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Can Training Improve The Quality Of Inferences Made By Raters In Competency Modeling? A Quasi-Experiment, Filip Lievens, Juan I. Sanchez May 2007

Can Training Improve The Quality Of Inferences Made By Raters In Competency Modeling? A Quasi-Experiment, Filip Lievens, Juan I. Sanchez

Research Collection Lee Kong Chian School Of Business

A quasi-experiment was conducted to investigate the effects of frame-of-reference training on the quality of competency modeling ratings made by consultants. Human resources consultants from a large consulting firm were randomly assigned to either a training or a control condition. The discriminant validity, interrater reliability, and accuracy of the competency ratings were significantly higher in the training group than in the control group. Further, the discriminant validity and interrater reliability of competency inferences were highest among an additional group of trained consultants who also had competency modeling experience. Together, these results suggest that procedural interventions such as rater training can …

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Incorporating Learning Through Doing In Entrepreneurship Education: The Case Of An University Industry Alliance In Asia, Wee Liang Tan, David B. Montgomery May 2007

Incorporating Learning Through Doing In Entrepreneurship Education: The Case Of An University Industry Alliance In Asia, Wee Liang Tan, David B. Montgomery

Research Collection Lee Kong Chian School Of Business

With the developments in Asia, there is little doubt that entrepreneurship education would make it way across from the West to Asia. However, the form and manner it takes may differ because of the context and the definition of entrepreneurship adopted. With the differences in Asia and development of entrepreneurship policies adopted by the Asian policymakers, entrepreneurship education has variations across Asia. This paper outlines one such development in a new university in Singapore, involving the university with an industry alliance.

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Integrated 10th Order Fresnel Lens Design For Beam Quality Enhancement In Tapered Laser Diode, F. K. Lau, Chyng Wen Tee, C. H. Kwok, R. V. Penty, I. H. White, N. Michel, M. Krakowski May 2007

Integrated 10th Order Fresnel Lens Design For Beam Quality Enhancement In Tapered Laser Diode, F. K. Lau, Chyng Wen Tee, C. H. Kwok, R. V. Penty, I. H. White, N. Michel, M. Krakowski

Research Collection Lee Kong Chian School Of Business

An integrated 10th order Fresnel lens capable of improving the laser beam quality is reported. The far-field divergence is narrowed by an average of 1.9 deg (29%) and an overall M2- factor improvement of 15% is recorded.

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The Effects Of Optimal Time Of Day On Persuasion Processes In Older Adults, Carolyn C. Yoon, Pui Yee, Michelle Lee, Shai Danziger May 2007

The Effects Of Optimal Time Of Day On Persuasion Processes In Older Adults, Carolyn C. Yoon, Pui Yee, Michelle Lee, Shai Danziger

Research Collection Lee Kong Chian School Of Business

Past research demonstrates that the majority of older adults (60 years and older) perform resource-demanding tasks better in the morning than in the afternoon or evening. The authors ask whether this time-of-day effect also impacts persuasion processes performed under relatively high involvement. The data show that the attitudes of older adults are more strongly affected by an easy-to-process criterion, picturerelatedness, at their non-optimal time of day (afternoon) and by a more-difficult-to-process criterion, argument strength, at their optimal time of day (morning). In contrast, the attitudes of younger adults are affected primarily by argument strength at both their optimal (afternoon) and …

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Vertically-Coupled Microring Laser Array For Dual-Wavelength Generation, Chyng Wen Tee, K. A. Williams, R. V. Penty, I. H. White, M. Hamacher, U. Troppenz, H. Heidrich May 2007

Vertically-Coupled Microring Laser Array For Dual-Wavelength Generation, Chyng Wen Tee, K. A. Williams, R. V. Penty, I. H. White, M. Hamacher, U. Troppenz, H. Heidrich

Research Collection Lee Kong Chian School Of Business

We report the first demonstration of continuous-wave operation of a tunable, compact microring laser array based on a vertical-coupling architecture, well suited to larger-scale integration. Wavelength separation tunability from 4.9 to 6.3nm is observed.

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Do Hedge Funds Deliver Alpha? A Bayesian And Bootstrap Analysis, Robert Kosowski, Narayan Y. Naik, Melvyn Teo Apr 2007

Do Hedge Funds Deliver Alpha? A Bayesian And Bootstrap Analysis, Robert Kosowski, Narayan Y. Naik, Melvyn Teo

Research Collection BNP Paribas Hedge Fund Centre

Using a robust bootstrap procedure, we find that top hedge fund performance cannot be explained by luck, and that hedge fund performance persists at annual horizons. Moreover, we show that Bayesian measures, which help overcome the short-sample problem inherent in hedge fund returns, lead to superior performance predictability. Relative to sorting on OLS alphas, sorting on Bayesian alphas yields a 5.5 percent per year increase in the alpha of the spread between the top and bottom hedge fund deciles. Our results are robust, and relevant to investors, as they are neither confined to small funds, nor driven by incubation bias, …

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How Doctors And Patients Get Better, Knowledge@Smu Apr 2007

How Doctors And Patients Get Better, Knowledge@Smu

Knowledge@SMU

In Better: A Surgeon's Notes on Performance, Atul Gawande, a surgeon who also is a staff writer for The New Yorker magazine, examines both the utilitarian and the human sides of medical practice. In the book, he examines what goes right in American medical care, what goes wrong, how things either succeed or fail, and what might be done to improve the system. Among the examples he provides: A polio "mop up" in Karnataka, where Indian health care workers deployed 37,000 vaccinators to immunize 4 million children – in three days.

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Manish Sabharwal: 'In Five Years, 25% Of The World's Workers Will Be Indian', Knowledge@Smu Apr 2007

Manish Sabharwal: 'In Five Years, 25% Of The World's Workers Will Be Indian', Knowledge@Smu

Knowledge@SMU

Four years ago, Manish Sabharwal headed India Life, the country's largest business process outsourcing firm in the field of human resources. Having sold India Life to Hewitt Associates in 2002, Sabharwal has now carved out another niche in the HR business as the chairman of TeamLease, a temporary staffing firm headquartered in Bangalore. With more than 450 offices all over India and 67,000 employees, the company has a good shot at becoming the country's largest employer in the private sector by the end of 2007, Sabharwal says. In an interview with India Knowledge@Wharton, he discusses the opportunities and challenges of …

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Advertisements In Your Office Building: A Look At Focus Media's Business Model, Knowledge@Smu Apr 2007

Advertisements In Your Office Building: A Look At Focus Media's Business Model, Knowledge@Smu

Knowledge@SMU

Focus Media is the darling of investors. The company, which has placed LCD advertising screens in office buildings and other venues in some 50 cities around China, has been expanding throughout the country at a feverish rate, causing ad revenues to soar and setting share prices on a steady upward trend. Some say that the company is filling a real need in the market for advertisers trying to reach potential customers, and that the concept of advertising in confined spaces is a very good selling point. However, other observers doubt the impact and effectiveness of LCD advertising, and say there …

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As Citigroup Increases Its High-Skilled Headcount In India, Will Others Follow?, Knowledge@Smu Apr 2007

As Citigroup Increases Its High-Skilled Headcount In India, Will Others Follow?, Knowledge@Smu

Knowledge@SMU

On April 11, Citigroup CEO Charles Prince announced a massive restructuring program that involves cutting 17,000 jobs and moving more than 9,500 to locations in low-cost countries. Citigroup watchers expect some 8,000 jobs to head for India, including the outsourcing of select high-end back-office functions. If that phenomenon gathers momentum beyond the financial services industry, the U.S. could lose far more jobs than previously predicted across the skills and wage spectrum. India Knowledge@Wharton spoke with Wharton professors to understand this emerging trend in global job movements. --------------------------------------------------------------------------------

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China's Large Aircraft Program Gains Momentum: When Will It Take Off?, Knowledge@Smu Apr 2007

China's Large Aircraft Program Gains Momentum: When Will It Take Off?, Knowledge@Smu

Knowledge@SMU

With its decision earlier this year to relaunch its large aircraft program, China has signaled its intent to challenge Boeing and Airbus SA’s dominant positions in the global market. On February 26, the Chinese government announced its approval of the program and a future company to operate it. The news is a strong signal that, despite unsuccessful efforts in the 1980s, China sees the benefits of developing large aircraft, including the impact this will have on other industries, such as machinery, electronics, metallurgy, chemicals, energy and IT. What are the driving forces for this program and what will the new …

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China Forges Ahead On Financial Reform – At Its Own Pace, With Its Own Rules, Knowledge@Smu Apr 2007

China Forges Ahead On Financial Reform – At Its Own Pace, With Its Own Rules, Knowledge@Smu

Knowledge@SMU

China’s fast-evolving financial industry, like the country itself, defies the type of easy, sound bite-friendly synopses that foreign investors might like. It’s often unclear exactly what factors are stoking China’s remarkable economic growth engine. Or, as Winston Wenyan Ma, an investment banker who most recently worked for J.P. Morgan in New York and is the author of Investing in China – New Opportunities in a Transforming Stock Market, puts it: “The Chinese financial industry is a very complex story.” Speaking at the recent Wharton China Business Forum in Philadelphia, Ma moderated a panel on financial reform – a key ingredient …

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Reorganisation Of The School Of Economics & Social Sciences, Singapore Management University Apr 2007

Reorganisation Of The School Of Economics & Social Sciences, Singapore Management University

SMU Press Releases and News

No abstract provided.

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The Long-Term Impact Of The Feedback Environment On Job Satisfaction: A Field Study In A Belgian Context, Filip Anseel, Filip Lievens Apr 2007

The Long-Term Impact Of The Feedback Environment On Job Satisfaction: A Field Study In A Belgian Context, Filip Anseel, Filip Lievens

Research Collection Lee Kong Chian School Of Business

This study examines (1) the relationship between the feedback environment and job satisfaction and (2) the mediating role of leader-member exchange in a Belgian context. Results from a sample of 155 employees of a governmental service for employment and vocational training supported our hypotheses. A favorable supervisor feedback environment was related to higher levels of job satisfaction 5 months later, and this relationship was fully mediated by the quality of leader-member exchange. These findings highlight the usefulness of diagnosing and assessing the feedback environment for a better understanding of feedback processes and for enhancing feedback interventions in organisations.

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The Effect Of Financial Hedging On The Incentives For Corporate Diversification: The Role Of Stakeholder Firm-Specific Investments, Sonya Seongyeon Lim, Heli Wang Apr 2007

The Effect Of Financial Hedging On The Incentives For Corporate Diversification: The Role Of Stakeholder Firm-Specific Investments, Sonya Seongyeon Lim, Heli Wang

Research Collection Lee Kong Chian School Of Business

Financial hedging and corporate diversification are often considered substitutive means of risk management, implying that rapid development of financial hedging markets will yield less need for firms to manage risk through costly diversification. Building on a stakeholder-based view of risk management, we show that financial hedging and corporate diversification are more often complementary than substitutive. Financial hedging reduces a firm’s systematic risk, encouraging firm-specific investment by stakeholders. Larger firmspecific investment loads excessive idiosyncratic risk on the stakeholders, increasing the benefits of reducing idiosyncratic risk through diversification. Therefore, financial hedging can increase a firm’s incentives to manage risk through diversification.

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Mining Colossal Frequent Patterns By Core Pattern Fusion, Feida Zhu, Xifeng Yan, Jiawei Han, Philip S. Yu, Hong Cheng Apr 2007

Mining Colossal Frequent Patterns By Core Pattern Fusion, Feida Zhu, Xifeng Yan, Jiawei Han, Philip S. Yu, Hong Cheng

Research Collection School Of Computing and Information Systems

Extensive research for frequent-pattern mining in the past decade has brought forth a number of pattern mining algorithms that are both effective and efficient. However, the existing frequent-pattern mining algorithms encounter challenges at mining rather large patterns, called colossal frequent patterns, in the presence of an explosive number of frequent patterns. Colossal patterns are critical to many applications, especially in domains like bioinformatics. In this study, we investigate a novel mining approach called Pattern-Fusion to efficiently find a good approximation to the colossal patterns. With Pattern-Fusion, a colossal pattern is discovered by fusing its small core patterns in one step, …

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Social Network Structures In Open Source Software Development Teams, Y. Long, Keng Siau Apr 2007

Social Network Structures In Open Source Software Development Teams, Y. Long, Keng Siau

Research Collection School Of Computing and Information Systems

Drawing on social network theories and previous studies, this research examines the dynamics of social network structures in open source software (OSS) teams. Three projects were selected from SourceForge.net in terms of their similarities as well as their differences. Monthly data were extracted from the bug tracking systems in order to achieve a longitudinal view of the interaction pattern of each project. Social network analysis was used to generate the indices of social structure. The finding suggests that the interaction pattern of OSS projects evolves from a single hub at the beginning to a corel periphery model as the projects …

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A Multimodal And Multilevel Ranking Framework For Content-Based Video Retrieval, Steven C. H. Hoi, Michael R. Lyu Apr 2007

A Multimodal And Multilevel Ranking Framework For Content-Based Video Retrieval, Steven C. H. Hoi, Michael R. Lyu

Research Collection School Of Computing and Information Systems

One critical task in content-based video retrieval is to rank search results with combinations of multimodal resources effectively. This paper proposes a novel multimodal and multilevel ranking framework for content-based video retrieval. The main idea of our approach is to represent videos by graphs and learn harmonic ranking functions through fusing multimodal resources over these graphs smoothly. We further tackle the efficiency issue by a multilevel learning scheme, which makes the semi-supervised ranking method practical for large-scale applications. Our empirical evaluations on TRECVID 2005 dataset show that the proposed multimodal and multilevel ranking framework is effective and promising for content-based …

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A Multimodal And Multilevel Ranking Framework For Content-Based Video Retrieval, Steven C. H. Hoi, Michael R. Lyu Apr 2007

A Multimodal And Multilevel Ranking Framework For Content-Based Video Retrieval, Steven C. H. Hoi, Michael R. Lyu

Research Collection School Of Computing and Information Systems

One critical task in content-based video retrieval is to rank search results with combinations of multimodal resources effectively. This paper proposes a novel multimodal and multilevel ranking framework for content-based video retrieval. The main idea of our approach is to represent videos by graphs and learn harmonic ranking functions through fusing multimodal resources over these graphs smoothly. We further tackle the efficiency issue by a multilevel learning scheme, which makes the semi-supervised ranking method practical for large-scale applications. Our empirical evaluations on TRECVID 2005 dataset show that the proposed multimodal and multilevel ranking framework is effective and promising for content-based …

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Managing Stakeholders During It-Enabled Organizational Transformation: A Case Study Of E-Government In South Korea, Hyun Jeong Kim, Gary Pan, Shan Ling Pan Apr 2007

Managing Stakeholders During It-Enabled Organizational Transformation: A Case Study Of E-Government In South Korea, Hyun Jeong Kim, Gary Pan, Shan Ling Pan

Research Collection School Of Accountancy

The implementation of e-government is a burgeoning phenomenon across the globe. It improves and enhances the infrastructures and services provided to the citizens. However, a review of the IS literature reveals that research on the implementation of e-government is rather limited, which could be due to the general misconception of the public sectors as rigid and risk-averse establishments. The shortage of studies on e-government’s implementation presents a knowledge gap that needs to be plugged. This gap is significantly amplified by the increasing number of e-government initiatives being implemented by governments in recent years. This paper describes and analyzes South Korea’s …

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Socialization And The Business School, Stefano Harney Apr 2007

Socialization And The Business School, Stefano Harney

Research Collection Lee Kong Chian School Of Business

There is a new phase in the generalization of management capacities, but contrary to the assumptions of critical management educators, the investment in the business school has not been to socialize more students into this generalized management, but to seek the principle of generalization in these students themselves as part of a struggle between capital and labour. Using the insights of autonomist feminist theorists, this article attempts to analyse why critical management education has been unable to find a new object appropriate to this new generalization of management, and speculates on what the critical and political benefits might be of …

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Optimal Liquidation Strategies And Their Implications, Christopher Ting, Mitch Warachka, Yonggan Zhao Apr 2007

Optimal Liquidation Strategies And Their Implications, Christopher Ting, Mitch Warachka, Yonggan Zhao

Research Collection Lee Kong Chian School Of Business

This paper studies optimal liquidation when the selling price depends on the rate of liquidation, transaction time, volume, and the asset's intrinsic value. A generic closed-form solution for maximizing the discounted liquidation proceeds is derived. To obtain financial insights, three parametric specifications that proxy for increasingly realistic market conditions are examined. In our framework, maximizing liquidation proceeds and minimizing liquidity costs are equivalent. The optimal strategies imply more rapid liquidations in less liquid markets. We also show that volatility is stochastic when market liquidity is unpredictable.

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Simulation-Based Estimation Of Contingent-Claims Prices, Jun Yu Apr 2007

Simulation-Based Estimation Of Contingent-Claims Prices, Jun Yu

Research Collection School Of Economics

A new methodology is proposed to estimate theoretical prices of financial contingent-claims whose values are dependent on some other underlying financial assets. In the literature the preferred choice of estimator is usually maximum likelihood (ML). ML has strong asymptotic justification but is not necessarily the best method in finite samples. The present paper proposes instead a simulation-based method that improves the finite sample performance of the ML estimator while maintaining its good asymptotic properties. The methods are implemented and evaluated here in the Black-Scholes option pricing model and in the Vasicek bond pricing model, but have wider applicability. Monte Carlo …

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Global And Regional Sources Of Risk In Equity Markets: Evidence From Factor Models With Time-Varying Conditional Skewness, Aamir R. Hashmi, Anthony S. Tay Apr 2007

Global And Regional Sources Of Risk In Equity Markets: Evidence From Factor Models With Time-Varying Conditional Skewness, Aamir R. Hashmi, Anthony S. Tay

Research Collection School Of Economics

We examine the influence of global and regional factors on the conditional distribution of stock returns from six Asian markets, using factor models in which unexpected returns comprise global, regional and local shocks. The models allow for conditional heteroskedasticity and time-varying conditional skewness, and are used to measure mean, variance, and skewness spillovers. We find that incorporating time-varying conditional skewness improves the fit of our spillover models, and can alter measurements of variance spillovers. However, time-varying conditional skewness is mostly a local phenomenon; with exceptions, there is little spillover in skewness from global and regional factors.

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A Simple Approach To The Parametric Estimation Of Potentially Nonstationary Diffusions, Federico Bandi, Peter C. B. Phillips Apr 2007

A Simple Approach To The Parametric Estimation Of Potentially Nonstationary Diffusions, Federico Bandi, Peter C. B. Phillips

Research Collection School Of Economics

A simple and robust approach is proposed for the parametric estimation of scalar homogeneous stochastic differential equations. We specify a parametric class of diffusions and estimate the parameters of interest by minimizing criteria based on the integrated squared difference between kernel estimates of the drift and diffusion functions and their parametric counterparts. The procedure does not require simulations or approximations to the true transition density and has the simplicity of standard nonlinear least-squares methods in discrete time. A complete asymptotic theory for the parametric estimates is developed. The limit theory relies on infill and long span asymptotics and is robust …

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The Right Of Access To Justice: Judicial Discourse In Singapore And Malaysia, Gary Chan Apr 2007

The Right Of Access To Justice: Judicial Discourse In Singapore And Malaysia, Gary Chan

Research Collection Yong Pung How School Of Law

This is an essay on judicial discourse in Singapore and Malaysia pertaining to the nature and scope of the right of access to justice, including access to justice for the poor. We will examine the statements and pronouncements by the Singapore and Malaysia judiciary in case precedents and extra-judicial statements. Some of the issues explored include the legal status of this right of access to justice (namely, whether it is a right enshrined in the constitution or merely a right derived from the common law and whether it is qualified by economic and other interests) and the associated rights of …

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Summarizing Review Scores Of "Unequal" Reviewers, Hady W. Lauw, Ee Peng Lim, Ke Wang Apr 2007

Summarizing Review Scores Of "Unequal" Reviewers, Hady W. Lauw, Ee Peng Lim, Ke Wang

Research Collection School Of Computing and Information Systems

A frequently encountered problem in decision making is the following review problem: review a large number of objects and select a small number of the best ones. An example is selecting conference papers from a large number of submissions. This problem involves two sub-problems: assigning reviewers to each object, and summarizing reviewers ’ scores into an overall score that supposedly reflects the quality of an object. In this paper, we address the score summarization sub-problem for the scenario where a small number of reviewers evaluate each object. Simply averaging the scores may not work as even a single reviewer could …

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Vulnerability Analysis Of Emap: An Efficient Rfid Mutual Authentication Protocol, Tieyan Li, Robert H. Deng Apr 2007

Vulnerability Analysis Of Emap: An Efficient Rfid Mutual Authentication Protocol, Tieyan Li, Robert H. Deng

Research Collection School Of Computing and Information Systems

In this paper, we analyze the security vulnerabilities of EMAP, an efficient RFID mutual authentication protocol recently proposed by Peris-Lopez et al. (2006). We present two effective attacks, a de-synchronization attack and a full-disclosure attack, against the protocol. The former permanently disables the authentication capability of a RFID tag by destroying synchronization between the tag and the RFID reader. The latter completely compromises a tag by extracting all the secret information stored in the tag. The de-synchronization attack can be carried out in just round of interaction in EMAP while the full-disclosure attack is accomplished across several runs of EMAP. …

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Possession, Feelings Of Ownership, And The Endowment Effect, Jochen Reb, Terry Connolly Apr 2007

Possession, Feelings Of Ownership, And The Endowment Effect, Jochen Reb, Terry Connolly

Research Collection Lee Kong Chian School Of Business

Research in judgment and decision making generally ignores the distinction between factual and subjective feelings of ownership, tacitly assuming that the two correspond closely. The present research suggests that this assumption might be usefully reexamined. In two experiments on the endowment effect we examine the role of subjective ownership by independently manipulating factual ownership (i.e., what participants were told about ownership) and physical possession of an object. This allowed us to disentangle the effects of these two factors, which are typically confounded. We found a significant effect of possession, but not of factual ownership, on monetary valuation of the object. …

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Do Hedge Funds Deliver Alpha? A Bayesian And Bootstrap Analysis, Robert Kosowski, Narayan Y. Naik, Melvyn Teo Apr 2007

Do Hedge Funds Deliver Alpha? A Bayesian And Bootstrap Analysis, Robert Kosowski, Narayan Y. Naik, Melvyn Teo

Research Collection Lee Kong Chian School Of Business

Using a robust bootstrap procedure, we find that top hedge fund performance cannot be explained by luck, and that hedge fund performance persists at annual horizons. Moreover, we show that Bayesian measures, which help overcome the short-sample problem inherent in hedge fund returns, lead to superior performance predictability. Relative to sorting on OLS alphas, sorting on Bayesian alphas yields a 5.5 percent per year increase in the alpha of the spread between the top and bottom hedge fund deciles. Our results are robust, and relevant to investors, as they are neither confined to small funds, nor driven by incubation bias, …

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