Social and Behavioral Sciences Commons^™

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 …

Cnn-Lstm Vs Ann: Option Pricing Theory, Edward Chang

Undergraduate Student Research Internships Conference

The modern derivatives market has been steadily growing since the development of the first accurate option pricing model by Fischer Black, Robert Merton, and Myron Scholes. Since then, there have been many different approaches to more accurately price options like the binomial option pricing model and approaches using technology such as machine learning. There are many different research papers on option pricing with artificial neural networks (“ANN”) but not many with other neural network types. We contribute to the existing literature by developing a convolutional neural network – long short-term memory (“CNN-LSTM”) model to price options and compare it to …

Analysis Of Credit Risk And Single / Two Factor Model, Siwen Chen

Undergraduate Student Research Internships Conference

Since 2008, businesses and banks must manage and track more risk than ever before. Financial risk management helps companies and banks decrease the risk of investment and trade. Additionally, financial risk management gives a guide on how to forecast and manage the risk efficiently. More specifically, the three major risks are market risk, credit risk, and operational risk. This report will focus on the credit risk: introducing the definition of credit risk, single factor model, the relationship between coefficient and default probability, and the relationship of m coefficient and default probability. Using the single factor model, we will extend the …

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 …

How Do Ontario Cities View Environmental Sustainability?, Spencer Cook

Undergraduate Student Research Internships Conference

Economic development has traditionally involved a trade-off between economic growth and the environmental quality. It is important to research how growth and development can be achieved in a way that preserves the natural environment. This research studies how cities in Ontario conceptualize sustainability, the challenges in its implementation, and examples of policies. Using a content analysis of economic development strategy documents of 48 Ontario cities, themes will emerge that can be used to draw conclusions about perceptions on sustainability in the province. The results of the content analysis show that sustainability is a low priority, with cities often referring to …

A Psychological Profile Of The Digitized Economy: Who Buys Cryptocurrencies, Nfts, And Meme-Stocks (And Why)?, Nicole Wolfe

Undergraduate Student Research Internships Conference

As the global digital economy continues to grow in interest and financial worth, it is imperative to harvest data to gain early information on this nuanced economy. Already, we have witnessed billions of dollars in losses and wins at the blink of an eye, encouragement to invest from well-known celebrities and politicians, and high anxiety from the newness, power consumption, and potential outcomes of this nuanced system. Stemming from the lack of solid evidence in this emerging field, we hope to gain more insight on the early players and variation within the digitized economy. Similarly, we hope to identify specific …

Child Cognitive Achievement Gaps: The Role Of Family Structure And Maternal Locus Of Control In Parental Investment, Nalinda K. Murray

Undergraduate Student Research Internships Conference

Little exploration has been done to determine the impact of family structure on parental investment decisions and how gaps in children’s cognitive achievement are affected in turn. To examine the role of family structure, this paper estimates the production function for children’s cognitive achievement using a value-added specification with instrumental variables estimation. A novel feature of this research is that variation in family structure and maternal locus of control are exploited in an effort to account for the endogeneity of parental investment and children’s cognitive performance. Applying my methodology to data from the National Longitudinal Survey of Youth 1979 and …

The Effect Of Leverage On Credit Default Swaps, Xiling Lai

Undergraduate Student Research Internships Conference

The research investigates the effect of leverage on the pricing of Credit Default Swaps (CDS) and focuses on key sectors of the economy: Technology, Financials, Consumer Staples and Industrials. CDS are financial instruments that were developed a few decades ago and have become more widely used in financial markets for hedging credit exposures. Given their prevalence in financial markets, it is important to understand how CDS spreads change when reference entities modify their capital structure.

In the regression analysis, the level of CDS spread is used as dependent variable, and the standardized relative leverage is used as independent variable. My …

Simulating Salience: Developing A Model Of Choice In The Visual Coordination Game, Adib Sedig

Undergraduate Student Research Internships Conference

This project is primarily inspired by three papers: Colin Camerer and Xiaomin Li’s (2019 working paper)—Using Visual Salience in Empirical Game Theory, Ryan Oprea’s (2020)—What Makes a Rule Complex?, and Caplin et. al.’s (2011)—Search and Satisficing. Over the summer, I worked towards constructing a model of choice for the visual coordination game that can model player behavior more accurately than traditional game theoretic predictions. It attempts to do so by incorporating a degree of bias towards salience into a cellular automaton search algorithm and utilizing it alongside a sequential search mechanism of satisficing. This …

A Study Of Canadian Bankruptcies, 2014-2022, Luis Guilherme Mazzali De Almeida

Undergraduate Student Research Internships Conference

This paper studies Canadian monthly bankruptcy data from January 2014 to February 2022 with an aim towards identifying the existence of underlying heterogeneity in the decision-making of firms across different industry sectors during periods of economic adversity. The data used include provincial two-digit NAICS bankruptcy level data, provincial pandemic-related data concerning the evolution of cases and stringency of adopted policies, and external factors pertaining to the domestic and foreign economies such as industry GDP, the overnight rate target, exchange rates, imports and exports, prices, and bond liquidity premium. The method is two-fold. First, we identify changes in bankruptcy trends caused …

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 …

2022-1 A Partial Identification Approach To Identifying The Determinants Of Human Capital Accumulation: An Application To Teachers, Nirav Mehta

Department of Economics Research Reports

This paper views teacher quality through the human capital perspective. Teacher quality exhibits substantial growth over teachers’ careers, but why it improves is not well understood. I use a human capital production function nesting On-the-Job-Training (OJT) and Learning-by-Doing (LBD) and experimental variation from Glewwe et al. (2010), a teacher incentive pay experiment in Kenya, to discern the presence and relative importance of these forces. The identified set for the OJT and LBD components has a closed-form solution, which depends on experimentally estimated average treatment effects. The results provide evidence of an LBD component, as well as an informative upper bound …

2022-2 Robust Contracts In Common Agency, Keler Marku, Sergio Ocampo, Jean-Baptiste Tondji

Department of Economics Research Reports

Business activities often involve a common agent managing a variety of projects on behalf of investors with potentially conflicting interests. The extent of the agent’s actions is also often unknown to investors, who have to design contracts that provide incentives to the manager despite this lack of crucial knowledge. We consider a game between several principals and a common agent, where principals know only a subset of the actions available to the agent. Principals demand robustness and evaluate contracts on a worst-case basis. This robust approach allows for a crisp characterization of the equilibrium contracts and payoffs and provides a …

2022-7 Market Power, Taxation And Product Variety In The Brazilian Automobile Industry, Daniel Chaves

Department of Economics Research Reports

This paper empirically assesses the impact of a discontinuous tax schedule on prices, markups and product assortment in the Brazilian automobile industry. To this end, I estimate a structural, equilibrium model of demand and supply for over a hundred different models and engine sizes of automobiles. With the model estimates of price elasticities and marginal costs I quantify how market power impacts the progressivity of the discontinuous tax schedule. I also examine how firms would reposition their products to avoid the tax and quantify the impact of this repositioning on equilibrium outcomes.

2022-5 Estimation Of Parametric Binary Outcome Models With Degenerate Pure Choice-Based Data With Application To Covid-19-Positive Tests From British Columbia, Nail Kashaev

Department of Economics Research Reports

I propose a generalized method of moments type procedure to estimate parametric binary choice models when the researcher only observes degenerate pure choices-based or presence-only data and has some information about the distribution of the covariates. This auxiliary information comes in the form of moments. I present an application based on the data on all COVID-19-positive tests from British Columbia. Publicly available demographic information on the population in British Columbia allows me to estimate the conditional probability of a person being COVID-19-positively tested conditional on demographics

2022-6 Prices, Profits, Proxies, And Production, Victor H. Aguiar, Nail Kashaev, Roy Allen

Department of Economics Research Reports

This paper studies nonparametric identification and counterfactual bounds for heterogeneous firms that can be ranked in terms of productivity. Our approach works when quantities and prices are latent, rendering standard approaches inapplicable. Instead, we require observation of profits or other optimizing-values such as costs or revenues, and either prices or price proxies of flexibly chosen variables. We extend classical duality results for price-taking firms to a setup with discrete heterogeneity, endogeneity, and limited variation in possibly latent prices. Finally, we show that convergence results for nonparametric estimators may be directly converted to convergence results for production sets.

2022-3 A Random Attention And Utility Model, Nail Kashaev, Victor H. Aguiar

Department of Economics Research Reports

We generalize the stochastic revealed preference methodology of McFadden and Richter (1990) for finite choice sets to settings with limited consideration. Our approach is nonparametric and requires partial choice set variation. We impose a monotonicity condition on attention first proposed by Cattaneo et al. (2020) and a stability condition on the marginal distribution of preferences. Our framework is amenable to statistical testing. These new restrictions extend widely known parametric models of consideration with heterogeneous preferences.

2022-8 Slutsky Matrix Symmetry: A New Behavioral Condition, Victor H. Aguiar, Roberto Serrano

Department of Economics Research Reports

The Slutsky matrix function encodes all the information about local variations in demand with respect to small (Slutsky) compensated price changes. When the demand function is the result of utility maximization the Slutsky matrix is symmetric. However, symmetry does not imply rationality. Here, we provide a necessary and sufficient condition for Slutsky symmetry. The new condition requires symmetric attention to compensated price-paths.

2022-9 A Rationalization Of The Weak Axiom Of Revealed Preference, Victor H. Aguiar, Per Hjertstrand, Roberto Serrano

Department of Economics Research Reports

Samuelson’s (1938) weak (generalized) axiom of revealed preference– WGARP–is a minimal and appealing consistency condition of choice. We offer a rationalization of WGARP in general settings. Our main result is an exact analog of the celebrated Afriat’s theorem, but for WGARP. Its ordinal rationalization is in terms of an asymmetric and locally nonsatiated preference function. Its cardinal rationalization uses a coalitional multi-utility (CMU) maxmin representation with a coherency restriction on the coalition structure. Effectively, the CMU representation aggregates piecemeal preferences within the decision maker (multiple rationales without preference reversals that allow for transitivity violations). Basic consumer theory and welfare analysis …

2022-11 Peter Howitt – A Keynesian Still In Recovery, David Laidler

Department of Economics Research Reports

Peter Howitt is best known for his contributions to growth theory, but his work in short-run economics, which began with his Ph.D thesis and still continues, is important and deserves attention. It lies firmly in the Keynesian macro-disequilibrium tradition of Clower and Leijonhufvud, and for a long time has been overshadowed by New-classical and New-Keynesian orthodoxy. However, the development of agent based modelling and behavioural economics will perhaps give disequilibrium macroeconomics a new lease on life.