Theses and Dissertations from UMD
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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM
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Item Essays in Behavioral Economics(2017) Tonguc, Ozlem; Ozbay, Erkut Y; Economics; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)This dissertation consists of three studies in behavioral and experimental economics. In the first chapter, I study how vote buying may occur in environments where promises cannot be enforced and investigate how different kinds of behavioral biases lead to the use of different types of payments (pre-voting transfers vs. promises of post-voting transfer). I provide a simple model of the vote buying exchange as a one-shot interaction of a buyer and a voter, where voting is costly and done in private, and the buyer may make offers with different payments types. I investigate the effects of three behavioral biases on buyer and voter behavior: inequity aversion, guilt aversion and voter reciprocity. Using a laboratory experiment, I present evidence that support the presence of all three behavioral biases. The second chapter is a joint work with Erkut Ozbay. We study the optimality of pre- and post-voting payments to buy votes in an environment where both the buyer and the voter are able to commit to their promises. Using a modified version of the model used in Chapter 1, we investigate the implications of different risk attitudes and inequity aversion on agent behavior. We test the predictions of different preferences using a lab experiment. Our results support the presence of inequity aversion in this environment. In the third chapter, I study whether and under what conditions a decision maker may decline a transfer made to her by another person. I identify the behavioral biases of inequity aversion, guilt aversion and reciprocity as possible explanations: an inequity averse decision maker may reject if the resulting allocation is very inequitable, while a guilt averse one may reject if she believes that she cannot fulfill the other person’s payoff expectations, and a reciprocal decision maker may reject if she believes the other person made the transfer with good intentions, but she cannot respond in kind. By modifying a widely used experimental two-player game introduced to study trust and reciprocity, I show that a decision maker takes the cost of reciprocating a transfer into consideration when deciding whether to accept, regardless of whether she is reciprocal, inequity averse, or guilt averse. However, the three biases have different implications for how the decision maker's belief about the other player’s material payoff expectations affect her behavior. Using a laboratory experiment, I confirm that both guilt aversion and reciprocity motives are present, and they are able to explain different aspects of the behavior.Item RECIPROCITY IN ONLINE MARKETS: EMPIRICAL STUDIES OF AUCTION AND BARTER MARKETS(2013) Ye, Shun; Viswanathan, Siva; Hann, Il-Horn; Business and Management: Decision & Information Technologies; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)My dissertation seeks to understand how reciprocity affects transaction outcomes and mechanism design in online markets. The first essay examines negative reciprocity illustrated as feedback-revoking behavior in the eBay auction market, focusing on its impact and implications for reputation system design. I utilize the biggest policy change of eBay's reputation system in its history as a natural experiment setting to infer the causal impact of the reputation system on seller behavior. I find that strategic engagement in negative reciprocity enables low quality sellers to manipulate their reputations and masquerade as high-quality sellers. I further show that these sellers react strongly to eBay's announcement of a ban on revoking. Interestingly, disallowing negative reciprocity motivates these sellers to significantly improve their service quality. The second essay examines positive reciprocity in one of the leading online barter markets for books, focusing on participants' different reciprocity strategies and their impacts on transaction outcomes. I find that, whereas market participants who use the immediate reciprocity strategy are able to motivate higher service quality for the current transaction from the other partner, participants who use the delayed reciprocity strategy derive more benefits for future transactions by fulfilling their wishlists sooner. I further show that the market participants can be segmented into different reciprocity strategies based on their book avidness, breadth of interest, and psychographic profiles. Overall, the two studies provide important theoretical and practical implications for the design and regulation of online markets.Item The Link Between Relationship Orientations and Friendship Quality: The Mediating Roles of Social Goals and Resolution Strategies(2013) Fredstrom, Bridget Kay; Torney-Purta, Judith; Human Development; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)During adolescence, friendships become increasingly important to overall well-being, yet it is common for individuals to experience frequent conflicts with their friends. Theories relating to social cognition offer a framework to examine how adolescents think about expectations for reciprocity as well as goals and strategies in response to hypothetical conflicts (and how these social cognitions are associated with friendship quality). Participants included 198 adolescents from 6th, 7th, and 8th grades from two racially diverse schools in a southern state. All participants had parental consent and provided verbal assent. They provided nominations of two same-sex best friends in their grade who attended their school and rated their perceptions of four dimensions of positive friendship quality for each. Participants also completed an exchange and a communal orientation scale (revised from adult versions) responding with reference to each of their nominated friends. Finally, participants read four hypothetical conflicts and were asked to imagine that they and their nominated friend were described. They rated the likelihood that they would choose each of a set of specific social goals and strategies in resolving conflict. Hierarchical linear regressions examined whether adolescents' exchange and communal orientations predicted their perceptions of positive friendship quality. Moderated-mediation analyses examined whether individual differences in social goals and resolution strategies mediated the associations between exchange and communal orientations and positive friendship quality (and also gender differences). Exchange and communal orientations had different associations with friendship quality. Choice of social goals appears to be one process through which relationship orientations are associated with friendship quality. Exchange orientation was not significantly associated with positive friendship quality. However, mediation models revealed that adolescents with higher expectations for tit-for-tat exchanges were more likely to endorse revenge goals which in turn were associated with lower friendship quality. In contrast, communal orientations were positively and significantly associated with overall rated friendship quality, suggesting the importance of reciprocity in meeting the needs of others. Finally, gender differences suggest that relationship orientations partially explain why adolescent males and females have qualitatively different friendships, and managed conflict differently. Limitations, implications, and future directions for analyses and research are discussed