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Articles 6481 - 6510 of 9289

Full-Text Articles in Social and Behavioral Sciences

Testing For Multiple Bubbles 2: Limit Theory Of Real Time Detectors, Peter C. B. Phillips, Shu-Ping Shi, Jun Yu Aug 2013

Testing For Multiple Bubbles 2: Limit Theory Of Real Time Detectors, Peter C. B. Phillips, Shu-Ping Shi, Jun Yu

Research Collection School Of Economics

This paper provides the limit theory of real time dating algorithms for bubble detection that were suggested in Phillips, Wu and Yu (2011, PWY) and Phillips, Shi and Yu (2013b, PSY). Bubbles are modeled using mildly explosive bubble episodes that are embedded within longer periods where the data evolves as a stochastic trend, thereby capturing normal market behavior as well as exuberance and collapse. Both the PWY and PSY estimates rely on recursive right tailed unit root tests (each with a di§erent recursive algorithm) that may be used in real time to locate the origination and collapse dates of bubbles. …

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Testing For Multiple Bubbles 1: Historical Episodes Of Exuberance And Collapse In The S&P 500, Peter C. B. Phillips, Shu-Ping Shi, Jun Yu Aug 2013

Testing For Multiple Bubbles 1: Historical Episodes Of Exuberance And Collapse In The S&P 500, Peter C. B. Phillips, Shu-Ping Shi, Jun Yu

Research Collection School Of Economics

Recent work on econometric detection mechanisms has shown the effectiveness of recursive procedures in identifying and dating financial bubbles. These procedures are useful as warning alerts in surveillance strategies conducted by central banks and fiscal regulators with real time data. Use of these methods over long historical periods presents a more serious econometric challenge due to the complexity of the nonlinear structure and break mechanisms that are inherent in multiple bubble phenomena within the same sample period. To meet this challenge the present paper develops a new recursive flexible window method that is better suited for practical implementation with long …

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Housing Policies In Singapore: Evaluation Of Recent Proposals And Recommendations For Reform, Sock Yong Phang, David Kuo Chuen Lee, Alan Cheong, Kok Fai Phoon, Karol Wee Aug 2013

Housing Policies In Singapore: Evaluation Of Recent Proposals And Recommendations For Reform, Sock Yong Phang, David Kuo Chuen Lee, Alan Cheong, Kok Fai Phoon, Karol Wee

Research Collection School Of Economics

The Singapore housing market is unusual in its high homeownership rate, the dominance of HDB housing, and the extensive intervention of the government in regulating housing supply and demand in both the HDB and private housing sectors. Recent rapid population increases in a low interest rate and high global liquidity environment has resulted in accelerated house prices increases in Singapore. Earlier this year, the government launched “Our Singapore Conversation” of which discussion on housing policies constitutes one major component. This “conversation” comes in the wake of several consecutive rounds of measures to stabilize housing prices using various instruments. This paper …

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Growing The Asset Management Franchise: Evidence From Hedge Fund Firms, William Fung, David Hsieh, Narayan Y. Naik, Melvyn Teo Aug 2013

Growing The Asset Management Franchise: Evidence From Hedge Fund Firms, William Fung, David Hsieh, Narayan Y. Naik, Melvyn Teo

Research Collection Lee Kong Chian School Of Business

We investigate the growth strategies of hedge fund firms. We find that firms with successful first funds are able to launch follow-on funds that charge higher performance fees, set more onerous redemption terms, and attract greater inflows. While first funds outperform follow-on funds, the superior performance of the former attenuates following the launch of the second fund. Multiple-product firms underperform single-product firms, but harvest greater fee revenues. Consequently, the multiple-product firm has become the dominant business model in the hedge fund industry.

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Trial And Error In Influential Social Networks, Xiaohui Bei, Ning Chen, Liyu Dou, Xiangru Huang, Ruixin Qiang Aug 2013

Trial And Error In Influential Social Networks, Xiaohui Bei, Ning Chen, Liyu Dou, Xiangru Huang, Ruixin Qiang

Research Collection School Of Economics

In this paper, we introduce a trial-And-error model to study information diffusion in a social network. Specifically, in every discrete period, all individuals in the network concurrently try a new technology or product with certain respective probabilities. If it turns out that an individual observes a better utility, he will then adopt the trial; otherwise, the individual continues to choose his prior selection. We first demonstrate that the trial and error behavior of individuals characterizes certain global community structures of a social network, from which we are able to detect macro-communities through the observation of microbehavior of individuals. We run …

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Volatility Occupation Times, Jia Li, Viktor Todorov, George Tauchen Aug 2013

Volatility Occupation Times, Jia Li, Viktor Todorov, George Tauchen

Research Collection School Of Economics

We propose nonparametric estimators of the occupation measure and the occupation density of the diffusion coefficient (stochastic volatility) of a discretely observed Itô semimartingale on a fixed interval when the mesh of the observation grid shrinks to zero asymptotically. In a first step we estimate the volatility locally over blocks of shrinking length, and then in a second step we use these estimates to construct a sample analogue of the volatility occupation time and a kernel-based estimator of its density. We prove the consistency of our estimators and further derive bounds for their rates of convergence. We use these results …

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Derailed: Communicating Singapore’S Mass Transit Crises [Case Study], Pang, A. Aug 2013

Derailed: Communicating Singapore’S Mass Transit Crises [Case Study], Pang, A.

Research Collection Lee Kong Chian School Of Business

The case: In December 2011, one of Singapore’s main mass transit rail lines came to a standstill for several hours on two separate days. While occasional public transport breakdowns are unavoidable, the rail operator came under intense criticism for its poor handling of the incidents, including its failure in crisis communication. Its value: This case can be used to illustrate a number of perspectives and concepts from the literature on crisis and organisational communication. Of particular contemporary interest is what the case shows about how communication technologies, including social media, should and should not be used by organisations.

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Political Connection And Firm Value, James S. Ang, David K. Ding, Tiong Yang Thong Aug 2013

Political Connection And Firm Value, James S. Ang, David K. Ding, Tiong Yang Thong

Research Collection Lee Kong Chian School Of Business

We study the effect of political connection (PC) on company value in an environment where low PC is due to better institutions and not confounded by favorable social/cultural factors. We find that in Singapore, the only country that fits this description, PC in general adds little to the value of a company. However, in industries that are subject to more stringent government regulations, PC appears to be somewhat important. Robustness checks show that alternative PC variables give rise to similar results, and the addition of control variables do not drastically change the findings. Politically connected firms have higher managerial ownership …

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Improving Housing Status Quo, Sock Yong Phang, David K. C. Lee Aug 2013

Improving Housing Status Quo, Sock Yong Phang, David K. C. Lee

Research Collection Lee Kong Chian School Of Business

On home ownership and upgrading, PM Lee Hsien Loong has reaffirmed the Government's objective to make home ownership more affordable for all first-time buyers, especially low-income earners, through increasing the amounts of targeted housing grant subsidies. He spelt out the desired outcomes of housing affordability policy through his detailed matching of Housing Board flat type with household incomes.

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Inconsistent Var Regression With Common Explosive Roots, Peter C. B. Phillips, Tassos Magdalinos Aug 2013

Inconsistent Var Regression With Common Explosive Roots, Peter C. B. Phillips, Tassos Magdalinos

Research Collection School Of Economics

Nielsen (Working paper, University of Oxford, 2009) shows that vector autoregression is inconsistent when there are common explosive roots with geometric multiplicity greater than unity. This paper discusses that result, provides a coexplosive system extension and an illustrative example that helps to explain the finding, gives a consistent instrumental variable procedure, and reports some simulations. Some exact limit distribution theory is derived and a useful new reverse martingale central limit theorem is proved.

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Automation Of Common Building Energy Simulation Workflows Using Python, Clayton Miller, Christian Hersberger, Marcus Jones Aug 2013

Automation Of Common Building Energy Simulation Workflows Using Python, Clayton Miller, Christian Hersberger, Marcus Jones

Research Collection College of Integrative Studies

A valuable skillset for building industry professionals is proficiency in high-level, scripting languages that can automate and perform many common repetitive or technically intensive tasks. This application-focused paper emphasizes the use of the Python programming language in various workflows common to the building performance modeling and simulation process. Python is an open, powerful, and easy-to-learn scripting language with an emphasis on programmer productivity. While the highlighted applications themselves are notably ordinary amongst building simulation practitioners, the novelty of this discussion is in the speed and usefulness of new Python libraries and data analysis techniques. Four short examples are illustrated: simulation …

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Politics, Sharing And Emotion In Microblogs, Tuan-Anh Hoang, William Cohen, Ee Peng Lim, Doug Pierce, David Redlawsk Aug 2013

Politics, Sharing And Emotion In Microblogs, Tuan-Anh Hoang, William Cohen, Ee Peng Lim, Doug Pierce, David Redlawsk

Research Collection School Of Computing and Information Systems

In political contexts, it is known that people act as "motivated reasoners", i.e., information is evaluated first for emotional affect, and this emotional reaction influences later deliberative reasoning steps. As social media becomes a more and more prevalent way of receiving political information, it becomes important to understand more completely the interaction between information, emotion, social community, and information-sharing behavior. In this paper, we describe a high-precision classifier for politically-oriented tweets, and an accurate classifier of a Twitter user's political affiliation. Coupled with existing sentiment-analysis tools for microblogs, these methods enable us to systematically study the interaction of emotion and …

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The User’S Communication Patterns On A Mobile Social Network Site, Youngsoo Kim Aug 2013

The User’S Communication Patterns On A Mobile Social Network Site, Youngsoo Kim

Research Collection School Of Computing and Information Systems

Given that users are simultaneously connected in multiple communication channels in a social networking service site (e.g., chat, message, and group message), we explore user's collective networking behavior. We collected the data from a mobile social networking site with 4.8 million registered users. The empirical estimation shows interesting results: (1) there are cross-effects across the communication channels: substitute effects for "chat and message" and complementary effects for "message and group message" and "chat and group message" (2) there is significant local network effect but global network effect is not observed, (3) users utilize communication channels for different purposes according to …

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Comments On The Setting Up And The Growth Of Smu By Mr Heng Swee Keat, Minister For Education At Smu Commencement Ceremony 2013, Swee Keat Heng Jul 2013

Comments On The Setting Up And The Growth Of Smu By Mr Heng Swee Keat, Minister For Education At Smu Commencement Ceremony 2013, Swee Keat Heng

Oral History Collection

Transcript of speech by Mr Heng Swee Keat, Minister for Education at SMU Commencement Ceremony on Wednesday, 25 July 2013, 9am at Resorts World Sentosa. He was involved in the setting up of SMU and talked about the growth, the daring, and the sharing by SMU and its students.

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Dark, Semi-Sweet And Full-Bodied, Singapore Management University Jul 2013

Dark, Semi-Sweet And Full-Bodied, Singapore Management University

Perspectives@SMU

Cadbury grows up in India

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Nursing Homes: Insure To Ensure Quality Care, Singapore Management University Jul 2013

Nursing Homes: Insure To Ensure Quality Care, Singapore Management University

Perspectives@SMU

Women are more likely to need nursing care, but few – men or women – can afford it in old age

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Economic Indices: Managing By The Numbers, Singapore Management University Jul 2013

Economic Indices: Managing By The Numbers, Singapore Management University

Perspectives@SMU

Understanding indices is not just about crunching numbers, but appreciating how it is constructed

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Retirement Villages: Golden Years In A Golden Community, Singapore Management University Jul 2013

Retirement Villages: Golden Years In A Golden Community, Singapore Management University

Perspectives@SMU

Putting the folks in a retirement home might actually be the best thing you can do for them, if you can afford it

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Chinese Cinema's Role In Moulding Chinese Culture, Singapore Management University Jul 2013

Chinese Cinema's Role In Moulding Chinese Culture, Singapore Management University

Perspectives@SMU

Mainland China may be an economic force, but its soft power is still lacking

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On The Effect And Remedies Of Shrinkage On Classification Probability Estimation, Zhengxiao Wu, Yufeng Liu, Zhengxiao Wu Jul 2013

On The Effect And Remedies Of Shrinkage On Classification Probability Estimation, Zhengxiao Wu, Yufeng Liu, Zhengxiao Wu

Research Collection School of Economics

Shrinkage methods have been shown to be effective for classification problems. As a form of regularization, shrinkage through penalization helps to avoid overfitting and produces accurate classifiers for prediction, especially when the dimension is relatively high. Despite the benefit of shrinkage on classification accuracy of resulting classifiers, in this article, we demonstrate that shrinkage creates biases on classification probability estimation. In many cases, this bias can be large and consequently yield poor class probability estimation when the sample size is small or moderate. We offer some theoretical insights into the effect of shrinkage and provide remedies for better class probability …

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Mining Direct Antagonistic Communities In Signed Social Networks, David Lo, Didi Surian, Philips Kokoh Prasetyo, Zhang Kuan, Ee Peng Lim Jul 2013

Mining Direct Antagonistic Communities In Signed Social Networks, David Lo, Didi Surian, Philips Kokoh Prasetyo, Zhang Kuan, Ee Peng Lim

Research Collection School Of Computing and Information Systems

Social networks provide a wealth of data to study relationship dynamics among people. Most social networks such as Epinions and Facebook allow users to declare trusts or friendships with other users. Some of them also allow users to declare distrusts or negative relationships. When both positive and negative links co-exist in a network, some interesting community structures can be studied. In this work, we mine Direct Antagonistic Communities (DACs) within such signed networks. Each DAC consists of two sub-communities with positive relationships among members of each sub-community, and negative relationships among members of the other sub-community. Identifying direct antagonistic communities …

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Using Case Studies To Design And Deliver Technology-Centered Computing Education Courses: An Innovative Approach From An Undergraduate Information Systems Program In Singapore, Ilse Baumgartner Jul 2013

Using Case Studies To Design And Deliver Technology-Centered Computing Education Courses: An Innovative Approach From An Undergraduate Information Systems Program In Singapore, Ilse Baumgartner

Research Collection School Of Computing and Information Systems

While the advantages of using case studies as an educational vehicle in computing education appear to be more than obvious, there is a very limited amount of research works or practice papers reporting on actual implementations of undergraduate or graduate computing courses which would be largely based on case studies. This conference contribution reports on selected best practices of course design and delivery implemented in one of the core courses of the Bachelor of Science (Information Systems Management) degree program (BSc (ISM)) offered by the School of Information Systems (SIS) at the Singapore Management University (SMU). Nearly all assessments, exercises, …

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Reviving Dormant Ties In An Online Social Network Experiment, Ee Peng Lim, Denzil Correa, David Lo, Michael Finegold, Feida Zhu Jul 2013

Reviving Dormant Ties In An Online Social Network Experiment, Ee Peng Lim, Denzil Correa, David Lo, Michael Finegold, Feida Zhu

Research Collection School Of Computing and Information Systems

Social network users connect and interact with one another to fulfil different kinds of social and information needs. When interaction ceases between two users, we say that their tie becomes dormant. While there are different underlying reasons of dormant ties, it is important to find means to revive such ties so as to maintain vibrancy in the relationships. In this work, we thus focus on designing an online experiment to evaluate the effectiveness of personalized social messages to revive dormant ties. The experiment carefully selects users with dormant ties so that no user gets mixed treatments and be affected by …

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Revisiting The Multicultural Experience-Creativity Link: The Effects Of Cultural Distance And Comparison Mindset, Chi-Ying Cheng, Angela K. Y. Leung Jul 2013

Revisiting The Multicultural Experience-Creativity Link: The Effects Of Cultural Distance And Comparison Mindset, Chi-Ying Cheng, Angela K. Y. Leung

Research Collection School of Social Sciences

A growing literature provides evidence for the multicultural experience-creativity link such that exposure to the juxtaposition of two cultures facilitates individual creativity. The underlying mechanisms for this relationship, however, are still far from being well explored. Drawing upon the novel perspective of motivated cognition, we hypothesize that two factors interact to affect creative outcomes: (a) perceived cultural distance between the two juxtaposed cultures, and (b) comparison mind-sets. Specifically, we argue that individuals’ creative performance will be increased only when a difference mind-set is employed to process the cultural stimuli that are sufficiently different from each other. In two studies, individuals …

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Advancing Our Understanding Of Team Motivation: Integrating Conceptual Approaches And Content Areas, Guihyun Grace Park, Matthias Spitzmuller, Richard P. Deshon Jul 2013

Advancing Our Understanding Of Team Motivation: Integrating Conceptual Approaches And Content Areas, Guihyun Grace Park, Matthias Spitzmuller, Richard P. Deshon

Research Collection School of Social Sciences

Although research on team motivation has been one of the fastest growing research domains in organizational science, progress in this domain has been hampered by a lack of integrative reviews. Thus, we develop a theoretical framework in this article to summarize and discuss different conceptual approaches to team motivation for the following six content areas: team design, team needs, team goals, team self-regulation, team efficacy, and team affect. Our framework organizes previous research according to two dimensions. First, we assess the degree of interdependence between team members’ motivational states, differentiating between models that conceptualize team motivation as functionally equivalent to …

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Kiasu (怕輸) And Its Moderating Effects On Multicultural Experiences On Creativity And Persistence Tasks, Lay See Ong, Chi-Ying Cheng, Ying-Yi Hong Jul 2013

Kiasu (怕輸) And Its Moderating Effects On Multicultural Experiences On Creativity And Persistence Tasks, Lay See Ong, Chi-Ying Cheng, Ying-Yi Hong

Research Collection School of Social Sciences

Question: Can a cultural norm exert both positive and negative influence on its subscribers? Method: Three experimental studies explored this question in creativity and persistence tasks. Findings: The answer is YES. Kiasu (a Singaporean cultural norm) can either impair creativity performance or help boost persistency.

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Moulding The Nascent Corporate Social Responsibility Agenda In Singapore: Of Pragmatism, Soft Regulation, And The Economic Imperative, Eugene K. B. Tan Jul 2013

Moulding The Nascent Corporate Social Responsibility Agenda In Singapore: Of Pragmatism, Soft Regulation, And The Economic Imperative, Eugene K. B. Tan

Research Collection Yong Pung How School Of Law

This paper seeks to examine the putative growth of corporate social responsibility (CSR) in Singapore. A key impetus for the nascent CSR movement in twenty-first century Singapore is the economic imperative. As a trade-dependent industrializing economy, the economic development drive coupled with the need for international expansion has made it necessary for Singapore businesses to be cognizant of the growing CSR movement in the western, industrialized world. The government supports the CSR endeavour with an instrumental bent, where CSR ideas and concepts are adapted, incorporated, and promoted in various sectors of the economy. This paper assesses the state’s active encouragement …

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Heritage-Culture Images Disrupt Immigrants’ Second-Language Processing Through Triggering First-Language Interference, Shu Zhang, Michael W. Morris, Chi-Ying Cheng, Andy J. Yap Jul 2013

Heritage-Culture Images Disrupt Immigrants’ Second-Language Processing Through Triggering First-Language Interference, Shu Zhang, Michael W. Morris, Chi-Ying Cheng, Andy J. Yap

Research Collection School of Social Sciences

For bicultural individuals, visual cues of a setting’s cultural expectations can activate associated representations, switching the frames that guide their judgments. Research suggests that cultural cues may affect judgments through automatic priming, but has yet to investigate consequences for linguistic performance. The present studies investigate the proposal that heritage-culture cues hinder immigrants’ second-language processing by priming first-language structures. For Chinese immigrants in the United States, speaking to a Chinese (vs. Caucasian) face reduced their English fluency, but at the same time increased their social comfort, effects that did not occur for a comparison group of European Americans (study 1). Similarly, …

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Comparative Analysis Of Three Planning Support Software (Pss) Programs And Current Applications Of Planning Support System In China, Jiao J Li Y Jul 2013

Comparative Analysis Of Three Planning Support Software (Pss) Programs And Current Applications Of Planning Support System In China, Jiao J Li Y

Research Collection College of Integrative Studies

In this paper we first compare planning support system (PSS) with Geographic Information Systems (GIS) and Spatial Decision Support System (SDSS), then summarize the typical achievements about PSS in recent 20 years. We also make a critical judgment about the three main PSS software in Western Countries, namely: What if？, CommuntyViz and INDEX. The comprehensive reviews about PSS will contribute the deeper understanding on PSS and promote its wider applications in China.

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The State-Enterprise Experience In The Gcc: Whither Singapore Inc.?, Wilfred How, Caroline Yeoh Jul 2013

The State-Enterprise Experience In The Gcc: Whither Singapore Inc.?, Wilfred How, Caroline Yeoh

Research Collection Lee Kong Chian School Of Business

The city-state of Singapore's roadmap for internationalization of local companies into the GCC region has, arguably, made its mark; recently crossing the milestone of 100 local companies that have, to date, found business opportunities in this foreign and exotic land. Actually taking these opportunities, however, has proven more complicated, with cultural differences and highly dynamic local business environments posing unforeseen challenges to Singapore companies – producing a test of adaptability that has returned rather mixed results. Of particular interest are government-linked companies (GLCs), among the largest and the first of Singapore's entrants into the region; perceived as more structurally rigid, …

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