Three Essays On Online Ratings and Auction Theory

This work includes three papers, focusing on online ratings and auction theory. The first chapter, "Why Do People Write Reviews? Theory and Evidence on Online Ratings" examines what motivates consumers to provide uncompensated ratings for products on in the internet. It finds that both a desire to inform other buyers and to punish or reward sellers are at play.The second chapter "All Equilibria of the Multi-Unit Vickrey Auction" characterizes all Nash Equilibria for the Vickrey auction with three or more bidders and any number of units. It shows that all equilibria fall into one of two basic families, and that there cannot be equilibria of any other type.The third chapter "Optimal Availability of Online Ratings" looks at what role consumer ratings have in determining market outcomes. It shows that more information for buyers does not always lead to increased buyer welfare, and that in some cases it may be preferable to keep some buyers uninformed of existing ratings

Why Do People Adopt, or Reject, Smartphone Password Managers?

People use weak passwords for a variety of reasons, the most prescient of these being memory load and inconvenience. The motivation to choose weak passwords is even more compelling on Smartphones because entering complex passwords is particularly time consuming and arduous on small devices. Many of the memory- and inconvenience-related issues can be ameliorated by using a password manager app. Such an app can generate, remember and automatically supply passwords to websites and other apps on the phone. Given this potential, it is unfortunate that these applications have not enjoyed widespread adoption. We carried out a study to find out why this was so, to investigate factors that impeded or encouraged password manager adoption. We found that a number of factors mediated during all three phases of adoption: searching, deciding and trialling. The study’s findings will help us to market these tools more effectively in order to encourage future adoption of password managers

Understanding the Association between Star Ratings and Review Helpfulness: The Perspectives of Expectation Confirmation Theory and Negativity Bias

Consisting of textual, multimedia, and numerical information elements, online consumer reviews (OCR) have been considered an essential information source of products for prospective consumers. Researchers have made significant efforts to comprehend how these information elements are associated with OCRs’ information value or helpfulness. However, there is a paucity of theoretical evidence on consumers’ perception and evaluation of star ratings and their information, even though star ratings as numerical information cues can imply multiple meanings. In this study, we leverage (1) expectation-confirmation theory to delineate star ratings as the extent of consumer satisfaction and (2) negativity bias to explain the relationship between star ratings and helpfulness. Using 45,621 reviews of 20 products across three categories, we empirically find that our theoretical approaches improve our understanding of the effect of star ratings on helpfulness. Therefore, this study contributes to the extant literature on OCRs by providing the theory-based evaluation of star ratings in relation to helpfulness

The social psychology of music and musical taste

This thesis is concerned with the social psychology of music and musical taste. It deals with four main research questions: (1) Why do people listen to music? (2) Do stereotypes of musical taste influence how individuals judge other people and themselves? (3) Do people exhibit in-group favouritism towards those who share their musical taste? and (4) Do stereotypes of musical taste influence how individuals perceive other people? The findings of this thesis serve to highlight musical taste as an important socio-cultural construct that is likely to influence social cognition, perception and intergroup behaviour. The thesis also provides further insight as to why people listen to music, and why it is so important to them. This thesis serves to highlight the potential for music psychologists to use well-established theories from mainstream social psychology to understand musical behaviour

Bias in Online Freelance Marketplaces: Evidence from TaskRabbit and Fiverr

Online freelancing marketplaces have grown quickly in recent years. In theory, these sites offer workers the ability to earn money without the obligations and potential social biases associated with traditional employment frameworks. In this paper, we study whether two prominent online freelance marketplaces - TaskRabbit and Fiverr - are impacted by racial and gender bias. From these two platforms, we collect 13,500 worker profiles and gather information about workers' gender, race, customer reviews, ratings, and positions in search rankings. In both marketplaces, we find evidence of bias: we find that gender and race are significantly correlated with worker evaluations, which could harm the employment opportunities afforded to the workers. We hope that our study fuels more research on the presence and implications of discrimination in online environments

How Tradeoffs Shrink Attribute Hierarchy

Why do people sometimes struggle with decisions that once seemed relatively simple? This research suggests that comparing options leads people to lose sight of which decision attributes are important. Although the difference between important and unimportant attributes is often clear in the abstract, the act of making tradeoffs highlights what people must forgo on one attribute in exchange for a gain on another, which increases the perceived importance of trivial attributes in particular. This causes the variance in perceived importance across attributes to shrink, blurring the distinction between important and unimportant attributes. Four experiments demonstrate this phenomenon, explore the underlying mechanism, and show how it leads to increased choice difficulty and dissatisfaction with the choice experience

Why do people fail to turn good intentions into action? : The role of executive control processes in the translation of healthy eating intentions into action in young Scottish adults

Non peer reviewedPublisher PD

Behavioral Perspectives on Risk Prone Behavior: Why Do People Take Risks?

Utilizing the principles and concepts of behavioral economics and operant psychology, researchers in both fields initiated the creation of the optimal foraging theory. This theory describes foraging behaviors mostly within animals other than humans. However, within recent empirical studies, optimal foraging theory has been modified to explain risky choices and decision-making processes within the context of risk-sensitive foraging theory for both animals and humans alike. Although most individuals belonging to the homo sapiens species would not like to admit that their behavior is very animalistic in nature, there is a great deal of veracity behind this idea, ranging from explaining gambling behavior to addictive behaviors to even homicide. Risk prone behavior describes behavior elicited for the potential gain of rewards under certain conditions, usually competitive in nature. The purpose of the current paper is to shed some light on this topic and how it relates to the most primitive of behaviors exhibited by human beings

Educationism and the irony of meritocracy: negative attitudes of higher educated people towards the less educated

Social psychology has studied ethnic, gender, age, national, and other social groups but has neglected education-based groups. This is surprising given the importance of education in predicting people’s life outcomes and social attitudes. We study whether and why people evaluate education-based in-groups and out-groups differently. In contrast with popular views of the higher educated as tolerant and morally enlightened, we find that higher educated participants show education-based intergroup bias: They hold more negative attitudes towards less educated people than towards highly educated people. This is true both on direct measures (Studies 1-2) and on more indirect measures (Studies 3-4). The less educated do not show such education-based intergroup bias. In Studies 5-7 we investigate attributions regarding a range of disadvantaged groups. Less educated people are seen as more responsible and blameworthy for their situation, as compared to poor people or working class people. This shows that the psychological consequences of social inequality are worse when they are framed in terms of education rather than income or occupation. Finally, meritocracy beliefs are related to higher ratings of responsibility and blameworthiness, indicating that the processes we study are related to ideological beliefs. The findings are discussed in light of the role that education plays in the legitimization of social inequality

"She Said WHAT'' "He Did THAT'' Believing False Rumors

Why do false rumors spread? Why do otherwise sensible people believe them? Why are they sometimes impervious to correction? There are several answers with significant implications for freedom of speech and the marketplace of ideas, especially in the age of the Internet; they demonstrate that the exchange of information may not produce convergence on truth and that damaging false reports will often be widely credited. In some circumstances, a "chilling effect" on false rumors can be desirable; the goal should be to produce optimal chill, rather than no chill at all.