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Articles 7711 - 7740 of 9284

Full-Text Articles in Social and Behavioral Sciences

Reaching Out And Beyond: A Review Of Southeast Asian Writing In English [Book Review], Kirpal Singh Nov 2009

Reaching Out And Beyond: A Review Of Southeast Asian Writing In English [Book Review], Kirpal Singh

Research Collection School of Social Sciences

No abstract provided.

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Modeling Change Over Time: Conceptualization, Measurement, Analysis, And Interpretation, David Chan Nov 2009

Modeling Change Over Time: Conceptualization, Measurement, Analysis, And Interpretation, David Chan

Research Collection School of Social Sciences

The objective of this research report is to provide a state-of-the art review of the issues and methods relating to the modeling of change over time. The focus is on the quantitative assessment of the concept of change of time, which includes issues of conceptualization, measurement, data analysis, and interpretation. The rationale and motivation for this research originated from the author?s observations (specifically in the past decade in the capacities of journal editor, reviewer, symposium discussant, and workshop leader) on the need for a comprehensive and relatively non-technical reference on and integration of various issues in the modeling of change …

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Irish Political Parties And Policy Stances On European Integration, Kenneth Benoit Nov 2009

Irish Political Parties And Policy Stances On European Integration, Kenneth Benoit

Research Collection School of Social Sciences

Support for the political and economic integration of Europe has formed an increasingly important policy issue for Irish political parties as the European Union has grown in importance at both the domestic and European level. This article examines the political positioning of Irish parties on the issue of European integration, comparing these positions across parties and across time. For data, it draws on expert surveys taken at each election since 1992, a time series of coded manifestos as well as a computerized content analysis of the 2007 party manifestos. The article also reports the results of a previously unpublished expert …

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Social Networks, Personal Values, And Creativity: Evidence For Curvilinear And Interaction Effects, Jing Zhou, Shung Jae Shin, Daniel J. Brass, Jaepil Choi, Zhi-Xue Zhang Nov 2009

Social Networks, Personal Values, And Creativity: Evidence For Curvilinear And Interaction Effects, Jing Zhou, Shung Jae Shin, Daniel J. Brass, Jaepil Choi, Zhi-Xue Zhang

Research Collection Lee Kong Chian School Of Business

Taking an interactional perspective on creativity, the authors examined the influence of social networks and conformity value on employees' creativity. They theorized and found a curvilinear relationship between number of weak ties and creativity such that employees exhibited greater creativity when their number of weak ties was at intermediate levels rather than at lower or higher levels. In addition, employees' conformity value moderated the curvilinear relationship between number of weak ties and creativity such that employees exhibited greater creativity at intermediate levels of number of weak ties when conformity was low than when it was high. A proper match between …

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Trade, Growth And Increasing Returns To Infrastructure: The Role Of The Sophisticated Monopolist, Ashok S. Guha, Brishti Guha Nov 2009

Trade, Growth And Increasing Returns To Infrastructure: The Role Of The Sophisticated Monopolist, Ashok S. Guha, Brishti Guha

Research Collection School Of Economics

Equilibrium in international trade with increasing returns in infrastructure depends on whether the infrastructure provider is “naïve” or sophisticated. A monopolist produces infrastructure under decreasing cost using fixed equipment. Unlike similar work, we derive a unique closed-economy equilibrium. In a small open economy, with “naïve” infrastructure provider(s), multiple equilibria obtain. The industrial export potential of the economy depends on unexhausted economies of scale, and equilibria are possible where manufactures are exported despite an autarky price higher than the world price. With a sophisticated infrastructure provider, even an open economy has a unique equilibrium, which, at least as long as economies …

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Personality Scale Validities Increase Throughout Medical School, Filip Lievens, Deniz S. Ones, Stephan Dilchert Nov 2009

Personality Scale Validities Increase Throughout Medical School, Filip Lievens, Deniz S. Ones, Stephan Dilchert

Research Collection Lee Kong Chian School Of Business

Admissions and personnel decisions rely on stable predictor-criterion relationships. The authors studied the validity of Big Five personality factors and their facets for predicting academic performance in medical school across multiple years, investigating whether criterion-related validities change over time. In this longitudinal investigation, an entire European country's 1997 cohort of medical students was studied throughout their medical school career (Year 1, N = 627; Year 7, N = 306). Over time, extraversion, openness, and conscientiousness factor and facet scale scores showed increases in operational validity for predicting grade point averages. Although there may not be any advantages to being open …

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Affordable Homeownership Policy: Implications For Housing Markets, Sock Yong Phang Nov 2009

Affordable Homeownership Policy: Implications For Housing Markets, Sock Yong Phang

Research Collection School Of Economics

Affordable homeownership is a policy that is often accorded a great deal of policy attention by governments of many countries. In this paper, we examine the market implications of setting a housing price to income ratio target for a market segment by the government. The policy requires active intervention by the government with regard to the targeted sector. We use a simple model of the housing market with a homeownership affordability target to derive the market implications of such targets. In the presence of uncertainty and resource constraints, the objective of homeownership affordability is achieved for the targeted group at …

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Automated Likelihood Based Inference For Stochastic Volatility Models, H. Skaug, Jun Yu Nov 2009

Automated Likelihood Based Inference For Stochastic Volatility Models, H. Skaug, Jun Yu

Research Collection School Of Economics

The Laplace approximation is used to perform maximum likelihood estimation of univariate and multivariate stochastic volatility (SV) models. It is shown that the implementation of the Laplace approximation is greatly simplified by the use of a numerical technique known as automatic differentiation (AD). Several algorithms are proposed and compared with some existing maximum likelihood methods using both simulated data and actual data. It is found that the new methods match the statistical efficiency of the existing methods while significantly reducing the coding effort. Also proposed are simple methods for obtaining the filtered, smoothed and predictive values for the latent variable. …

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Bias In The Estimation Of The Mean Reversion Parameter In Continuous Time Models, Jun Yu Nov 2009

Bias In The Estimation Of The Mean Reversion Parameter In Continuous Time Models, Jun Yu

Research Collection School Of Economics

It is well known that for continuous time models with a linear drift standard estimation methods yield biased estimators for the mean reversion parameter both in nite discrete samples and in large in-…ll samples. In this paper, we obtain two expressions to approximate the bias of the least squares/maximum likelihood estimator of the mean reversion parameter in the Ornstein-Uhlenbeck process with a known long run mean when discretely sampled data are available. The first expression mimics the bias formula of Marriott and Pope (1954) for the discrete time model. Simulations show that this expression does not work satisfactorily when the …

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Dating The Timeline Of Financial Bubbles During The Subprime Crisis, Peter C. B. Phillips, Jun Yu Nov 2009

Dating The Timeline Of Financial Bubbles During The Subprime Crisis, Peter C. B. Phillips, Jun Yu

Research Collection School Of Economics

A new recursive regression methodology is introduced to analyze the bubble characteristics of various financial time series during the subprime crisis. The methods modify a technique proposed in Phillips, Wu, and Yu (2011) and provide a technology for identifying bubble behavior with consistent dating of their origination and collapse. The tests serve as an early warning diagnostic of bubble activity and a new procedure is introduced for testing bubble migration across markets. Three relevant financial series are investigated, including a financial asset price (a house price index), a commodity price (the crude oil price), and one bond price (the spread …

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Explosive Behavior In The 1990s Nasdaq: When Did Exuberance Escalate Asset Values?, Peter C. B. Phillips, Yangru Wu, Jun Yu Nov 2009

Explosive Behavior In The 1990s Nasdaq: When Did Exuberance Escalate Asset Values?, Peter C. B. Phillips, Yangru Wu, Jun Yu

Research Collection School Of Economics

A recursive test procedure is suggested that provides a mechanism for testing explosive behavior, date-stamping the origination and collapse of economic exuberance, and providing valid confidence intervals for explosive growth rates. The method involves the recursive implementation of a right-side unit root test and a sup test, both of which are easy to use in practical applications, and some new limit theory for mildly explosive processes. The test procedure is shown to have discriminatory power in detecting periodically collapsing bubbles, thereby overcoming a weakness in earlier applications of unit root tests for economic bubbles. Some asymptotic properties of the Evans …

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Stimulated Maximum Likelihood Estimation Of Continuous Time Stochastic Volatility Models, Tore Selland Kleppe, Jun Yu, Hans J. Skaug Nov 2009

Stimulated Maximum Likelihood Estimation Of Continuous Time Stochastic Volatility Models, Tore Selland Kleppe, Jun Yu, Hans J. Skaug

Research Collection School Of Economics

In this paper we develop and implement a method for maximum simulated likelihood estimation of the continuous time stochastic volatility model with the constant elasticity of volatility. The approach do not require observations on option prices nor volatility. To integrate out latent volatility from the joint density of return and volatility, a modified efficient importance sampling technique is used after the continuous time model is approximated using the Euler-Maruyama scheme. The Monte Carlo studies show that the method works well and the empirical applications illustrate usefulness of the method. Empirical results provide strong evidence against the Heston model.

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Econometric Analysis Of Continuous Time Models: A Survey Of Peter Philip’S Work And Some New Results, Jun Yu Nov 2009

Econometric Analysis Of Continuous Time Models: A Survey Of Peter Philip’S Work And Some New Results, Jun Yu

Research Collection School Of Economics

Econometric analysis of continuous time models has drawn the attention of Peter Phillips for nearly 40 years, resulting in many important publications by him. In these publications he has dealt with a wide range of continuous time models and econometric problems, from univariate equations to systems of equations, from asymptotic theory to nite sample issues, from parametric models to nonparametric models, from identication problems to estimation and inference problems, from stationary models to nonstationary and nearly nonstationary models. This paper provides an overview of Peter Phillips' contributions in the continuous time econometrics literature. We review the problems that have been …

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Forecasting Realized Volatility Using A Nonnegative Semiparametric Model, Daniel P. A. Preve, Anders Eriksson, Jun Yu Nov 2009

Forecasting Realized Volatility Using A Nonnegative Semiparametric Model, Daniel P. A. Preve, Anders Eriksson, Jun Yu

Research Collection School Of Economics

This paper introduces a parsimonious and yet flexible nonnegative semiparametric model to forecast volatility. The new model extends the linear nonnegative autoregressive model of Barndorff-Nielsen and Shephard (2001) and Nielsen and Shephard (2003) by way of a Box-Cox transformation. It is semiparametric in the sense that the dependency structure and the distributional form of its error component are left unspecified. The statistical properties of the model are discussed and a novel estimation method is proposed. Its out-of-sample performance is evaluated against a number of standard methods, using data on S&P 500 monthly realized volatilities. The competing models include the exponential …

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Transformation Of The Urban Rail Sector Through Ppp, Sock-Yong Phang Nov 2009

Transformation Of The Urban Rail Sector Through Ppp, Sock-Yong Phang

Research Collection School Of Economics

The recent proliferation of Public Private Partnership (PPP) projects in numerous cities has transformed the urban rail sector. The enthusiasm for PPPs can be explained by improved understanding of efficiency gains and risks of bundling and unbundling tasks as well as availability and lower cost of private sector finance. The four main PPP approaches identified are: (i) development of new systems through DBFOs (Design- Build-Finance-Operate); (ii) concessioning of rail and subway services; (iii) sale of stateowned operators through share issue privatisation; and (iv) PPPs for infrastructure maintenance and upgrading. This paper examines examples of successes and failures to better understand …

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Directed Altruism And Enforced Reciprocity In Social Networks, Stephen Leider, Markus M. Mobius, Tanya Rosenblat, Quoc-Anh Do Nov 2009

Directed Altruism And Enforced Reciprocity In Social Networks, Stephen Leider, Markus M. Mobius, Tanya Rosenblat, Quoc-Anh Do

Research Collection School Of Economics

We conducted online field experiments in large real-world social networks in order to decompose prosocial giving into three components: (1) baseline altruism toward randomly selected strangers, (2) directed altruism that favors friends over random strangers, and (3) giving motivated by the prospect of future interaction. Directed altruism increases giving to friends by 52% relative to random strangers, whereas future interaction effects increase giving by an additional 24% when giving is socially efficient. This finding suggests that future interaction affects giving through a repeated game mechanism where agents can be rewarded for granting efficiency-enhancing favors. We also find that subjects with …

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Why Did Universities Precede Primary Schools? A Political Economy Model Of Educational Change, Fali Huang Nov 2009

Why Did Universities Precede Primary Schools? A Political Economy Model Of Educational Change, Fali Huang

Research Collection School Of Economics

Universities were first established in Europe around the twelfth century, while primary schools did not appear until the nineteenth. This paper accounts for this phenomenon using a political economy model of educational change on who are educated (the elite or the masses) and what is taught (general or specific/vocational education). A key assumption is that general education is more effective than specific education in enhancing one’s skills in a broad range of tasks, including political rent-seeking. Its findings suggest that specific education for the masses is compatible with the elite rule, while mass general education is not, which refines the …

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Economic Transition And Growth, Peter C. B. Phillips, Donggyu Sul Nov 2009

Economic Transition And Growth, Peter C. B. Phillips, Donggyu Sul

Research Collection School Of Economics

Some extensions of neoclassical growth models are discussed that allow for cross-section heterogeneity among economies and evolution in rates of technological progress over time. The models offer a spectrum of transitional behavior among economies that includes convergence to a common steady-state path as well as various forms of transitional divergence and convergence. Mechanisms for modeling such transitions, measuring them econometrically, assessing group behavior and selecting subgroups are developed in the paper. Some econometric issues with the commonly used augmented Solow regressions are pointed out, including problems of endogeneity and omitted variable bias which arise under conditions of transitional heterogeneity. Alternative …

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Analyzing And Forecasting Business Cycles In A Small Open Economy: A Dynamic Factor Model For Singapore, Hwee Kwan Chow, Keen Meng Choy Oct 2009

Analyzing And Forecasting Business Cycles In A Small Open Economy: A Dynamic Factor Model For Singapore, Hwee Kwan Chow, Keen Meng Choy

Research Collection School Of Economics

A dynamic factor model is applied to a large panel dataset of Singapore’s macroeconomic variables and global economic indicators with the initial objective of analysing business cycles in a small open economy. The empirical results suggest that four common factors – which can broadly be interpreted as world, regional, electronics and domestic economic cycles – capture a large proportion of the co-variation in the quarterly time series. The estimated factor model also explains well the observed fluctuations in real economic activity and price inflation, leading us to use it in forecasting Singapore’s business cycles. We find that the forecasts generated …

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A Service Choice Model For Optimizing Taxi Service Delivery, Shih-Fen Cheng, Xin Qu Oct 2009

A Service Choice Model For Optimizing Taxi Service Delivery, Shih-Fen Cheng, Xin Qu

Research Collection School Of Computing and Information Systems

Taxi service has undergone radical revamp in recent years. In particular, significant investments in communication system and GPS devices have improved quality of taxi services through better dispatches. In this paper, we propose to leverage on such infrastructure and build a service choice model that helps individual drivers in deciding whether to serve a specific taxi stand or not. We demonstrate the value of our model by applying it to a real-world scenario. We also highlight interesting new potential approaches that could significantly improve the quality of taxi services.

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Foreign Direct Investment And Foreign Portfolio Investment Under Asymmetric Information, Ruanjai Suwantaradon Oct 2009

Foreign Direct Investment And Foreign Portfolio Investment Under Asymmetric Information, Ruanjai Suwantaradon

Research Collection School Of Economics

This paper develops a model of international capital flows when there is asymmetric information between foreign investors and domestic managers. Direct investors have a direct influence on the management, thus overcoming agency and information problems. This information advantage, however, comes at the cost of having to acquire management expertise. The tradeoff between management costs and the costs of asymmetric information consequently determines the level and composition of a country’s international capital flows. Analyzing how this tradeoff changes with economic conditions in a country, the model can qualitatively capture the experiences of many crisis countries during the 1990s. Specifically, the model …

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Patriotic Cosmopolitanism: China’S Non-Official Intellectuals’ Dream Of The Future, William A. Callahan Oct 2009

Patriotic Cosmopolitanism: China’S Non-Official Intellectuals’ Dream Of The Future, William A. Callahan

Research Collection School of Social Sciences

One of the fascinating things about China today is that it is a country in flux. With each turn along China’s path of rapid economic growth, a new set of political, economic and social questions arises. Hence it is very difficult to understand what is going on in China – not only for outsiders, but also for the Chinese people themselves.

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Presidents, Parties, And Policy Competition, Nina Wiesehomeier, Kenneth Benoit Oct 2009

Presidents, Parties, And Policy Competition, Nina Wiesehomeier, Kenneth Benoit

Research Collection School of Social Sciences

Presidential systems present a unique possibility for spatial competition between elected political agents, since presidents may represent different policy positions than the parties to which they belong. Previous research, however, has lacked a firm empirical basis on which to measure these differences. We remedy this situation, providing independent estimates of positions and saliencies for presidents and parties on multiple policy dimensions in 18 Latin American countries, from original expert survey data. Our results offer strong evidence that positioning on nearly all political issues neatly reduces to a single dimension of left-right contestation. Furthermore, contrasting differences between the positioning of presidents …

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Wissen Und Entwicklung In Singapur: Trends Und Thesen / Knowledge And Development In Singapore: Trends And Propositions, Thomas Menkhoff, Solvay Gerke, Hans-Dieter Evers, Yue-Wah Chay Oct 2009

Wissen Und Entwicklung In Singapur: Trends Und Thesen / Knowledge And Development In Singapore: Trends And Propositions, Thomas Menkhoff, Solvay Gerke, Hans-Dieter Evers, Yue-Wah Chay

Research Collection Lee Kong Chian School Of Business

This paper addresses the question how knowledge is used to benefit the economic development of Singapore. The country has followed strict science policies to establish knowledge governance regimes for a knowledge-based economy. On the basis of empirical studies the authors show, how cultural diversity and social capital impact on the ability to develop an epistemic culture of knowledge sharing and ultimately an innovative knowledge-based economy.

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First Acm Sigmm International Workshop On Social Media (Wsm'09), Suzanne Boll, Steven C. H. Hoi, Jiebo Luo, Rong Jin, Dong Xu, Irwin King Oct 2009

First Acm Sigmm International Workshop On Social Media (Wsm'09), Suzanne Boll, Steven C. H. Hoi, Jiebo Luo, Rong Jin, Dong Xu, Irwin King

Research Collection School Of Computing and Information Systems

No abstract provided.

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First Acm Sigmm International Workshop On Social Media (Wsm'09), Suzanne Boll, Steven C. H. Hoi, Jiebo Luo, Rong Jin, Dong Xu, Irwin King Oct 2009

First Acm Sigmm International Workshop On Social Media (Wsm'09), Suzanne Boll, Steven C. H. Hoi, Jiebo Luo, Rong Jin, Dong Xu, Irwin King

Research Collection School Of Computing and Information Systems

The ACM SIGMM International Workshop on Social Media(WSM’09) is the first workshop held in conjunction withthe ACM International Multimedia Conference (MM’09) atBejing, P.R. China, 2009. This workshop provides a forumfor researchers and practitioners from all over the world toshare information on their latest investigations on social mediaanalysis, exploration, search, mining, and emerging newsocial media applications.

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Deep Rationality: The Evolutionary Economics Of Decision Making, Douglas T. Kenrick, Vladas Griskevicius, Jill M. Sundie, Norman P. Li, Jessica Yexin Li, Steven L. Neuberg Oct 2009

Deep Rationality: The Evolutionary Economics Of Decision Making, Douglas T. Kenrick, Vladas Griskevicius, Jill M. Sundie, Norman P. Li, Jessica Yexin Li, Steven L. Neuberg

Research Collection School of Social Sciences

What is a “rational” decision? Economists traditionally viewed rationality as maximizing expected satisfaction. This view has been useful in modeling basic microeconomic concepts, but falls short in accounting for many everyday human decisions. It leaves unanswered why some things reliably make people more satisfied than others, and why people frequently act to make others happy at a cost to themselves. Drawing on an evolutionary perspective, we propose that people make decisions according to a set of principles that may not appear to make sense at the superficial level, but that demonstrate rationality at a deeper evolutionary level. By this, we …

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Culture As Common Sense: Perceived Consensus Versus Personal Beliefs As Mechanisms Of Cultural Influence, Xi Zou, Kim-Pong Tam, Michael W. Morris, Sau-Lai Lee, Ivy Yee-Man Lau, Chi-Yue Chiu Oct 2009

Culture As Common Sense: Perceived Consensus Versus Personal Beliefs As Mechanisms Of Cultural Influence, Xi Zou, Kim-Pong Tam, Michael W. Morris, Sau-Lai Lee, Ivy Yee-Man Lau, Chi-Yue Chiu

Research Collection School of Social Sciences

The authors propose that culture affects people through their perceptions of what is consensually believed. Whereas past research has examined whether cultural differences in social judgment are mediated by differences in individuals’ personal values and beliefs, this article investigates whether they are mediated by differences in individuals’ perceptions of the views of people around them. The authors propose that individuals who perceive that traditional views are culturally consensual (e.g., Chinese participants who believe that most of their fellows hold collectivistic values) will themselves behave and think in culturally typical ways. Four studies of previously well-established cultural differences found that cultural …

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Emotional Expression Of Capacity And Trustworthiness In Humor And In Social Dilemmas, Norman P. Li, Daniel Balliet Oct 2009

Emotional Expression Of Capacity And Trustworthiness In Humor And In Social Dilemmas, Norman P. Li, Daniel Balliet

Research Collection School of Social Sciences

Humor and social dilemmas are two disparate areas that have been linked to emotions. However, they tend to have been studied apart from considerations of emotion and emotional expression. We provide an overview of how such areas might be illuminated by Vigil's socio-relational framework, and how capacity and trustworthiness are communicated in humor and social dilemmas.

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A Semi-Parametric Two-Stage Projection Type Estimator Of Multivalued Treatment Effects, Aurobindo Ghosh Oct 2009

A Semi-Parametric Two-Stage Projection Type Estimator Of Multivalued Treatment Effects, Aurobindo Ghosh

Research Collection School Of Economics

One of the most well documented regularities in evaluation literature like returns to schooling(or funding for programs) is that several factors come together to confound the measurement of its effect. First, in observational studies the true return is often individual specific, and so it is almost impossible to use a traditional treatment effect models with randomly assigned treatment and control groups. This endogeneity in the model further exacerbates our inability to conduct such trials. Second, the problem is not a classical treatment effect measurement problem where we have discrete or more often binary treatments. Hence, techniques like measuring the Local …

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