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Examining Mobile Health App Engagement In A North American Employee Population: A One-Year Longitudinal Observational Study, Nabil Ratanshi

Electronic Thesis and Dissertation Repository

BACKGROUND: Mobile health (mHealth) apps may help promote physical activity and other health behaviours among office-based workers. Low app engagement, however, leading to little or no effect is typical. OBJECTIVE: To examine engagement with a rewards-based mHealth app and identify factors influencing engagement. METHODS: A one-year observational study was conducted with Canadian and U.S. users of the Sprout at Work app (N=2253; Female: 35.7%; Age: 39.3 years). Kaplan-Meier survival curves were used to examine engagement patterns from a ‘multiple-lives’ perspective (i.e., time to first disengagement, re-engagement, second disengagement). Regression models were used to identify factors influencing engagement. RESULTS: After one …

Essays On Financial Shocks And External Debt, Jafar El Armali

Electronic Thesis and Dissertation Repository

My thesis consists of three chapters: two chapters on the effects of financial shocks, and one on the relationship between external debt and economic growth in low- and middle-income countries.

Chapter 1, “Financial Shocks, Interbank Rates and Corporate Rates”, introduces financial shocks that change interbank and corporate debt rates and their spread and shows how these shocks affect economic fluctuations.

Chapter 2, “Tighter Debt Limits, Default, and Labour Supply”, shows that the effect of tighter debt limits on households' labour supply decisions depends on whether default is allowed or not.

Chapter 3, “External Debt, Initial Conditions, and Economic Growth in …

Statistical Roles Of The G-Expectation Framework In Model Uncertainty: The Semi-G-Structure As A Stepping Stone, Yifan Li

Electronic Thesis and Dissertation Repository

The G-expectation framework is a generalization of the classical probability system based on the sublinear expectation to deal with phenomena that cannot be described by a single probabilistic model. These phenomena are closely related to the long-existing concern about model uncertainty in statistics. However, the distributions and independence in the G-framework are quite different from the classical setup. These distinctions bring difficulty when applying the idea of this framework to general statistical practice. Therefore, a fundamental and unavoidable problem is how to better understand G-version concepts from a statistical perspective.

To explore this problem, this thesis establishes a new substructure …

Essays On The Economics Of Education, Enrique Martin Luccioni

Electronic Thesis and Dissertation Repository

My thesis consists of three chapters on the Economics of Education. In the first chapter, I take a structural approach to studying the extent to which teacher behavior and teacher interactions with students determine teaching contribution to test score growth in the classroom. Teachers’ contributions may differ across classrooms, as it may depend on the types of students taught and because teachers may adjust their effort to new contexts. The estimated model suggests that teacher and student efforts play a significant role in determining student knowledge. My findings indicate that teachers who are effective in teaching low-performing students may not …

Essays On Disability And The Labour Market, Robert Geoffrey Millard

Electronic Thesis and Dissertation Repository

My dissertation consists of three chapters about the effects of disability and disability policy.

The second chapter analyzes the variation in labour market outcomes across disabilities by representing disability as a bundle of characteristics. Rich with information on the characteristics of a disabling condition, I use the Participation and Activity Limitation Survey to compare the relative importance of each {characteristic} and their interactions on employment, wages, hours worked, and annual employment income. The disability {characteristics} include the type of activity limitation, number of limitations, timing of onset, severity, and persistence. I find substantial cross-sectional variation in labour supply, wages, and …

Community Development Agreements: The Hardening And Evaluation Of A Norm, Luka G. Petrusevski

Electronic Thesis and Dissertation Repository

Large scale mining projects generate highly variable outcomes. Proponents of mining cite benefits including job creation and revenue generation, while critics point to adverse social and economic impacts borne by mining-proximate communities. Community-based concerns about mining operations have raised ethical and social justice considerations relating to human-rights and consent. Community development agreements (CDAs) have emerged as an increasingly common tool to address such concerns and facilitate the delivery of tangible benefits from mining operations to affected communities. The effectiveness of CDAs, however, varies widely depending on the negotiated provisions and their implementation. This work contributes to the understanding of CDAs …

Essays On Industrial Organization And Health Economics, Cecilia S. Diaz Campo

Electronic Thesis and Dissertation Repository

My thesis consists of three chapters studying the impact of health insurance design and public health policy on consumers’ health and health care utilization, welfare, and costs.

Chapter 2 studies an overlooked dynamic incentive that encourages health care utilization, which I term \textit{dynamic moral hazard}. Typical health plans feature high deductibles and caps on consumers' out-of-pocket spending, which generate nonlinear pricing. These nonlinearities, coupled with the uncertainty intrinsic to future health care demand, encourage consumers to increase spending since current utilization lowers future expected prices. Standard models study health care utilization decisions through the lens of annual models, which abstract …

Revealed Preference Analysis: Theory And Applications, Charles Gauthier

Electronic Thesis and Dissertation Repository

This dissertation consists of three chapters studying revealed preference theory and its applications to testing and inference. The first chapter develops a semiparametric revealed preference methodology to analyze the effects of price search on prices paid across income groups. The second chapter derives a novel representation of the exponential discounting model to make inference on the discount factor. The third chapter derives an axiomatization of the exponential discounting model and uses it to propose a nonparametric test of dynamic discrete random utility models.

The first chapter develops a novel semiparametric approach to estimate the impacts of price search on prices …

Essays On Conflict Mediation, Ali Kamranzadeh

Electronic Thesis and Dissertation Repository

An important barrier to conflict resolution is asymmetric information. That is adversaries have private information about their objectives, resources, and strengths during the conflict and have incentives to misrepresent this information during the negotiations. Third-party institutions, like mediators, can help adversaries to reach an agreement by making a peace proposal. In this thesis, I explore the implication of asymmetric information of players to the design of an optimal peace proposal by a mediator.

Chapter 2, co-authored with Charles Zheng, studies a problem of conflict mediation where a mediator proposes a split of a good between two ex-ante identical contestants thereby …

Essays On The All-Pay Auction, Henk Schouten

Electronic Thesis and Dissertation Repository

Three all-pay auction models are examined. The first is a symmetric two-player binary-signal all-pay auction with correlated signals and interdependent valuations. The first chapter provides a complete characterization of each form of equilibrium and gives conditions for their existence. The main finding is that there generically exists a unique equilibrium. The unique equilibrium can only be one of four forms of equilibria. I apply my all-pay auction model to elections, where a candidate that receives good news from the polls behaves in a rationally overconfident manner and reduces her equilibrium effort. Consequently, the other candidate can win the election in …

Essays On Market Design And Auctions, Mingshi Kang

Electronic Thesis and Dissertation Repository

My thesis consists of three chapters that contribute to redistribution-driven market design and sponsored link auctions.

Chapter 2 and 3 (co-authored with Charles Zheng) study redistribution-driven market design with endogenous buyers and sellers. In Chapter 2, we consider a large market environment with each individual endowed with equal shares of a limited resources and allowed to buy or sell the shares. We characterize the interim (incentive-constrained) Pareto frontier subject to market clearance and budget balance, and find that at most two prices are needed to attain any (interim) Pareto optimum. Under robust conditions of the primitives, the Pareto optimal allocation …

Application Of A Polynomial Affine Method In Dynamic Portfolio Choice, Yichen Zhu

Electronic Thesis and Dissertation Repository

This thesis develops numerical approaches to attain optimal multi-period portfolio strategies in the context of advanced stochastic models within expected utility and mean-variance theories. Unlike common buy-and-hold portfolio strategies, dynamic asset allocation reflects the investment philosophy of a portfolio manager that benefits from the most recent market conditions to rebalance the portfolio accordingly. This enables managers to capture fleeting opportunities in the markets thereby enhancing the portfolio performance. However, the solvability of the dynamic asset allocation problem is often non-analytical, especially when considering a high-dimensional portfolio with advanced models mimicking practical asset's return. To overcome this issue, this thesis presents …

Cost-Effectiveness Analysis Of Tpmt Genotype-Guided Azathioprine Treatment Compared To Standard Treatment For Patients With Moderate/Severe Ulcerative Colitis, Ali Unsal

Electronic Thesis and Dissertation Repository

This study assessed cost-effectiveness of pharmacogenomics (PGx)-based azathioprine (AZA) compared to standard AZA therapy for ulcerative colitis (UC) patients in Canada. A patient-level Microsimulation model was developed to compare the lifetime costs and quality-adjusted life years (QALYs) gained by a hypothetical cohort of UC patients with age and sex characteristics. The parameters used in the model were derived from the published literature and costs from the Ontario Schedules of Payments and published sources. The results were summarized in terms of the incremental cost-effectiveness ratio (ICER). Compared to standard AZA, PGx-based AZA care was the dominant strategy with 0.17 incremental QALYs …