Rhode Island Current Conditions Index -- April 2013,
2013
University of Rhode Island
Rhode Island Current Conditions Index -- April 2013, Leonard Lardaro
The Rhode Island Current Conditions Index
No abstract provided.
The Existence Of State Dependence And Switching Costs In The Transition From Myspace To Facebook,
2013
Scripps College
The Existence Of State Dependence And Switching Costs In The Transition From Myspace To Facebook, Taryn M. Ohashi
Scripps Senior Theses
In this paper, I examine the existence and roles of state dependence and switching costs in the mass transition from MySpace to Facebook during the 2007-2008 time period. Using a dataset that compiles individual browsing behavior and a discrete multinomial logit model, I find precise, yet extremely small amounts of state dependence for users of only MySpace, of only Facebook, and users of both MySpace and Facebook. Positive state dependence directly implies the existence of switching costs for each firm. While there is an abundance of literature regarding switching costs in the brick and mortar setting with tangible products and …
Tolls, Exchange Rates, And Northbound International Bridge Traffic: 1990-2006,
2013
University of Texas at El Paso
Tolls, Exchange Rates, And Northbound International Bridge Traffic: 1990-2006, Thomas M. Fullerton Jr., Angel L. Molina Jr., Adam G. Walke
Border Region Modeling Project
Although there have been a small number of empirical studies that analyze northbound border crossings between Mexico and the United States, very few examine the potential impacts of both tolls and exchange rates on the various traffic categories. This effort attempts to partially fill that gap in the applied economics literature by modeling northbound traffic flows at one of the largest regional economies along the border. Results indicate that business cycle fluctuations, variations in the real exchange rate, and changes in real toll tariffs all influence cross border traffic volumes. Tolls on northbound traffic into the United States are assessed …
Nonparametric Testing For Asymmetric Information,
2013
Singapore Management University
Nonparametric Testing For Asymmetric Information, Liangjun Su, Martin Spindler
Research Collection School Of Economics
Asymmetric information is an important phenomenon in many markets and in particular in insurance markets. Testing for asymmetric information has become a very important issue in the literature in the last two decades. Almost all testing procedures that are used in empirical studies are parametric, which may yield misleading conclusions in the case of misspecification of either functional or distributional relationships among the variables of interest. Motivated by the literature on testing conditional independence, we propose a new nonparametric test for asymmetric information, which is applicable in a variety of situations. We demonstrate that the test works reasonably well through …
Testing Monotonicity In Unobservables With Panel Data,
2013
Singapore Management University
Testing Monotonicity In Unobservables With Panel Data, Liangjun Su, Stefan Hoderlein, Halbert White
Research Collection School Of Economics
Monotonicity in a scalar unobservable is a crucial identifying assumption for an important class of nonparametric structural models accommodating unobserved heterogeneity. Tests for this monotonicity have previously been unavailable. This paper proposes and analyzes tests for scalar monotonicity using panel data for structures with and without time-varying unobservables, either partially or fully nonseparable between observables and unobservables. Our nonparametric tests are computationally straightforward, have well behaved limiting distributions under the null, are consistent against precisely specified alternatives, and have standard local power properties. We provide straightforward bootstrap methods for inference. Some Monte Carlo experiments show that, for empirically relevant sample …
Collusion Set Detection Using A Quasi Hidden Markov Model,
2013
Singapore Management University
Collusion Set Detection Using A Quasi Hidden Markov Model, Zhengxiao Wu, Xiaoyu Wu
Research Collection School Of Economics
In stock market, a collusion set is defined as a group of individuals or organizations who act cooperatively with an intention of manipulating security price. Collusion-based malpractices impose large costs on the economy, but few techniques have yet been developed for collusion set detection. In this article, we propose a quasi hidden Markov model (QHMM) approach. In particular, we consider the transactions as a marked point process with hidden states, and we calculate the class conditional probabilities to identify the malicious transactions. The detection algorithms associated with the model are recursive, hence suitable for online monitoring and detection. The QHMM …
Local Linear Gmm Estimation Of Functional Coefficient Iv Models With Application To The Estimation Of Rate Of Return To Schooling,
2013
Singapore Management University
Local Linear Gmm Estimation Of Functional Coefficient Iv Models With Application To The Estimation Of Rate Of Return To Schooling, Liangjun Su, Irina Murtazashvili, Aman Ullah
Research Collection School Of Economics
We consider the local linear GMM estimation of functional coe cient models with a mix of discrete and continuous data and in the presence of endogenous regressors. We establish the asymptotic normality of the estimator and derive the optimal instrumental variable that minimizes the asymptotic variance-covariance matrix among the class of all local linear GMM estimators. Data-dependent bandwidth sequences are also allowed for. We propose a nonparametric test for the constancy of the functional coefficients, study its asymptotic properties under the null hypothesis as well as a sequence of local alternatives and global alternatives, and propose a bootstrap version for …
Cost Estimation Methods: Strategies And Examples For Public Health Services & Systems Research,
2013
University of Kentucky
Cost Estimation Methods: Strategies And Examples For Public Health Services & Systems Research, Glen P. Mays
Health Management and Policy Presentations
This webinar reviews methods for conducting cost studies in public health settings, including strategies for estimating the financial and ecnomic costs of delivering public health services, and analytic approaches to identifying factors that influence delivery costs. These types of studies are of increasing importance to policy and practice stakeholders given the need for evidence about the return-on-investment (ROI) generated through public health delivery.
Accelerating And Expanding Knowledge Transfer In Public Health Settings: Frontiers In Phssr,
2013
University of Kentucky
Accelerating And Expanding Knowledge Transfer In Public Health Settings: Frontiers In Phssr, Glen P. Mays
Health Management and Policy Presentations
Creating a "rapid-learning" system in public health requires mechanisms for the continuous exchange of knowledge and evidence among researchers, practice settings, and policy decision-makers. The open-access platform Frontiers in Public Health Services and Systems Research provides a new mechanism for this exchange.
What Are The Effects Of Mergers In The U.S. Airline Industry? An Econometric Analysis On Delta-Northwest Merger,
2013
Macalester College
What Are The Effects Of Mergers In The U.S. Airline Industry? An Econometric Analysis On Delta-Northwest Merger, Jiajun Liang
The Macalester Review
The Delta-Northwest Merger in 2008 has significantly reshaped the airline market structure and raised public concerns regarding market dominance. In this study, I will employ OLS techniques to examine the effects of merger on airfares, using more than 1,000 observations from 2008 and 2009 airline markets. Results show the belief that unbalanced market share will lead to heightened airfares misleading and unreliable. There is no significant evidence suggesting positive or negative correlations between airport dominance and airfares.
Building The Science Of Public Health Delivery: Advances In Public Health Services And Systems Research,
2013
University of Kentucky
Building The Science Of Public Health Delivery: Advances In Public Health Services And Systems Research, Glen P. Mays
Health Management and Policy Presentations
Efforts to improve the health and economic performance of the U.S. health system require evidence about how best to deliver public health strategies that protect health and prevent disease and injury on a population-wide basis. The field of public health services and systems research is building a "science of delivery" in public health that complements the evidence-based practice movement in medical care.
Rhode Island Current Conditions Index -- March 2013,
2013
University of Rhode Island
Rhode Island Current Conditions Index -- March 2013, Leonard Lardaro
The Rhode Island Current Conditions Index
No abstract provided.
Bias In The Mean Reversion Estimator In Continuous-Time Gaussian And Lévy Processes,
2013
Purdue University
Bias In The Mean Reversion Estimator In Continuous-Time Gaussian And Lévy Processes, Yong Bao, Aman Ullah, Yun Wang, Jun Yu
Research Collection School Of Economics
Continuous-time Levy processes have become increasingly popular in the asset pricing literature and estimation of the mean reversion parameter has attracted attention recently. This paper develops the approximate nite-sample bias of the ordinary least squares or quasi maximum likelihood estimator of the mean reversion parameter in continuous-time Levy processes. Simulations show that in general the approximate bias works well in capturing the true bias of the mean reversion estimator under difference scenarios. However, when the time span is small and the mean reversion parameter is approaching its lower bound, we find it more difficult to approximate well the nite-sample bias.
Estimating The Health And Economic Effects Of Public Health Spending,
2013
University of Kentucky
Estimating The Health And Economic Effects Of Public Health Spending, Glen P. Mays
Health Management and Policy Presentations
Preventable health conditions account for more than 75% of the $2.7 trillion spent annually on health care in the U.S., yet less than 5% of these expenditures are devoted to public health programs and services that are designed to prevent and control disease and injury rather than to treat the downstream consequences of these conditions. Such limited expenditures in public health may contribute to the higher rates of preventable morbidity, mortality and excess medical costs experienced in the U.S. compared to other high-income countries. In this presentation, I update previous estimates of the health effects and medical cost offsets associated …
Rhode Island Current Conditions Index -- February 2013,
2013
University of Rhode Island
Rhode Island Current Conditions Index -- February 2013, Leonard Lardaro
The Rhode Island Current Conditions Index
No abstract provided.
A Nonparametric Goodness-Of-Fit-Based Test For Conditional Heteroskedasticity,
2013
Singapore Management University
A Nonparametric Goodness-Of-Fit-Based Test For Conditional Heteroskedasticity, Liangjun Su, Aman Ullah
Research Collection School Of Economics
In this paper we propose a new nonparametric test for conditional heteroskedasticity based on a measure of nonparametric goodness-of-fit (R2) that is obtained from the local polynomial regression of the residuals from a parametric regression on some covariates. We show that after being appropriately standardized, the nonparametric R2 is asymptotically normally distributed under the null hypothesis and a sequence of Pitman local alternatives. We also prove the consistency of the test and propose a bootstrap method to obtain the bootstrap p-values. We conduct a small set of simulations and compare our test with some popular parametric and nonparametric tests in …
Physical Infrastructure And Economic Growth In El Paso: 1976-2009,
2013
University of Texas at El Paso
Physical Infrastructure And Economic Growth In El Paso: 1976-2009, Thomas M. Fullerton Jr., Azucena González Monzón, Adam G. Walke
Border Region Modeling Project
Prior research on the impacts of public capital stocks on economic growth has generally employed either national macroeconomic or multi-jurisdictional regional data. This study attempts to contribute to this area of the discipline by utilizing time series data for a single metropolitan economy. To allow for both short-run and long-run effects, an error correction modeling framework is used for the empirical analysis. Because comprehensive public infrastructure stocks are not published for El Paso, Texas, estimates for those variables are calculated using information regarding annual public capital investment data. Estimation results indicate that physical infrastructure investment may disrupt short-run economic growth, …
Standardized Lm Tests For Spatial Error Dependence In Linear Or Panel Regressions,
2013
Syracuse University
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 …
Public Health Expenditures, Public Health Delivery Systems, And Population Health,
2013
University of Kentucky
Public Health Expenditures, Public Health Delivery Systems, And Population Health, Glen P. Mays
Health Management and Policy Presentations
This seminar examines a series of approaches for estimating the health and economic effects attributable to public health expenditures in the U.S., along with a novel method for estimating economies of scale and scope in the delivery of public health services. The use of instrumental-variables techniques and network analytic methods are described in these research approaches.
Rhode Island Current Conditions Index -- January 2013,
2013
University of Rhode Island
Rhode Island Current Conditions Index -- January 2013, Leonard Lardaro
The Rhode Island Current Conditions Index
No abstract provided.
