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Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Three Essays On Model Selection, Fangning Li
Three Essays On Model Selection, Fangning Li
Legacy Theses & Dissertations (2009 - 2024)
In empirical research, we often need to address the issue of what model to use given a collection of candidate models. Conventionally, we use model selection to choose one best model from the collection of candidate models based on some model selection criteria. Model averaging is a generalization of model selection in the sense that it assigns weights to candidate models and uses a weighted average to construct an aggregated model. Usually model averaging provides better performance than model selection which chooses a single candidate model based on AIC or BIC.
A Comparative Spatial And Climate Analysis Of Human Granulocytic Anaplasmosis And Human Babesiosis In New York State (2013-2018), Collin J. O'Connor
A Comparative Spatial And Climate Analysis Of Human Granulocytic Anaplasmosis And Human Babesiosis In New York State (2013-2018), Collin J. O'Connor
Legacy Theses & Dissertations (2009 - 2024)
Human granulocytic anaplasmosis (HGA) and human babesiosis are tick-borne diseases spread by Ixodes scapularis (the blacklegged or deer tick) and are the result of infection with Anaplasma phagocytophilum and Babesia microti, respectively. In New York State (NYS), incidence rates of these diseases increased concordantly until around 2013, when rates of HGA began to increase more rapidly than human babesiosis, and the spatial extent of the diseases diverged. Surveillance data of tick-borne pathogens (2007 to 2018) and reported human cases of HGA (n=4,297) and human babesiosis (n=2,986) (2013 to 2018) from the New York State Department of Health (NYSDOH) showed a …
Parsimonious Covariate Selection For Interval Censored Data, Yi Cui
Parsimonious Covariate Selection For Interval Censored Data, Yi Cui
Legacy Theses & Dissertations (2009 - 2024)
Interval censored outcomes widely arise in many clinical trials and observational studies. In many cases, subjects are only followed-up periodically. As a result, the event of interest is known only to occur within a certain interval. We provided a method to select the parsimonious set of covariates associated with the interval censored outcome. First, the iterative sure independence screening (ISIS) method was applied to all interval censored time points across subjects to simultaneously select a set of potentially important covariates; then multiple testing approaches were used to improve the selection accuracy through refining the selection criteria, i.e. determining a refined …
An Analysis Of Income And Other Associative Demographics To Charity Donation And Volunteerism, Christine Lynn Klotz
An Analysis Of Income And Other Associative Demographics To Charity Donation And Volunteerism, Christine Lynn Klotz
Legacy Theses & Dissertations (2009 - 2024)
Nongovernmental organizations have a vast institutional presence across the United States. Each year, there is an ever-increasing body of charitable organizations which span, enhance and characterize the civil sphere. Overall, charities occupy an important institutional role in society, and the individuals who help to sustain charities encompass a vital social role. This paper is particularly concerned with analyzing charitable donation and volunteering dynamics on the individual level. Using the 2014 General Social Survey data on charitableness, this paper estimates the probability of engaging in volunteerism and charitable donation within the nonprofit sector based on income level. These results suggest that …