Economics Commons^™

Standardized Lm Tests For Spatial Error Dependence In Linear Or Panel Regressions, Badi H. Baltagi, Zhenlin Yang

Research Collection School Of Economics

The robustness of the Lagrange Multiplier (LM) tests for spatial error dependence of Burridge (1980) and Born and Breitung (2011) for the linear regression model, and Anselin (1988) and Debarsy and Etur (2010) for the panel regression model with random or fixed effects are examined. While all tests are asymptotically robust against distributional mis‐specification, their finite sample behaviour may be sensitive to the spatial layout. To overcome this shortcoming, standardized LM tests are suggested. Monte Carlo results show that the new tests possess good finite sample properties. An important observation made throughout this study is that the LM tests for …

Three Essays On Mutual Fund Ratings, Wee Seng Ng

Dissertations and Theses Collection (Open Access)

The incessant growth of the mutual fund industry has made the task of selecting mutual funds an increasingly challenging one. Unsophisticated investors turn to low-cost and readily available ratings to guide their investment decisions. Unsurprisingly, mutual fund ratings are hugely popular and influential. Anecdotal evidence and academic findings both suggest that investors gravitate towards top-rated funds. Rating is a double-edged sword. Although the use of rating simplifies the otherwise onerous job of evaluating mutual fund performance, it can lead to adverse consequences. Investors who invest only in top-rated funds are inadvertently assuming that good ratings indicate good future performance. However, …

Three Essays On Large Panel Data Models With Cross-Sectional Dependence, Yonghui Zhang

Dissertations and Theses Collection (Open Access)

My dissertation consists of three essays which contribute new theoretical results to large panel data models with cross-sectional dependence. These essays try to answer or partially answer some prominent questions such as how to detect the presence of cross-sectional dependence and how to capture the latent structure of cross-sectional dependence and estimate parameters efficiently by removing its effects. Chapter 2 introduces a nonparametric test for cross-sectional contemporaneous dependence in large dimensional panel data models based on the squared distance between the pair-wise joint density and the product of the marginals. The test can be applied to either raw observable data …

Micro-Finance Competition: Motivated Micro-Lenders, Double-Dipping And Default, Brishti Guha, Prabal Roy Chowdhury

Research Collection School Of Economics

We develop a tractable model of competition among motivated MFIs. We find that equilibria may or may not involve double-dipping (and consequently default), with there being double-dipping whenever the MFIs are very profit-oriented. Moreover, in an equilibrium with double-dipping, borrowers who double-dip are actually worse off compared to those who do not. Further, for intermediate levels of motivation, there can be multiple equilibria, with a doubledipping equilibrium co-existing with a no default equilibrium. Interestingly, an increase in MFI competition can lower efficiency, as well as increase the extent of double-dipping and default. Further, the interest rates may go either way, …

Entropy-Based Analysis And Bioinformatics-Inspired Integration Of Global Economic Information Transfer, Jinkyu Kim, Gunn Kim, Sungbae An, Young-Kyun Kwon, Sungroh Yoon

Research Collection School Of Economics

The assessment of information transfer in the global economic network helps to understand the current environment and the outlook of an economy. Most approaches on global networks extract information transfer based mainly on a single variable. This paper establishes an entirely new bioinformatics-inspired approach to integrating information transfer derived from multiple variables and develops an international economic network accordingly. In the proposed methodology, we first construct the transfer entropies (TEs) between various intra- and inter-country pairs of economic time series variables, test their significances, and then use a weighted sum approach to aggregate information captured in each TE. Through a …

Impact Of Sovereign Debt Restructuring On Financial Flows: The Case Of Indonesia, Hwee Kwan Chow, C. Adams

Research Collection School Of Economics

No abstract provided.

Estimation Of Monthly Volatility: An Empirical Comparison Of Realized Volatility, Garch And Acd-Icv Methods, Shouwei Liu, Yiu Kuen Tse

Research Collection School Of Economics

We apply the ACD-ICV method proposed by Tse and Yang (2011) for the estimation of intraday volatility to estimate monthly volatility, and empirically compare this method against the realized volatility (RV) and generalized autoregressive conditional heteroskedasticity (GARCH) methods. Our Monte Carlo results show that the ACD-ICV method performs well against the other two methods. Evidence on the Chicago Board Options Exchange volatility index (VIX) shows that it predicts the ACD-ICV volatility estimates better than it predicts the RV estimates. While the RV method is popular for the estimation of monthly volatility, its performance is inferior to the GARCH method.

Can A Financial Conditions Index Guide Monetary Policy? The Case Of Singapore, Hwee Kwan Chow

Research Collection School Of Economics

In this study, we explore the issue of whether a financial conditions index can serve as a useful guide to monetary policy in the context of Singapore. To this end, we construct an index that comprises not only the usual monetary variables like interest rates, exchange rates and credit expansions but also asset prices such as stock prices and house prices. The choice of these constituent series is motivated by the role they play in the monetary transmission mechanism with consideration given to the key role leverage plays in modern business cycles and the risk-taking channel magnified by the prolonged …

Ex Post Destruction In The Hold-Up Problem, Huan Wang, Juyuan Zhang, Yi Zhang

Research Collection School Of Economics

We investigate whether or not ex post destruction can solve the hold-up problem. After clarifying the difference between ex post destruction and nontrade when negotiation breaks down, we show that the option of ex post destruction is not sufficient to enhance ex ante efficiency. In particular, only if the information about the spitefulness of the supplier is coarse enough, will the option of ex post destruction alleviate the inefficiency of underinvestment caused by the hold-up problem.

Variable Selection In Nonparametric And Semiparametric Regression Models, Liangjun Su, Yonghui Zhang

Research Collection School Of Economics

This chapter reviews the literature on variable selection in nonparametric and semiparametric regression models via shrinkage. We highlight recent developments on simultaneous variable selection and estimation through the methods of least absolute shrinkage and selection operator (Lasso), smoothly clipped absolute deviation (SCAD) or their variants, but restrict our attention to nonparametric and semiparametric regression models. In particular, we consider variable selection in additive models, partially linear models, functional/varying coefficient models, single index models, general nonparametric regression models, and semiparametric/nonparametric quantile regression models.

Non-Normality And Heteroscedasticity Robust Lm Tests Of Spatial Dependence, Badi H. Baltagi, Zhenlin Yang

Research Collection School Of Economics

The standard LM tests for spatial dependence in linear and panel regressions are derived under the normality and homoskedasticity assumptions of the regression disturbances. Hence, they may not be robust against non-normality or heteroskedasticity of the disturbances. Following Born and Breitung (2011), we introduce general methods to modify the standard LM tests so that they become robust against heteroskedasticity and non-normality. The idea behind the robustification is to decompose the concentrated score function into a sum of uncorrelated terms so that the outer product of gradient (OPG) can be used to estimate its variance. We also provide methods for improving …

Arrow-Fisher-Hanemann-Henry And Dixit-Pindyck Option Values Under Strategic Interactions, Tomoki Fujii, Ryuichiro Ishikawa

Research Collection School Of Economics

We extend the Arrow–Fisher–Hanemann–Henry (AFHH) and Dixit–Pindyck (DP) option values to a game situation. By reinterpreting the AFHH option value as a change in the surplus from conservation because of the prospect of future information, we deal with a conceptual difficulty associated with the AFHH option value in the presence of strategic interactions. We then introduce the DP option value into a game situation. We show that the equivalence between the expected value of information and the DP option value in the standard model does not hold under strategic interactions.

Testing Whether The Underlying Continuous-Time Process Follows A Diffusion: An Infinitesimal Operator-Based Approach, Bin Chen, Zhaogang Song

Research Collection Lee Kong Chian School Of Business

We develop a nonparametric test to check whether a process can be represented by a stochastic differential equation driven only by a Brownian motion. Our testing procedure utilizes the infinitesimal operator-based martingale characterization combined with a generalized spectral approach. Such a testing procedure is feasible and convenient because the infinitesimal operator of the diffusion process has a closed-form expression. The proposed test is applicable to both univariate and multivariate processes and has an  limit distribution under the diffusion hypothesis. Simulation and empirical studies show that the proposed test has reasonable performance in small samples.

Intertemporal Substitution In Maternal Labor Supply: Evidence Using State School Entrance Age Laws, Rashmi Rekha Barua

Research Collection School Of Economics

I propose a new framework to study the intertemporal labor supply hypothesis. I use an exogenous source of variation in maternal net earning opportunities, generated through school entrance age of children, to study intertemporal labor supply behavior. Employing data from the 1980 US Census and the NLSY, I estimate the effect of a one year delay in school attendance on long run maternal labor supply. IV estimates imply that having a 5 year old enrolled in school increases labor supply measures for married women, with no younger children, by between 7 to 34 percent. Further, using a sample of 7 …

Monetary Regime Choice In Singapore: Would A Tayor Rule Outperform Exchange-Rate Management?, Hwee Kwan Chow, G.C. Lim, P. Mcnelis

Research Collection School Of Economics

This paper adopts a dynamic stochastic general equilibrium-vector autorgressive (DSGE-VAR) approach to examine the managed exchange-rate system at work in Singapore. We examine if the country has any reason to fear floating the exchange rate and adopting a Taylor rule. Our results show that, in terms of overall inflation volatility, the exchange rate rule has a comparative advantage over the Taylor rule when export price shocks are the major sources of real volatility, while a Taylor rule dominates when domestic productivity shocks drive real volatility. The exchange-rate rule also dominates the Taylor rule for reducing inflation persistence.

Testing Conditional Independence Via Empirical Likelihood, Liangjun Su, Halbert White

Research Collection School Of Economics

We construct two classes of smoothed empirical likelihood ratio tests for the conditional independence hypothesis by writing the null hypothesis as an infinite collection of conditional moment restrictions indexed by a nuisance parameter. One class is based on the CDF; another is based on smoother functions. We show that the test statistics are asymptotically normal under the null hypothesis and a sequence of Pitman local alternatives. We also show that the tests possess an asymptotic optimality property in terms of average power. Simulations suggest that the tests are well behaved in finite samples. Applications to some economic and financial time …

No Pass No Drive: Education And Allocation Of Time, Rashmi Rekha Barua, Marian Vidal-Fernandez

Research Collection School Of Economics

Since the late 1980s, several states in the US have introduced No Pass No Drive (NPND) laws that set minimum academic requirements for teenagers under 18 to obtain a driving license. Using data from the U.S. Census and Monitoring the Future (MTF) survey, we exploit cross-state, cross-cohort and cross-time variation in NPND laws to study their effect on educational outcomes and allocation of time among teenagers. Estimates using the Census show that NPND laws have a positive and significant effect on both years of completed schooling and the probability of high school completion among boys and blacks, but not girls. …

Financial Development, International Capital Flows, And Aggregate Output, Jürgen Von Hagen, Haiping Zhang

Research Collection School Of Economics

We develop a tractable two-country overlapping-generations model and show that cross-country differences in financial development can explain three recent empirical patterns of international capital flows: Financial capital flows from relatively poor to relatively rich countries, while foreign direct investment flows in the opposite direction; net capital flows go from poor to rich countries; despite its negative net international investment positions, the United States receives a positive net investment income. International capital mobility affects output in each country directly through the size of domestic investment and indirectly through the aggregate saving rate. Under certain conditions, the indirect effect may dominate the …

Nonparametric Dynamic Panel Data Models: Kernel Estimation And Specification Testing, Liangjun Su, Xun Lu

Research Collection School Of Economics

Motivated by the first differencing method for linear panel data models, we propose a class of iterative local polynomial estimators for nonparametric dynamic panel data models with or without exogeous regressors. The estimators utilize the additive structure of the first-differenced model, the fact that the two additive components have the same functional form, and the unknown function of interest is implicitly defined as a solution of a Fredholm integral equation of the second kind. We establish the uniform consistency and asymptotic normality of the estimators. We also propose a consistent test for the correct specification of linearity in typical dynamic …

Demography, Development And The Origin Of Democracy: A Model With Case Studies Of Arachic Athens And Maritime England, Brishti Guha

Research Collection School Of Economics

No abstract provided.

Does Competition Within The Military Reduce Expropriation?, Madhav S. Aney, Giovanni Ko

Research Collection School Of Economics

How can agents in the military, which control the means of coercion, commit not to expropriate from producers? In this paper we propose competition within the military as one of the mechanisms that can deter predation and consequently create commitment. In our model, even if agents within the military could expropriate all output costlessly, it is attractive to protect producers from predating military units. This is because there is a marginal defensive advantage and consequently defense is an e ective way to potentially eliminate other military units, reducing competition and leading to higher future payo s. The model predicts that …

Qml Estimation Of Dynamic Panel Data Models With Spatial Errors, Liangjun Su, Zhenlin Yang

Research Collection School Of Economics

We propose quasi maximum likelihood (QML) estimation of dynamic panel models with spatial errors when the cross-sectional dimension n is large and the time dimension T is fixed. We consider both the random effects and fixed effects models and derive the limiting distributions of the QML estimators under different assumptions on the initial observations. We propose a residual-based bootstrap method for estimating the standard errors of the QML estimators. Monte Carlo simulation shows that both the QML estimators and the bootstrap standard errors perform well in finite samples under a correct assumption on initial observations, but may perform poorly when …

The Structure Of Strategy-Proof Random Social Choice Functions Over Product Domains And Lexicographically Separable Preferences, Shurojit Chatterji, Souvik Roy, Arunava Sen

Research Collection School Of Economics

We characterize the class of dominant-strategy incentive-compatible (or strategy-proof) random social choice functions in the standard multi-dimensional voting model where voter preferences over the various dimensions (or components) are lexicographically separable. We show that these social choice functions (which we call generalized random dictatorships) are induced by probability distributions on voter sequences of length equal to the number of components. They induce a fixed probability distribution on the product set of voter peaks. The marginal probability distribution over every component is a random dictatorship. Our results generalize the classic random dictatorship result in Gibbard (1977) and the decomposability results for …

Optimal Design Of P-Value Consistent Step-Up Procedures For Multiple Comparisons With A Control In Direction-Mixed Families, Koon Shing Kwong, Siu Hung Cheung

Research Collection School Of Economics

It is common in clinical studies for several treatments to be compared to a control. Most of the related statistical techniques have been developed to accommodate inferential families in which all hypotheses are either one- or two-sided such that the familywise error rate is controlled at a specified level. Several multiple testing procedures were recently proposed to perform multiple comparisons with a control in direction-mixed families that contain a mixture of one- and two-sided inferences. Of these procedures, the p-value consistent step-up procedure is found to be superior in terms of its power and p-value consistent property. In this paper, …

Contracting Over Prices, Shurojit Chatterji, Sayantan Ghosal

Research Collection School Of Economics

We define a solution concept, perfectly contracted equilibrium, for an intertemporal exchange economy where agents are simultaneously price takers in spot commodity markets while engaging inefficient, non-Walrasian contracting over future prices. Without requiring that agents have perfect foresight, we show that perfectly contracted equilibrium outcomes are a subset of Pareto optimal allocations. It is a robust possibility for perfectly contracted equilibrium outcomes to differ from Arrow-Debreu equilibrium outcomes. We show that both centralized banking and retrading with bilateral contracting can lead to perfectly contracted equilibria.

Grandparents As Guards: A Game Theoretic Analysis Of Inheritance And Post Marital Residence In A World Of Uncertain Paternity, Brishti Guha

Research Collection School Of Economics

I unify the following (1) men face paternal uncertainty while women do not face maternal uncertainty, (2) putative fathers and paternal kin care about true paternity, (3) paternity confidence is systematically lower in matrilocal cultures than in patrilocal ones, (4) inheritance tends to be patrilineal in high paternity confidence cultures and matrilineal in low confidence ones, and (5) most societies with patrilineal inheritance were patrilocal while most societies with matrilineal inheritance were matrilocal. I model the co-evolution of inheritance patterns and post-marital residence patterns - and their relationship with paternity uncertainty. Using a game theoretic model, I examine how a …

Honesty And Intermediation: Corporate Cheating, Auditor Involvement And The Implications For Takeoff, Brishti Guha

Research Collection School Of Economics

We examine honesty and credible auditing in firm-investor relations in a repeated game of imperfect information, embedded in a general equilibrium framework. Informed auditors enhance credibility over a range of audit fees – despite the auditor’s incentive to collude – provided the probability of detection is imperfectly correlated across clients. Auditing can enhance growth especially for a relatively egalitarian distribution of wealth. We show that audit fees must be neither too high nor too low to enhance client credibility, highlight the role of mandatory audit fee disclosure, interpret international differences in shareholding patterns and uncover a possible rationale for audit …

Money And Asset Prices With Uninsurable Risks, Nicolas L. Jacquet, Serene Tan

Research Collection School Of Economics

We develop a model where the coexistence of money and a higher yielding asset is endogenously obtained when no restriction is placed on the use of either object as a medium of exchange. Due to the presence of uninsurable risks, agents have, in equilibrium, di⁄erent relative valuations of the asset to money, and hence, the use of money as a means of payment is strictly preferred. This endogenous di⁄erence in the willingness of agents to use money over the asset implies that money carries a greater liquidity premium than the asset. We obtain that the asset strictly dominates money in …

Singapore Inflation Expectations: Expecting The Unexpected, Aurobindo Ghosh, Jun Yu

Research Collection School Of Economics

The study of inflation expectations of Singapore house-holds is a multi-disciplinary industry-relevant research that comes out of a partnership between Singapore Management University (SMU) and MasterCard. The research team for this MasterCard-SKBI Singapore Index of Inflation Expectations (SInDEx) project applied rigorous methods using current internet-based marketing survey tools for data-collection and advanced econometric techniques to analyse the data. The updates from the quarterly waves are keenly followed by policymakers, market watchers and the media because of the enormous importance of cost of living to individuals and businesses alike.

Income Inequality: Challenges In Bridging The Gap, Singapore Management University

Perspectives@SMU

Increase social spending. Fine-tune foreign labour policies. Create more job opportunities.

These were just a few of the suggestions made during a forum organized by the anti-poverty group, ONE (Singapore) and Singapore Management University's Wee Kim Wee Centre on how to bridge the income inequality gap in Singapore.

Halimah Yacob, the Minister of State for the Ministry of Social and Family Development, said in the forum that a concern with income inequality is its impact on social mobility, as people need to have “a sense of hope and optimism that they can aspire to a better life”. How each society …