Cross-group paired individuals were administered an intervention to measure impacts of inmate interactions and friendships on anxiety and implicit bias among participants. Researchers predicted the intervention would decrease levels of racial anxiety, implicitness, prejudice, and racial color-blindness among entering freshmen in the College of Agriculture, Food & Environment at the University of Kentucky. Results indicated that the control group had no change in implicitness. The treatment group yielded no change in implicitness on four out of five experimental measures with the exception of decrease in communal orientation, thus altering the implicit bias of participants.

I examined whether perceptions of intergroup similarity and conflict interact to predict prejudice and facilitation of an intergroup social interaction as a consequence of physiological linkage – a state correlated with successful social interactions wherein two people's autonomic nervous systems synch-up in time. Studies 1 and 2a, revealed an association between similarity, conflict and low prejudice. In Study 2b participants completed essays priming similarity and conflict in order to test the indirect effect of their interaction with participants' physiological reactivity on the success of a dyadic social interaction. Similarity, conflict and physiological reactivity interacted to predict physiological linkage, which in turn moderated the effects of conflict on the success of the social interaction. These results suggest that physiological and social cognitive processes play key roles in determining the important moment when an outgroup stranger becomes a potential friend.

I examined whether perceptions of intergroup similarity and conflict interact to predict prejudice and facilitation of an intergroup social interaction as a consequence of physiological linkage – a state correlated with successful social interactions wherein two people's autonomic nervous systems synch-up in time. Studies 1 and 2a, revealed an association between similarity, conflict and low prejudice. In Study 2b participants completed essays priming similarity and conflict in order to test the indirect effect of their interaction with participants' physiological reactivity on the success of a dyadic social interaction. Similarity, conflict and physiological reactivity interacted to predict physiological linkage, which in turn moderated the effects of conflict on the success of the social interaction. These results suggest that physiological and social cognitive processes play key roles in determining the important moment when an outgroup stranger becomes a potential friend.

This dissertation comprises three essays on theoretical analysis of middlemen in intermediated markets. Chapter 1 gives a brief survey on the market intermediation literature and also briefly describes the subsequent chapters. In Chapter 2 I study the role of horizontally differentiated middlemen in a bilateral search market in which heterogeneous agents of each group possess private information concerning the value of joint production. I focus on the effect of the middlemen on agents' search efforts and on pricing decisions by middlemen. In particular, I show that the middlemen intensify agents' search activities. I also provide an explanation for why middlemen often use asymmetric pricing for two groups in a market. In Chapter 3 I study a model of platform competition when both indirect network effect and the desirability concerns of the agents are present. The desirability concerns are defined as the perceived quality of platforms. A platform with a higher proportion of high-type agents is regarded as a platform with a better quality. Under these circumstances, I derive conditions for the existence of equilibrium. In a dominant platform equilibrium, I show that some agents may not be served by the dominant platform. I also show that two platforms with different perceived quality may coexist in equilibrium. It suggests that endogenous market segmentation may arise in two-sided markets. In chapter 4 I study the effort-maximizing contest rule when there is a positive externality between aggregate efforts and the contest audience: the audience is more willing to pay for watching a contest if each participating contestant expends more effort. The Tullock rent-seeking contest with endogenous entry is extended by incorporating the contest audience into the model. In order to fund the contest, the organizer with no budget has to collect fees from one or both of two groups. It is shown that the effort-maximizing contest rule under a positive externality attracts only two entrants and, in the unique subgame perfect equilibrium, the entrants are always subsidized regardless of the size of entry costs, and the audience pay a positive fee. / Ph. D.

Cross-group relationships are defined by romantic relationships involving two individuals from distinct racial or ethnic groups. For this paper, the terms “interethnic” and “interracial” are used as specifiers for the umbrella terms, “intergroup” and “cross-group.” Studies examining whether cross-group romantic relationships are more or less satisfying than intergroup romantic relationships have yielded discrepant findings. Through a systematic review and meta-analysis of 27 studies, we found that there are no significant difference between cross-group and intergroup relationship satisfaction (aggregate d = .024, 95% CI [-0.076; 0.123]). Tests of moderation found that the amount of Asian participants included in individual studies on cross-group relationship satisfaction is significantly associated with effect size d (β = .005, p = .02; 95% CI [.001; .008]).

The aim of this thesis was to investigate whether self-report measures of contact are valid for use in research testing the ‘contact hypothesis’. The vast majority of contact research has relied on the assumed validity of self-report methods of data collection (Pettigrew & Tropp, 2006), even though the potential weaknesses of self-report methodology generally have been well documented. This reliance is necessary, as self-reports remain the only practical method so far developed of measuring certain of the facilitating conditions developed by Allport (1954/1979), and particularly of direct and indirect cross-group friendship (Pettigrew, 1998; Wright, Aron, McLaughlin-Volpe, & Ropp, 1997). However, if self-reports are not a valid method for measuring contact, the derived implications of a large portion of the research effort are potentially flawed. This thesis attempted to address this important oversight, using a variety of methods to investigate whether the use of self-reports in future research on intergroup contact is appropriate. Studies 1 and 2 demonstrated that self-reports of contact show considerable resistance to context effects, particularly in comparison with self-reports of the more subjective construct of attitudes. Studies 3-5 demonstrated that self-reports of contact agree with the observer-reports of a single observer who knows the target intimately – the spouse or parent. Studies 6 and 7 replicate this agreement through the consensually supported observer-reports of three close friends of the target, thereby reducing any variance due to individual response biases. Finally, studies 8 and 9 demonstrate the concurrent criterion-related validity of self-reports of contact, in that they are able to predict contact on a very large online network called Facebook, on which real-world rather than purely online friendships are primarily represented. These findings offer considerable support for the validity of self-reports as a suitable method for measuring contact. As self-reports remain the only method which has thus far proven suitable for the measurement of those aspects of contact which are essential for exploration of the contact hypothesis, this thesis presents a very heartening and optimistic conclusion and supports the continued use of self-reports in contact research.