firms than for non-ICW firms by about 28 basis points, after controlling for other known determinants of loan contract terms. Second, firms with more severe, company-level ICW pay significantly higher loan rates than those with less severe, account-level ICW. Third, lenders impose tighter nonprice terms on firms with ICW than on those …

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Sham Marriages, Ancillary Powers, And Moral Discourse: Toh Seok Kheng V. Huang Huiqun; Adp V. Adq, Siyuan Chen

Research Collection Yong Pung How School Of Law

Is marriage an institution (of public morality) or a contract (of private ordering)? In Toh Seok Kheng, the High Court concluded that it was unable to declare a “sham marriage” void just because the motives behind the marriage seemed improper. In ADP, the High Court held that since a void marriage meant there was no marriage to begin with, the “wife” was not entitled to maintenance, and there could not have been any “matrimonial assets” to be divided, unless she had a strong “moral” claim. This piece considers how the aforementioned moral-contractual dichotomy emerges in these cases.

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The Unimportance Of Being "Electronic" Or Popular Misconceptions About “Internet Contracting”, Eliza Mik

Research Collection Yong Pung How School Of Law

Existing e-commerce literature abounds with misconceptions regarding both technology and contract law. Long-standing legal concepts are adorned with “e-” or “cyber-” to appear more exciting. The traditional contractual regime issupplanted with new principles instead of being supplemented with technological considerations. It is one thing, to include technology in legal analyses, it is another to create separate, technology-specific categories. Separate categories justify the departure from traditional principles. Most, if not all, alleged “challenges” created by new communication scenarios fit within the existing legal framework, technological complexity and novelty of the Internet notwithstanding. Most “challenges” are also unrelated to the fact that …

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Hart V Finnis: How Will Positivism And Natural Law Account For The Socio-Legal Paradigm In Wikipedia, Siyuan Chen

Research Collection Yong Pung How School Of Law

There is little doubt that Wikipedia is one of the world’s most influential websites today – and its sphere of influence is set to grow in days to come. The evidence for this is strong. As of December 2010, Wikipedia is the Internet’s 6th most popular website (by virtue of the Alexa Traffic Rank), and it is also the most popular "general reference" site in cyberspace, with almost 4 million articles in the English language edition. It has been and will continue to be the flagship of Web 2.0, with every single edit being potentially scrutinised by a global audience, …

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Monetary Policy In Singapore And The Global Financial Crisis, Hwee Kwan Chow, Peter Wilson

Research Collection School Of Economics

Prior to the crisis the consensus amongst central bankers in advanced economies was that price stability, in the form of low and stable price inflation, was a top priority for monetary policy and could best be achieved by targeting interest rates (usually overnight) or monetary aggregates, such as Narrow Money (M1) and Broad Money (M2). Liquidity in the banking system could be flexibly adjusted on a daily basis through open market operations to increase or decrease the monetary base which would be transmitted to the rest of the economy through financial intermediation. Financial markets would then adjust longer-term interest rates …

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Applicant Versus Employee Scores On Self-Report Emotional Intelligence Measures, Filip Lievens, Ute-Christine Klehe, Nele Libbrecht

Research Collection Lee Kong Chian School Of Business

There exists growing interest to assess applicants' emotional intelligence (EI) via self-report trait-based measures of EI as part of the selection process. However, some studies that experimentally manipulated applicant conditions have cautioned that in these conditions use of self-report measures for assessing EI might lead to considerably higher scores than current norm scores suggest. So far, no studies have scrutinized self-reported EI scores among a sample of actual job applicants. Therefore, this study compares the scores of actual applicants at a large ICT organization (n = 109) on a well-known self-report measure of EI to the scores of employees already …

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The Law Of Abandonment And The Passing Of Property In Trash, Cheng Lim Saw

Research Collection Yong Pung How School Of Law

This article examines the law of abandonment – primarily in the context of rubbish disposal – from a comparative perspective. It will, in particular, consider whether the owner of moveable property can, in theory, divest himself of ownership rights therein by simply abandoning the chattel in question, and whether the common law recognises such a concept of (unilateral) divesting abandonment. Additionally, the article will examine how, if at all, the notion of abandonment – as it is understood and applied in relation to physical property – may also operate in the realm of intangible property.

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Full-Text Articles in Entire DC Network

Social Innovation Challenge Prizes: More Than Just The Money, Laura Bunt

Social Space

Model Selection In Validation Sampling Data: An Asymptotic Likelihood-Based Lasso Approach, Chenlei Leng, Denis H. Y. Leung

Research Collection School Of Economics

The Impact Of Transaction Duration, Volume And Direction On Price Dynamics And Volatility, Anthony S. Tay, Christopher Ting, Yiu Kuen Tse, Mitchell Warachka

Research Collection School Of Economics

The Business Model In Practice And Its Implications For Entrepreneurship Research, Gerard George, Adam J. Bock

Research Collection Lee Kong Chian School Of Business

Trust Building, Diagnosis, And Repair In The Context Of Negotiation, Donald L. Ferrin, Dejun Tony Kong, Kurt T. Dirks

Research Collection Lee Kong Chian School Of Business

Nonparametric And Semiparametric Panel Econometric Models: Estimation And Testing, Liangjun Su, Aman Ullah

Research Collection School Of Economics

Estimation And Forecasting Of Dynamic Conditional Covariance: A Semiparametric Multivariate Model, Xiangdong Long, Liangjun Su, Aman Ullah

Research Collection School Of Economics

For A Better World, Ask "Inconvenient" Questions, Knowledge@Smu

Knowledge@SMU

Understanding Risk Governance: Introducing Sociological Neoinstitutionalism And Foucauldian Governmentality For Further Theorizing, Wee-Kiat Lim

CCX Research

Why 'Democracy' And 'Drifter' Firms Can Have Abnormal Returns: The Joint Importance Of Corporate Governance And Abnormal Accruals In Separating Winners From Losers, Koon Boon Kee

Research Collection School Of Accountancy

Identity-Based Strong Designated Verifier Signature Revisited, Qiong Huang, Guomin Yang, Duncan S. Wong, Willy Susilo

Research Collection School Of Computing and Information Systems

Mining Event Structures From Web Videos, Xiao Wu, Yi-Jie Lu, Qiang Peng, Chong-Wah Ngo

Research Collection School Of Computing and Information Systems

Efficient Strong Designated Verifier Signature Schemes Without Random Oracle Or With Non-Delegatability, Qiong Huang, Guomin Yang, Duncan S. Wong, Willy Susilo

Research Collection School Of Computing and Information Systems

Near-Duplicate Keyframe Retrieval By Semi-Supervised Learning And Nonrigid Image Matching, Jianke Zhu, Steven C. H. Hoi, Michael R. Lyu, Shuicheng Yan

Research Collection School Of Computing and Information Systems

Mad Enough To See The Other Side: Anger And The Search For Disconfirming Information, Maia J. Young, Larissa Z. Tiedens, Heajung Jung, Ming-Hong Tsai

Research Collection School of Social Sciences

Testing Heterogeneity In Panel Data Models With Interactive Fixed Effects, Qihui Chen

Dissertations and Theses Collection (Open Access)

Development Of An Instrument To Measure The Adoption Of Mobile Services, Shang Gao, John Krogstie, Keng Siau

Research Collection School Of Computing and Information Systems

Lessons From The Financial Crisis: Report Of The Asian Financial Regulatory Committee, Jeremy Choo Yong Goh, Sri Adiningsih, Maria S. Gochoco-Bautista

Research Collection Lee Kong Chian School Of Business

Understanding Investor Sentiment: The Case Of Soccer, Gennaro Bernile, Evgeny Lyandres

Research Collection Lee Kong Chian School Of Business

The Impact Of Underemployment On Individual And Organizational Performance, Michael Ramsay Bashshur, Ana Hernández, José María Peiró

Research Collection Lee Kong Chian School Of Business

Do Individual Differences In Perceiving Situational Demands Moderate The Relationship Between Personality And Assessment Center Dimension Ratings?, Anne Jansen, Filip Lievens, Martin Kleinmann

Research Collection Lee Kong Chian School Of Business

Towards A Cleaner Singapore: Sociological Study On Littering In Singapore, Paulin Tay Straughan, Narayanan Ganapathy, Daniel Goh, Everold Hosein

Research Collection School of Social Sciences

E Pluribus Plurum, Or, How To Fail To Back Into A State In Spite Of Really Trying, Chandran Kukathas

Research Collection School of Social Sciences

Internal Control Weakness And Bank Loan Contracting: Evidence From Sox Section 404 Disclosures, Jeong-Bon Kim, Byron Y. Song, Liandong Zhang

Research Collection School Of Accountancy

Sham Marriages, Ancillary Powers, And Moral Discourse: Toh Seok Kheng V. Huang Huiqun; Adp V. Adq, Siyuan Chen

Research Collection Yong Pung How School Of Law

The Unimportance Of Being "Electronic" Or Popular Misconceptions About “Internet Contracting”, Eliza Mik

Research Collection Yong Pung How School Of Law

Hart V Finnis: How Will Positivism And Natural Law Account For The Socio-Legal Paradigm In Wikipedia, Siyuan Chen

Research Collection Yong Pung How School Of Law

Monetary Policy In Singapore And The Global Financial Crisis, Hwee Kwan Chow, Peter Wilson

Research Collection School Of Economics

Applicant Versus Employee Scores On Self-Report Emotional Intelligence Measures, Filip Lievens, Ute-Christine Klehe, Nele Libbrecht

Research Collection Lee Kong Chian School Of Business

The Law Of Abandonment And The Passing Of Property In Trash, Cheng Lim Saw

Research Collection Yong Pung How School Of Law