Social and Behavioral Sciences Commons^™

Seeking Better Sharpe Ratio Via Bayesian Optimization, Peng Liu

Research Collection Lee Kong Chian School Of Business

Developing an excellent quantitative trading strategy to obtain a high Sharpe ratio requires optimizing several parameters at the same time. Example parameters include the window length of a moving average sequence, the choice of trading instruments, and the thresholds used to generate trading signals. Simultaneously optimizing all these parameters to seek a high Sharpe ratio is a daunting and time-consuming task, partly because of the unknown mechanism determining the Sharpe ratio. This article proposes using Bayesian optimization to systematically search for the optimal parameter configuration that leads to a high Sharpe ratio. The author shows that the proposed intelligent search …

Vehicle Rebalancing In A Shared Micromobility System With Rider Crowdsourcing, Ziliang Jin, Yulan Wang, Yun Fong Lim, Kai Pan, Zuo-Jun Max Shen

Research Collection Lee Kong Chian School Of Business

Problem definition: Shared micromobility vehicles provide an eco-friendly form of short-distance travel within an urban area. Since customers pick up and drop off vehicles in any service region at any time, such convenience often leads to a severe imbalance between vehicle supply and demand in different service regions. To overcome this, a micromobility operator can crowdsource individual riders with reward incentives in addition to engaging a third-party logistics provider (3PL) to relocate the vehicles. Methodology/results: We construct a time-space network with multiple service regions and formulate a twostage stochastic mixed-integer program considering uncertain customer demands. In the first stage, the …

Why Employees Accept Lower Pay At Mission-Oriented Companies, Insiya Hussain, Marko Pitesa, Stefan Thau, Michael Schaerer

Research Collection Lee Kong Chian School Of Business

Today’s companies are likely to tout how their work benefits human welfare or “makes the world a better place.” Recent research suggests that this may come with a potential financial drawback for workers, as it can inhibit them from negotiating for higher pay. Over five studies, job candidates consistently reported that they worried asking for higher pay from these companies would be seen as greedy or inappropriate. This suggests they are aware of a common bias, known as motivation purity bias, where managers believe employees interested in material rewards of work (such as pay) are less motivated than those motivated …

From The Square To The Shopping Mall: New Social Media, State Surveillance, And The Evolving Geographies Of Urban Protest, Andrew Stokols

Research Collection College of Integrative Studies

Despite the rise of social media as a major factor in protests since the early 2010s, scholars have documented the continued importance of urban space and “place-based networks” for social movements. However, the 2019–2020 Hong Kong Anti-ELAB protests saw a shift from occupying symbolic public space to a more variegated use of urban spaces in the city. Combining network analysis of Telegram channels and georeferencing of protest events, this study shows how new digital media platforms such as Telegram enabled a diverse array of protest activities, as well as a shift from formal centrally located civic spaces to a wider …

Estimation Of Recursive Route Choice Models With Incomplete Trip Observations, Tien Mai, The Viet Bui, Quoc Phong Nguyen, Tho V. Le

Research Collection School Of Computing and Information Systems

This work concerns the estimation of recursive route choice models in the situation that the trip observations are incomplete, i.e., there are unconnected links (or nodes) in the observations. A direct approach to handle this issue could be intractable because enumerating all paths between unconnected links (or nodes) in a real network is typically not possible. We exploit an expectation–maximization (EM) method that allows dealing with the missing-data issue by alternatively performing two steps of sampling the missing segments in the observations and solving maximum likelihood estimation problems. Moreover, observing that the EM method could be expensive, we propose a …

A Lightweight Privacy-Preserving Path Selection Scheme In Vanets, Guojun Wang, Huijie Yang

Research Collection School Of Computing and Information Systems

With the rapid development of edge computing, artificial intelligence and other technologies, intelligent transportation services in the vehicular ad hoc networks (VANETs) such as in-vehicle navigation and distress alert are increasingly being widely used in life. Currently, road navigation is an essential service in the vehicle network. However, when a user employs the road navigation service, his private data maybe exposed to roadside nodes. Meanwhile, when the trusted authorization sends the navigation route data to the user, the user can obtain all the road data. Especially, other unrequested data might be related to the military. Therefore, how to achieve secure …

Testing Automated Driving Systems By Breaking Many Laws Efficiently, Xiaodong Zhang, Wei Zhao, Yang Sun, Jun Sun, Yulong Shen, Xuewen Dong, Zijiang Yang

Research Collection School Of Computing and Information Systems

An automated driving system (ADS), as the brain of an autonomous vehicle (AV), should be tested thoroughly ahead of deployment. ADS must satisfy a complex set of rules to ensure road safety, e.g., the existing traffic laws and possibly future laws that are dedicated to AVs. To comprehensively test an ADS, we would like to systematically discover diverse scenarios in which certain traffic law is violated. The challenge is that (1) there are many traffic laws (e.g., 13 testable articles in Chinese traffic laws and 16 testable articles in Singapore traffic laws, with 81 and 43 violation situations respectively); and …

Female Ceos And Investment Efficiency In The Vietnamese Market, Jun Myung Song, Chune Young Chung

Sim Kee Boon Institute for Financial Economics

This paper proposes female CEOs’ overconfidence and risky behavior stem from gender stereotype threats. With two subsamples in Vietnam—firms in the Northern and Southern regions–we empirically show that female CEOs in the North, where there is less gender stereotype, tend to overinvest relative to male CEOs. However, in the South, they are indifferent. Additional analysis reinforces the main finding that female CEOs from the North tend to take more risks even when dealing with market volatility and uncertainty (e.g., the COVID-19 pandemic). Such risky behaviors of female CEOs in the North do not deteriorate firm value but instead, possibly improve …

An Empirical Research On The Financial Distress Risk In The Garden And Construction Industry, Jianlin Guan

Dissertations and Theses Collection (Open Access)

In recent years, the garden and construction industry has faced significant financial distressdue to the downward pressure on the macro economy. This financial distress not onlyposesrisks to the financial stability and management of enterprises but also has far-reachingimpactson society.

This paper utilizes various analytical methods such as case analysis, empirical analysis, andevent analysis to derive the following conclusions:(1)The participation of garden constructionindustry enterprises in public-private partnership (PPP) projects leads to increased financial distress.(2)The higher the debt ratio of the local government where listed gardenandconstruction enterprises are located, the greater the financial distress theyexperience.(3)Enterprises in the garden and construction industry, whose …

The Ecology Of Dialogic Interactions Towards Sustainability Of School-Based Curriculum Development, Li-Yi Wang, Victor Der-Thanq Chen, Wei-Leng Neo

CASTLe: Collection of Articles on Scholarship for Teaching and Learning

The 21st century education requires schools to provide students with better support in their learning. One way to facilitate this change is through school-based curriculum development (SBCD). Much in the literature talked about SBCD outcomes on respective key stakeholders in schools, but little has been said about the interactions amongst the stakeholders in the process of implementing SBCD. This study examined the interactions amongst school leaders, key personnel and teachers in implementing curriculum innovation in a newly founded government school in Singapore. The findings reveal that the dialogic interactions amongst the stakeholders were reflexively shaping and shaped by the culture …

The Advisory Jurisdiction Of The Constitutional Tribunal Under Article 100 Of The Constitution, Don Jia Hao Ho

Singapore Law Journal (Lexicon)

Singapore has a Constitutional Tribunal as provided for under Article 100 of the Constitution. The Tribunal is vested with advisory jurisdiction which ordinary courts do not have. This article explores the constitutional basis for the Tribunal’s existence, jurisdictional issues surrounding the Tribunal, as well as the legal effect of the Tribunal’s opinion. Moreover, this article evaluates the continued relevance of the Tribunal. In doing so, a comparative approach is adopted where appropriate.

Single Crime, Dual Crime And Another? Expansion Of The Concept Of Joint Liability Under Section 34 Of The Penal Code – Public Prosecutor V Azlin Bte Arujunah And Other Appeals [2022] 2 Slr 825, Ting Xuan Jordan Chia, Natalia Mai Do Ngoc

Singapore Law Journal (Lexicon)

It is well-understood that for most crimes to be established, the requirements of actus reus (the physical element) and mens rea (the mental element) need to be proven beyond a reasonable doubt. However, in situations involving joint offenders, if one of the offenders dealt the fatal blow, while the other offender acted as a lookout, can the other offender really be said to have the actus reus of the particular offence?

The Lack Of A Time Bar: An Injustice Within Unjust Enrichment Claims – Esben Finance Ltd And Others V Wong Hou-Lianq Neil [2022] 1 Slr 136, Jie Loong Tan

Singapore Law Journal (Lexicon)

Limitation periods refer to the period within which a claimant who has a right to claim against another person, i.e., the defendant, must begin court proceedings to establish that right. Once that period has passed, the defendant can no longer be sued on that particular action. This is to prevent the threat of an action from continually hanging over the defendant such that once the limitation period has passed, the defendant can be sure that the claimant is no longer able to sue.

Valedictory Reference In Honour Of Justice Andrew Phang: Compilation Of Valedictory Addresses For Justice Andrew Phang, Hon. Sundaresh Menon, Indranee Rajah, Lucien Wong, Hon. Yihan Goh, Adrian Tan, Davinder Singh, Scott Tan, Hon. Andrew Phang

Singapore Law Journal (Lexicon)

On 15 December 2022, Justice Andrew Phang retired from the Supreme Court Bench. To pay tribute to Justice Phang’s 18 years of service, a Valedictory Reference was convened on 28 November 2022. The following is a collection of speeches delivered at the event by distinguished members of the Bar – a fitting tribute to celebrate Justice Phang’s outstanding contributions to local jurisprudence and legal scholarship, and the indelible mark he left on the lives of those around him.

Heterogeneity In The Persistence Of Health: Evidence From A Monthly Micro Panel, Stephen Hoskins, David W. Joohnston, Johannes S. Kunz, Michael A. Shields, Kevin E. Staub

ROSA Journal Articles and Publications

Despite being widely used in health economics, dynamic models of health and healthcare typ ically assume that the persistence in these outcomes is the same for every individual. This paper explores individual-level heterogeneity in the persistence of health outcomes. Using simple re gression methods that do not place any restriction on the distribution of the heterogeneity in persistence, the paper documents substantial heterogeneity in health, medical expenditures, and healthcare use. We show that neglecting this heterogeneity leads to estimates that overstate the average persistence and can bias the coefficients of covariates. We find that between 75% and 87% of individuals …

How To Construe An Atypical Bill Of Lading: The “Luna” And Another Appeal [2021] 2 Slr 1054, Alexis Kaixin Lok

Singapore Law Journal (Lexicon)

Bills of lading have been described as the cornerstone of modern sea carriage (i.e., the transport of goods by sea). Traditionally, a bill of lading serves three functions: (1) it is a receipt by the carrier acknowledging the shipment of goods, (2) it is a memorandum of the terms of the contract of carriage, and (3) it is also a document of title to the goods shipped.

Elastic Buildings: Calibrated District-Scale Simulation Of Occupant-Flexible Campus Operation For Hybrid Work Optimization, Martín Mosteiro-Romero, Clayton Miller, Adrian Chong, Rudi Stouffs

Research Collection College of Integrative Studies

Before 2020, the way occupants utilized the built environment had been changing slowly towards scenarios in which occupants have more choice and flexibility in where and how they work. The global COVID-19 pandemic accelerated this phenomenon rapidly through lockdowns and hybrid work arrangements. Many occupants and employers are considering keeping some of these flexibility-based strategies due to their benefits and cost impacts.This paper explores how demand-driven control strategies in the built environment might support the transition to increased workplace flexibility by simulating various scenarios related to the operational technologies and policies of a real-world campus using a district-scale City Energy …

Local, Yet Global: Implications Of Caste For Mnes And International Business, Hari Bapuji, Snehanjali Chrispal, Balagopal Vissa, Gokhan Ertug

Research Collection Lee Kong Chian School Of Business

Caste is an informal institution that influences socioeconomic action in many contexts. It is becoming increasingly evident that international business research, practice, and policy need to programmatically address caste. To facilitate this endeavour, we review the limited research in IB that has addressed caste, and theorize caste as a distinct informal institution by distinguishing it from systems of stratification like race, class, and gender. In addition, we propose a parsimonious framework to highlight the implications of caste for Indian and non-Indian MNEsin their Indian and global operations. In doing this, we focus on implications with respect to the internal organization …

Automatic Scoring Of Speeded Interpersonal Assessment Center Exercises Via Machine Learning: Initial Psychometric Evidence And Practical Guidelines, Louis Hickman, Christoph N. Herde, Filip Lievens, Louis Tay

Research Collection Lee Kong Chian School Of Business

Assessment center (AC) exercises such as role-plays have established themselves as valuable approaches for obtaining insights into interpersonal behavior, but they are often considered the “Rolls Royce” of personnel assessment due to their high costs. The observation and rating process comprises a substantial part of these costs. In an exploratory case study, we capitalize on recent advances in natural language processing (NLP) by developing NLP-based machine learning (ML) models to investigate the possibility of automatically scoring AC exercises. First, we compared the convergent-related validity and contamination with word count of ML scores based on models that used different NLP methods …

Multiple, Speeded Assessments: Initial Evidence On Subgroup Differences And Applicant Perceptions, Filip Lievens, Jan Corstjens, Christoph N. Herde

Research Collection Lee Kong Chian School Of Business

Recently, shorter assessments have emerged as potential alternatives for more resourceful traditional selection approaches. Multiple, speeded assessments (MSAs) represent such an alternative. In MSAs, candidates participate in a large number of short (a maximum of 5 min), behavioral simulations in which they face a variety of job situations. Initial psychometric evidence on the validity of MSAs is promising. Yet, validity represents only one piece of evidence. It is not known whether MSAs disadvantage specific subgroups, which may inhibit diversity. There is also no information on candidates' experience of going through an MSA, which is pivotal for the attractiveness of the …

Is Democracy Good For Growth? Development At Political Transition Time Matters, Di Sima, Fali Huang

Research Collection School Of Economics

Is democracy a better political regime for economic prosperity than autocracy? This paper shows that the answer depends on the initial economic development level during the democratic transition when the foundation of institutions was laid. Democracy facilitates growth only in countries that already have adequate development at transition time. These countries are more likely to create and sustain growth-enhancing institutions than others. Without appropriate development, democracy does not improve growth; this applies to about 40% of the third-wave democratized countries. These results are based on a sample of 153 countries in 1960–2010 and robust to various specifications and endogeneity issues.

Regression-Adjusted Estimation Of Quantile Treatment Effects Under Covariate-Adaptive Randomizations, Liang Jiang, Peter C. B. Phillips, Yubo Tao, Yichong Zhang

Research Collection School Of Economics

Datasets from field experiments with covariate-adaptive randomizations (CARs) usually contain extra covariates in addition to the strata indicators. We propose to incorporate these additional covariates via auxiliary regressions in the estimation and inference of unconditional quantile treatment effects (QTEs) under CARs. We establish the consistency and limit distribution of the regression-adjusted QTE estimator and prove that the use of multiplier bootstrap inference is non-conservative under CARs. The auxiliary regression may be estimated parametrically, nonparametrically, or via regularization when the data are high-dimensional. Even when the auxiliary regression is misspecified, the proposed bootstrap inferential procedure still achieves the nominal rejection probability …

The Impact Of Working From Home On Employee Creativity: A Cross Cultural Comparison Of Germany And China, Andrew Heng

Dissertations and Theses Collection (Open Access)

The rise of work-from-home (WFH) arrangements has brought significant changes to how employees work and interact with each other. This dissertation aims to examines the potential impact of WFH arrangements on employee creativity and investigates whether this impact varies across high-context and low-context cultures, with a particular focus on how demographic characteristics such as gender, age, and education may affect this relationship. The study is conducted within a top 10 global automotive supplier with associates in China (high-context culture) and Germany (low-context culture). As individual creativity often arises from collaboration and interaction with others, I hypothesised that as WFH frequency …

The Interactive Effects Of Societal And Organizational Cultural Tightness On Employee Work Related Outcomes, Na Zhao

Dissertations and Theses Collection (Open Access)

Individuals are shaped by both their organizational and societal cultures, yet existing research often approaches these cultural dimensions in isolation, ignoring their combined impact on individual behaviors. In response to this research gap, I developed a novel theoretical framework by combining cultural tightness literature with social information processing theory. This framework highlights the interactive impacts of societal and organizational cultures on employees’ outcomes, including job performance, work attitudes, and mental health. Moreover, I proposed several mechanisms, including motivational, cognitive, and emotional mechanisms, through which these forms of cultural tightness could shape these specified work-related outcomes. To validate this framework, I …

Essays On Stakeholder Economy, Hanyu Zhang

Dissertations and Theses Collection (Open Access)

The dissertation consists of two chapters on stakeholder economy. It looks at how firms interact with the stakeholders, including not only investors, employees, customers, governments, but also the broader community and society at large, and examines how such interactions affect corporate behavior in China and the global setting. The first chapter studies how societal culture shapes firm behavior and growth by analyzing the trade-off of relying on trust in acquiring stakeholder resources, and testing with data on the number of historic Confucian schools surrounding a current firm’s location in China. Companies more exposed to Confucianism have greater social contributions and …

Essays On Culture, Institutions, And Development, Meng Liu

Dissertations and Theses Collection (Open Access)

This dissertation consists of three chapters that study culture, institutions, and economic development. In the first chapter, we study the impact of Confucianism on long-run development in northern Vietnam. Using the variation in Confucian literati across 217 historical districts between the Primitive Le and Nguyen dynasties (1426 CE - 1919 CE), we find that districts with greater exposure to Confucianism have experienced better economic outcomes over the past century. The result is robust to using the distance to exogenously located hermit Confucian as an instrument and accounting for a battery of confounders. We show that the positive effects of Confucianism …

It’S A Privilege, Not An Entitlement: Attributions Of Advantage And Perceived Deservingness Distinguish Feelings Of Privilege And Entitlement, Amos Tai

Dissertations and Theses Collection (Open Access)

Having an advantage over others can be seen as a privilege or an entitlement. Drawing on attribution theory, we hypothesized that recipients of relative advantage may perceive it as a privilege or an entitlement based on external or internal attributions of their advantage, respectively. Furthermore, we hypothesized that relative to the external attribution of privilege, the internal attribution of entitlement should subsequently predict stronger beliefs of deservingness, as well as stronger feelings of pride in response to received advantage, but stronger feelings of anger when advantage is denied. Study 1 tested the basic attributional processes tied to privilege and entitlement …

The Livingston Survey 2023, S. Anderson, B. Bovino, M. Brown, Thomas Lam, Et Al

Sim Kee Boon Institute for Financial Economics

The 15 participants in the June Livingston Survey predict higher output growth for the first half of 2023 than they predicted in the December 2022 survey. The forecasters, who are surveyed by the Federal Reserve Bank of Philadelphia twice a year, now project that the economy’s output (real GDP) will grow at an annual rate of 1.1 percent during the first half of 2023. They expect weaker conditions in the second half of 2023, when growth is expected to be at an annual rate of -0.7 percent. Both projections represent upward revisions from those of the December 2022 survey. Growth …

Squeezed Out By The Market, Seeking Strength In The Network: Makeshift Temples And The Spatio-Affective Logics Of Survival In Singapore, Quan Gao, Orlando Woods, Lily Kong

Research Collection College of Integrative Studies

This paper offers an understanding of the spatio-affective workings of religious organisations – and the marketplaces they operate in and through – that go beyond capitalist logics. We do so by examining how makeshift temples representing various forms of ‘Chinese religion’ survive in Singapore. Capitalist logics fail to explain how such marginal and precarious religious organisations, which might be ‘squeezed out’ by the market, nonetheless manage to survive amid competition. Moreover, scarce attention has been paid to how religion as a social-affective system might mediate the functioning of a religious market. This paper fills the lacuna by bringing an understanding …

Dolling-Up Under Disease Threats: Do Pathogen Threats Motivate Attractiveness Signaling?, Kai Lin Lynn Tan, Michal Folwarczny, Agata Gasiorowska, Norman P. Li

Research Collection School of Social Sciences

Under high pathogen threat, it is adaptive for humans to find mates with high immunocompetence. Supporting this, research shows that pathogen cues increase humans’ preference for physical attractiveness—an indicator of a well-functioning immune system—among their potential mates. Building on this literature, we examined whether exposure to videos depicting pathogens (vs. a control video of nature scenery) triggers the desire to signal one’s physical attractiveness. We tested this prediction in four experiments, including two well-powered preregistered ones. In Experiment 1, we examined how pathogen cues influenced the desire for cosmetic surgery and the amount of time and money participants are willing …