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Articles 7081 - 7110 of 9289

Full-Text Articles in Social and Behavioral Sciences

Mining Diversity On Social Media Networks, Lu Liu, Feida Zhu, Meng Jiang, Jiawei Han, Lifeng Sun, Shiqiang Yang Jan 2012

Mining Diversity On Social Media Networks, Lu Liu, Feida Zhu, Meng Jiang, Jiawei Han, Lifeng Sun, Shiqiang Yang

Research Collection School Of Computing and Information Systems

The fast development of multimedia technology and increasing availability of network bandwidth has given rise to an abundance of network data as a result of all the ever-booming social media and social websites in recent years, e.g., Flickr, Youtube, MySpace, Facebook, etc. Social network analysis has therefore become a critical problem attracting enthusiasm from both academia and industry. However, an important measure that captures a participant’s diversity in the network has been largely neglected in previous studies. Namely, diversity characterizes how diverse a given node connects with its peers. In this paper, we give a comprehensive study of this concept. …

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A New One-Level Convex Optimization Approach For Estimating Origin-Destination Demand, Wei Shen, Laura Wynter Jan 2012

A New One-Level Convex Optimization Approach For Estimating Origin-Destination Demand, Wei Shen, Laura Wynter

Research Collection School Of Computing and Information Systems

Accurately estimating Origin–Destination (OD) trip tables based on traffic data has become crucial in many real-time traffic applications. The problem of OD estimation is traditionally modeled as a bilevel network design problem (NDP), which is challenging to solve in large-scale networks. In this paper, we propose a new one-level convex optimization formulation to reasonably approximate the bilevel structure, thus allowing the development of more efficient solution algorithms. This one-level approach is consistent with user equilibrium conditions, and improves previous one-level relaxed OD estimation formulations in the literature by ‘equilibrating’ path flows using external path cost parameters. Our new formulation can, …

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Content Contribution In Social Media: The Case Of Youtube, Qian Tang, Bin Gu, Andrew B. Whinston Jan 2012

Content Contribution In Social Media: The Case Of Youtube, Qian Tang, Bin Gu, Andrew B. Whinston

Research Collection School Of Computing and Information Systems

Social media allows individuals and businesses to contribute contents for public viewing. However, little is known about the underlying incentives that why content providers derive utilities from such activities. In this study, we build a dynamic structural model to recover the utility function for content providers. Our model distinguishes short-term payoffs based on ad revenue sharing from long-term payoffs driven by content providers' reputation. The model was estimated using a panel data of 914 top 1000 video providers on You Tube from Jun 7th, 2010, to Aug 7th, 2011 since top providers are more likely to be encouraged by these …

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Imbalance Challenge Of Enacting Information Privacy Safeguards In Healthcare: A Grounded Theory Approach, Rachida Parks, Heng Xu, Chao-Hsien Chu Jan 2012

Imbalance Challenge Of Enacting Information Privacy Safeguards In Healthcare: A Grounded Theory Approach, Rachida Parks, Heng Xu, Chao-Hsien Chu

Research Collection School Of Computing and Information Systems

Healthcare organizations face significant challenges in designing and implementing the appropriate safeguards to mitigate information privacy threats. While many studies examined various technical and behavioral safeguards to protect the confidentiality and privacy of patient information, very little is known about the actual outcomes and implications of the privacy practices in which organizations engage. There is little research theoretically explaining the outcomes of enacting privacy safeguards and subsequent effects on privacy compliance. This paper reports the results of a grounded theory study investigating the intended consequences (positive impacts) and unintended (negative impacts) consequences of enacting privacy safeguards in healthcare organizations. An …

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Tweets And Votes: A Study Of The 2011 Singapore General Election, Marko M. Skoric, Nathaniel D. Poor, Palakorn Achananuparp, Ee Peng Lim, Jing Jiang Jan 2012

Tweets And Votes: A Study Of The 2011 Singapore General Election, Marko M. Skoric, Nathaniel D. Poor, Palakorn Achananuparp, Ee Peng Lim, Jing Jiang

Research Collection School Of Computing and Information Systems

This study focuses on the uses of Twitter during the elections, examining whether the messages posted online are reflective of the climate of public opinion. Using Twitter data obtained during the official campaign period of the 2011 Singapore General Election, we test the predictive power of tweets in forecasting the election results. In line with some previous studies, we find that during the elections the Twitter sphere represents a rich source of data for gauging public opinion and that the frequency of tweets mentioning names of political parties, political candidates and contested constituencies could be used to make predictions about …

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Reflecting On Appeals On Questions Of Law Arising Out Of Domestic Arbitration Awards, Darius Chan, Paul Tan Dec 2011

Reflecting On Appeals On Questions Of Law Arising Out Of Domestic Arbitration Awards, Darius Chan, Paul Tan

Research Collection Yong Pung How School Of Law

Domestic arbitration awards rendered under the Arbitration Act (Cap 10, 2002 Rev Ed) (“the Act”) can be subject to appeal on a question of law arising out of an award. Unless parties consent, an appeal can only be brought with the leave of court.

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Opportunities And Challenges For The Asset Management Industry, Singapore Management University Dec 2011

Opportunities And Challenges For The Asset Management Industry, Singapore Management University

Perspectives@SMU

With the secular rise of Asia and a deluge of capital inflows, amid a backdrop of battered global financial markets, bankers, asset managers, academics and investors gathered to hear and discuss the opportunities and challenges facing the asset management industry in Asia. Organised by the Centre for Asset Securitisation and Management in Asia(CASA), under SMU's Sim Kee Boon Institute for Financial Economics, the inaugural asset management conference hosted a panel of experts.

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Read Leadership Books. Become A Leader., Singapore Management University Dec 2011

Read Leadership Books. Become A Leader., Singapore Management University

Perspectives@SMU

When Apple co-founder Steve Jobs died in October, there was a tremendous outpouring of grief from millions of people around the world. It was all the more remarkable that they were celebrating and paying tribute to the life of someone who was neither a humanitarian nor a revered statesman.

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Beneath And Beyond The Chinese Miracle, Singapore Management University Dec 2011

Beneath And Beyond The Chinese Miracle, Singapore Management University

Perspectives@SMU

China’s rapid economic progress from an impoverished communist state to the world’s second largest economy within just three decades has enthralled many economists. That the country shifted from the classical centrally-planned command economy to one espousing free market practices while maintaining communist rule, has all given rise to this question: What exactly is the China model? Is it the hybrid of innovative state ownership and tight political control? Or is the rapid growth the result of liberal economic and political reforms?

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Social Renaissance: When Governments, Businesses And Society Collaborate, Singapore Management University Dec 2011

Social Renaissance: When Governments, Businesses And Society Collaborate, Singapore Management University

Perspectives@SMU

The world has been great at inventing high-tech “stuff” but it hasn’t been so good “at things to do with humanity and people” said Geoff Mulgan, chief executive of NESTA, the UK’s National Endowment for Science Technology and the Arts. He was speaking at Social iCon 2011, a conference jointly organised by the Lien Centre for Social Innovation, the Young Foundationand Ashoka. Held at Singapore Management University (SMU), the conference saw a gathering of veteran social innovators eager to share their experiences with participants.

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E-Learning At The Li Ka Shing Library: Another Step Forward, Yuyun W. Ishak, Rajendra Munoo, Chrissy Tan, Devika Sangaram, Janelle Chin Dec 2011

E-Learning At The Li Ka Shing Library: Another Step Forward, Yuyun W. Ishak, Rajendra Munoo, Chrissy Tan, Devika Sangaram, Janelle Chin

Research Collection Library

No abstract provided.

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Quasi‐Hidden Markov Model And Its Applications In Cluster Analysis Of Earthquake Catalogs, Zhengxiao Wu Dec 2011

Quasi‐Hidden Markov Model And Its Applications In Cluster Analysis Of Earthquake Catalogs, Zhengxiao Wu

Research Collection School of Economics

We identify a broad class of models, quasi-hidden Markov models (QHMMs), which include hidden Markov models (HMMs) as special cases. Applying the QHMM framework, this paper studies how an earthquake cluster propagates statistically. Two QHMMs are used to describe two different propagating patterns. The “mother-and-kids” model regards the first shock in an earthquake cluster as “mother” and the aftershocks as “kids,” which occur in a neighborhood centered by the mother. In the “domino” model, however, the next aftershock strikes in a neighborhood centered by the most recent previous earthquake in the cluster, and therefore aftershocks act like dominoes. As the …

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Smu Lee Kong Chian School Of Business One Of The Youngest In The World To Be Equis-Accredited For Five Years, Singapore Management University Dec 2011

Smu Lee Kong Chian School Of Business One Of The Youngest In The World To Be Equis-Accredited For Five Years, Singapore Management University

SMU Press Releases and News

No abstract provided.

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Investment Treaty Disputes: Ideological Fault Lines And An Evolving Zeitgeist, Locknie Hsu Dec 2011

Investment Treaty Disputes: Ideological Fault Lines And An Evolving Zeitgeist, Locknie Hsu

Research Collection Yong Pung How School Of Law

The zeitgeist of the 21st century in the field of investment treaty arbitrations comprises a rise in the number of such arbitrations and accompanying observations on the unwieldy jurisprudential effects of such a rise. The international investment arbitration community is alive with discussion over these effects, which discussion includes an examination of the value of prior awards as precedents.' The existing regime based on treaty interpretation clearly provides no formal system of precedent and the 'players' (read: arbitrators) change from dispute to dispute as investment arbitration tribunals do not fall within a single, neat judicial hierarchical system. With the number …

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Globalization And Commitment In Corporate Social Responsibility: Cross-National Analyses Of Institutional And Political-Economy Effect, Alwyn Lim, Kiyoteru Tsutsui Dec 2011

Globalization And Commitment In Corporate Social Responsibility: Cross-National Analyses Of Institutional And Political-Economy Effect, Alwyn Lim, Kiyoteru Tsutsui

Research Collection School of Social Sciences

This article examines why global corporate social responsibility (CSR) frameworks havegained popularity in the past decade, despite their uncertain costs and benefits, and how theyaffect adherents’ behavior. We focus on the two largest global frameworks—the United NationsGlobal Compact and the Global Reporting Initiative—to examine patterns of CSR adoption bygovernments and corporations. Drawing on institutional and political-economy theories, wedevelop a new analytic framework that focuses on four key environmental factors—globalinstitutional pressure, local receptivity, foreign economic penetration, and national economicsystem. We propose two arguments about the relationship between stated commitment andsubsequent action: decoupling due to lack of capacity and organized hypocrisy due …

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Revisiting The Similar Fact Rule In Singapore: Public Prosecutor V. Mas Swan Bin Adnan And Another, Siyuan Chen Dec 2011

Revisiting The Similar Fact Rule In Singapore: Public Prosecutor V. Mas Swan Bin Adnan And Another, Siyuan Chen

Research Collection Yong Pung How School Of Law

The similar fact rule in Singapore—as with the law on any evidence law doctrine that can be found in both our Evidence Act and the common law—has required clarification for some time. This note, which discusses the latest local decision on the similar fact rule, considers if that decision is compatible with the Evidence Act and the various conceptualisations underlying the doctrine.

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Including The Excluded: Communitarian Paths To Cosmopolitanism, Eduard Jordaan Dec 2011

Including The Excluded: Communitarian Paths To Cosmopolitanism, Eduard Jordaan

Research Collection School of Social Sciences

Cosmopolitanism is frequently criticised for overlooking the situatedness of morality and the importance of solidarity in their aspiration to global justice. A number of thinkers take these criticisms seriously and pursue ‘a communitarian path to cosmopolitanism’. Four such approaches are considered. All four view morality and justice as grounded in a specific social setting and hold that justice is more likely to result if there is some ‘we-feeling’ among people, but are simultaneously committed to expanding the realm of justice and moral concern to beyond national boundaries. To enable the theorisation of an expanded realm of situated justice and moral …

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Ancient Chinese Power, Modern Chinese Thought, Linsay Cunningham-Cross, William A. Callahan Dec 2011

Ancient Chinese Power, Modern Chinese Thought, Linsay Cunningham-Cross, William A. Callahan

Research Collection School of Social Sciences

Ancient Chinese Thought, Modern Chinese Power is the latest publication to come from Yan Xuetong's ongoing research project that explores the interstate political philosophy of China's pre-Qin era. This book is interesting on many levels, and has already drawn attention from public intellectuals and scholars in the West. This essay thus first will examine the scholarly issue of how Yan and his colleagues are employing pre-Qin thought to make philosophical and political arguments about how China will rise. It will consider the relation of the ‘kingly way’ (wang 王) and the ‘hegemonic way’ (ba 霸) to critically analyze Yan's argument …

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The Prosecution's Duty Of Disclosure In Singapore: Muhammad Bin Kadar V Public Prosecutor [2011] 3 Slr 1205, Siyuan Chen Dec 2011

The Prosecution's Duty Of Disclosure In Singapore: Muhammad Bin Kadar V Public Prosecutor [2011] 3 Slr 1205, Siyuan Chen

Research Collection Yong Pung How School Of Law

The Court of Appeal (CA) judgment in Muhammad bin Kadar v Public Prosecutor created quite a stir in Singapore. The case pertained to a murder involving two suspects, and its resolution took almost six years, with many twists and turns as to the actual facts. The CA attributed the confusion in part to questionable practices adopted by the police and the prosecution at various points in the proceedings, and reserved strong words for them in its judgment. It also established new requirements for the prosecution regarding its duty to the court to disclose relevant material not favourable to the case …

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Going Beyond The Multicultural Experience-Creativity Link: The Mediating Role Of Emotions, Chi-Ying Cheng, Angela K. Y. Leung, Tsung-Yu Wu Dec 2011

Going Beyond The Multicultural Experience-Creativity Link: The Mediating Role Of Emotions, Chi-Ying Cheng, Angela K. Y. Leung, Tsung-Yu Wu

Research Collection School of Social Sciences

This research examines the mediating role of emotions implicated in the multicultural experience—creativity link. We propose that when individuals are dealing with apparent cultural contradictions upon encountering two cultures simultaneously, mentally juxtaposing dissonant cultural stimuli could lower positive affect or increase negative affect, which could in turn induce a deeper level of cognitive processing of cultural discrepancies and inspire creativity. Two studies compared dual cultural exposure versus single cultural exposure among bicultural Singaporeans (Study 1) and compared self-relevant (jointly presenting local and foreign cultures) versus self-irrelevant (jointly presenting foreign cultures only) dual cultural exposure among monocultural Taiwanese (Study 2). As …

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Have We Become A Template Nation?, Tan K. B. Eugene Dec 2011

Have We Become A Template Nation?, Tan K. B. Eugene

Research Collection Yong Pung How School Of Law

In his commentary, SMU assistant professor of law Eugene Tan observed that last week's three MRT service breakdowns have raised concerns over whether our public transport system is able to cope with the increased commuter load and public expectations. While the road and rail infrastructure has grown significantly in the last few years, doubts now fester as to whether the relevant organisations, the people who run them and the systems and policies, have kept pace.

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International Capital Flows With Limited Commitment And Incomplete Markets, Jürgen Von Hagen, Haiping Zhang Dec 2011

International Capital Flows With Limited Commitment And Incomplete Markets, Jürgen Von Hagen, Haiping Zhang

Research Collection School Of Economics

Recent literature has proposed two alternative types of financial frictions, i.e., limited commitment and incomplete markets, to explain the patterns of international capital flows between developed and developing countries observed in the past two decades. This paper integrates both types of frictions into a two-country overlapping-generations framework to facilitate a direct comparison of their effects. In our model, limited commitment distorts the investment made by agents with different productivity, which creates a wedge between the interest rates on equity capital vs. credit capital; while incomplete markets distort the investment among projects with different riskiness, which creates a wedge between the …

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Out Of Sight, Out Of Mind: The Value Of Political Connections In Social Networks, Quoc-Anh Do, Bang Dang Nguyen, Yen Teik Lee, Kieu-Trang Nguyen Dec 2011

Out Of Sight, Out Of Mind: The Value Of Political Connections In Social Networks, Quoc-Anh Do, Bang Dang Nguyen, Yen Teik Lee, Kieu-Trang Nguyen

Research Collection School Of Economics

This paper investigates the impact of social-network connections to politicians on firm value. We focus on the networks of university classmates and alumni among directors of U.S. public firms and congressmen. Using the Regression Discontinuity Design based on close elections from 2000 to 2008, we identify that a director’s connection to an elected congressman causes a Weighted Average Treatment Effect on Cumulative Abnormal Returns of -2.65% surrounding the election date. The effect is robust and consistent through various specifications, parametric and nonparametric, with different outcome measures and social network definitions, and across many subsamples. We find evidence to support the …

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Power Maximization And Size Control Of Heteroscedasticity And Autocorrelation Robust Tests With Exponentiated Kernels, Yixiao Sun, Peter C. B. Phillips, Sainan Jin Dec 2011

Power Maximization And Size Control Of Heteroscedasticity And Autocorrelation Robust Tests With Exponentiated Kernels, Yixiao Sun, Peter C. B. Phillips, Sainan Jin

Research Collection School Of Economics

Using the power kernels of Phillips, Sun, and Jin (2006, 2007), we examine the large sample asymptotic properties of the t-test for different choices of power parameter (ρ). We show that the nonstandard fixed-ρ limit distributions of the t-statistic provide more accurate approximations to the finite sample distributions than the conventional large-ρ limit distribution. We prove that the second-order corrected critical value based on an asymptotic expansion of the nonstandard limit distribution is also second-order correct under the large-ρ asymptotics. As a further contribution, we propose a new practical procedure for selecting the test-optimal power parameter that addresses the central …

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Score Tests For Inverse Gaussian Mixtures, A. F. Desmond, Zhenlin Yang Dec 2011

Score Tests For Inverse Gaussian Mixtures, A. F. Desmond, Zhenlin Yang

Research Collection School Of Economics

The mixed inverse Gaussian given by Whitmore (Scand. J. Statist., 13, 1986, 211–220) provides a convenient way for testing the goodness-of-fit of a pure inverse Gaussian distribution. The test is a one-sided score test with the null hypothesis being the pure inverse Gaussian (i.e. the mixing parameter is zero) and the alternative a mixture. We devise a simple score test and study its finite sample properties. Monte Carlo results show that it compares favourably with the smooth test of Ducharme (Test, 10, 2001, 271-290). In practical applications, when the pure inverse Gaussian distribution is rejected, one is interested in making …

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Singapore Consumer’S Inflation Expectations And Creation Of Singapore Index Of Inflation Expectations, Aurobindo Ghosh, Jun Yu Dec 2011

Singapore Consumer’S Inflation Expectations And Creation Of Singapore Index Of Inflation Expectations, Aurobindo Ghosh, Jun Yu

Research Collection School Of Economics

The aim of this report is to highlight a broad spectrum of issues that brings about the measurement of the disagreement and the uncertainity and the formation of inflation expectations among economic agents in Singapore.

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Uniform Asymptotic Normality In Stationary And Unit Root Autoregression, Chirok Han, Peter C. B. Phillips, Donggyu Sul Dec 2011

Uniform Asymptotic Normality In Stationary And Unit Root Autoregression, Chirok Han, Peter C. B. Phillips, Donggyu Sul

Research Collection School Of Economics

While differencing transformations can eliminate nonstationarity, they typically reduce signal strength and correspondingly reduce rates of convergence in unit root autoregressions. The present paper shows that aggregating moment conditions that are formulated in differences provides an orderly mechanism for preserving information and signal strength in autoregressions with some very desirable properties. In first order autoregression, a partially aggregated estimator based on moment conditions in differences is shown to have a limiting normal distribution that holds uniformly in the autoregressive coefficient rho, including stationary and unit root cases. The rate of convergence is root n when vertical bar rho vertical bar < 1 and the limit distribution is the same as the Gaussian maximum likelihood estimator (MLE), but when rho = 1 the rate of convergence to the normal distribution is within a slowly varying factor of n. A fully aggregated estimator (FAE) is shown to have the same limit behavior in the stationary case and to have nonstandard limit distributions in unit root and near integrated cases, which reduce both the bias and the variance of the MLE. This result shows that it is possible to improve on the asymptotic behavior of the MLE without using an artificial shrinkage technique or otherwise accelerating convergence at unity at the cost of performance in the neighborhood of unity. Confidence intervals constructed from the FAE using local asymptotic theory around unity also lead to improvements over the MLE.

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Modeling Multichannel Home Video Demand In The U.S. Motion Picture Industry, Anirban Mukherjee, Vrinda Kadiyali Dec 2011

Modeling Multichannel Home Video Demand In The U.S. Motion Picture Industry, Anirban Mukherjee, Vrinda Kadiyali

Research Collection Lee Kong Chian School Of Business

The U.S. motion picture industry has become increasingly reliant on posttheatrical channel profits. Two often-cited drivers of these profits are cross-channel substitution among posttheatrical channels and seasonality in consumer preferences for any movie. The authors use a differentiated products version of the multiplicative competitive interaction model to investigate these two phenomena. They estimate the model using data from 2000 and 2001 on two posttheatrical channels in the U.S. market: purchase and rental home viewing channels. Contrary to expectations based on business press commentary, after controlling for seasonality and movie attributes, the authors find low cross-channel price and availability elasticity for …

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Cracks In The Empire: Reflections Of French Journalists And Authors On The Crisis In 1930s Indochina, Henri Copin, Tobias Rettig Dec 2011

Cracks In The Empire: Reflections Of French Journalists And Authors On The Crisis In 1930s Indochina, Henri Copin, Tobias Rettig

Research Collection School of Social Sciences

The events of the early 1930s in Vietnam left an important legacy to France's literature of enquiry and protest. Writers, essayists and journalists enquired on behalf of their audiences, and in the process developed France's littérature coloniale. By showing an interest in the colonial 'other' and identifying discrepancies between imperial ideology and colonial reality, they formed a new body of thought. This new colonial humanism arguably changed metropolitan sensibilities towards the French civilizing mission. Nevertheless, while they are critical of colonial abuses and in favour of reforms, the authors discussed in this paper do not really question the French colonial …

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Dealing With The Threats Inherent In Unproctored Internet Testing Of Cognitive Ability: Results From A Large-Scale Operational Test Program, Filip Lievens, Eugene Burke Dec 2011

Dealing With The Threats Inherent In Unproctored Internet Testing Of Cognitive Ability: Results From A Large-Scale Operational Test Program, Filip Lievens, Eugene Burke

Research Collection Lee Kong Chian School Of Business

There is little information available about operational systems of unproctored Internet testing (UIT) of cognitive ability and how they deal with the threats inherent in UIT. This descriptive study provides a much-needed empirical examination of a large-scale operational UIT system of cognitive ability that implemented test design and verification testing for increasing test security and honest responding. Test security evaluations showed item exposure and test overlap rates were acceptable. Aberrant score evaluations revealed that negative score change (higher unproctored scores than proctored ones) was negligible. Implications for UIT research are discussed.

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