Cyberspace has dramatically improved our daily lives in the past several decades. Meanwhile, people’s personal identifiable information (PII) is exposed online and is at risk of identity theft and cybercrimes. The Identity Ecosystem developed by the Center for Identity in the University of Texas at Austin addresses this problem and provides a statistical framework for understanding the value, risk and mutual relationships of PII. The Identity Ecosystem currently uses a general Bayesian Network Model to simulate the relationships among PII, which may be quite inaccurate for specific groups of people. This thesis proposes a solution that specializes the Bayesian Network used for particular groups of people. Both one-dimension specialization and multi-dimension specialization are investigated. Research problems like how to choose specialization criterion, how to set specialization boundaries, and how to overcome the difficult of insufficient data, are carefully studied. Specialization functionality is demonstrated based on empirical data. Finally, experiments of specialization are conducted on data obtained from online stories. This work is important in the sense that it provides a guide-line of designing more accurate models of PII within the Identity Ecosystem. / text

Division of labor and division of knowledge are so important and common in society today that it is difficult to imagine a functional society where everyone knows the same things and performs the same tasks. In such a society everyone grows, or gathers, and prepares their own food, makes their own tools, builds their own house, and so on. Cultural evolution is the field of research that studies the creation and diffusion of ideas and societies. It is very uncommon for these studies to take into account the effects of specialization. This thesis will show that specialization is of great importance to cultural evolution. The thesis is divided into two parts: The first is an introduction to studies of specialization and division of labor. The thesis begins with an interdisciplinary survey of the research on division of labor and specialization, including both theoretic and empirical studies. Next is an introduction to modeling specialization and division of labor. This includes a general framework and a number of basic models of different aspects of specialization and division of labor. Part two consists of four papers. The first paper studies the interaction between specialization and cultural cumulation. The second and third papers examine cultural cumulation, specifically the circumstances under which cultural knowledge increases and how cultural knowledge is distributed in the population. The last paper is a mathematical model of how specialization of knowledge (i.e. higher education) leads to social stratification.

The submitted thesis deals with the luxury 5-star hotel Radisson SAS Alcron. Its aim is to analyse the level of cooperation of the hotel, to suggest potential steps to its improvement, and also to find idle possibilities of cooperation which the hotel could apply in its entrepreneurial activities. The purpose of the thesis is also to asses to what degree the cooperation is influenced by specialization. The whole text is divided into 5 chapters whereas each of them deals with cooperation on different level, starting with international, through national to regional cooperation in tourism, and ending with an analysis of the cooperation of the hotel.

Despite the long history of stocking trout and the popularity of stocked-trout fishing in Virginia, no study has investigated the use of the program nor attempted to describe anglers actively seeking stocked trout. Agencies have stocked trout in Virginia since the 1920s and today, Virginia Department of Game and Inland Fisheries (VDGIF) stocks the majority of the fish in the state, stocking over 1 million catchable-sized trout on over 180 waters. Given the expansive effort of VDGIF and the popularity of the program, VDGIF desired to understand how anglers utilize their program and who actively fishes for stocked trout. My objectives were 1) to assess catch, harvest, effort, and return-to-creel rates of stocked trout on various fishery and water body types, across seasons and number of days post-stocking in stocked waters in western Virginia, 2) to identify market segments of anglers seeking stocked trout based upon their demographic characteristics, motivations, and degree of specialization, 3) to compare satisfaction and management preferences of the market segments of anglers seeking stocked trout in Virginia and 4) to recommend stocking and management strategies that best meet the desires of stocked-trout anglers in Virginia and that produce managerially desired catch rates to the Virginia Department of Game and Inland Fisheries. I conducted on-site surveys on 17 stocked-trout waters across Virginia. Most anglers reported high levels of satisfaction with their fishing experience that day and with the program in the last 12 months. The majority of anglers caught something that day. Anglers had diverse fishing and management preferences. Stocking density did not affect catch rate on lakes nor streams. Time following a stocking event did influence catch rate and effort; anglers caught fish the quickest on the day of stocking, but catch rate remained near 1 trout per angler-hr and did not significantly differ from the day after stocking to 30 days after stocking. Catch rate positively correlated with angler satisfaction, yet the majority of the anglers were highly satisfied, even if they did not catch any fish. We identified four groups of anglers: casual anglers, consumptive-experienced anglers, avid anglers, and specialists. Social investment, experience, and fishery resource use varied among the four groups. The four groups also had differing motivations for fishing, fishing preferences, management preferences, and levels of satisfaction. Multinomial logistic regressions showed that specialization, age, catch rate, importance an angler places on catching something, and waterbody type contributed to the best model for predicting angler satisfaction. Anglers on streams typically expressed greater satisfaction than anglers on lakes. Angler satisfaction negatively correlated with the importance an angler placed on catching something. / Master of Science

The determinants of success in venture capital financing are explored in this manuscript. 1247 venture capital funds formed over a twenty-year time period are empirically analyzed with results that support theoretical research from extant finance and economics literature. Venture capitalists' choices of portfolio size, distance from portfolio firms, location, and to some extent, level of diversification in their investment portfolio, are all significant factors in explaining the success rates of venture capital funds. These results are robust even when controlling for other characteristics of venture funds and entrepreneurial firms, such as the stage of development and industry of the portfolio firms, which may affect success rates of venture capitalist portfolios.

Rock climbing participation is growing throughout the United States. Information on the participation patterns and preferences of groups of climbers can be used to help mangers make better informed decisions, allowing them to cater to the specific interests of climbing participants, ensure participant satisfaction and encourage continued patronage. This study explores variation in participant characteristics across segments of the climbing population. Because an individual's level of specialization will align him with other like-minded participants, an understanding of a participant's stages of involvement and level of specialization assists in understanding the social world's views and behaviors toward the resource and toward other participants. Information on participants' level of experience, level of commitment, and demographic dimensions can be used to better understand and manage climbers. This study aimed to identify differences among groups of climbers. The study measured across 484 participants. The participants were described by various dependent variables, which included demographic factors, level of specialization, motivations for climbing, types of conflicts and constraints experiences, and setting preferences. Measuring the climbers' participation patterns identified participant sub-world groups. The four groups of climbing participants, as identified by this study, were: infrequent climbers, frequent outdoor climbers, frequent indoor climbers, and avid climbers. While demographics are not significantly descriptive of climbing sub-world affiliations, this study found that there were differences among sub-world affiliates in terms of specialization level, motives, conflicts, constraints, and setting preferences.

Many leisure researchers have examined the recreation specialization construct with the belief that recreationists progress along a specialization continuum, from low to high, the longer they participate in an activity. Building on other researchers' conclusions that recreationists do not necessarily progress over time, this study sought to better understand whether people truly desire to progress. Competition, sociability, and skill development variables were proposed as measures that would more accurately describe an intermediate career trajectory of specialization. This intermediate career trajectory of specialization was called flatlining, because recreationists progress to their desired level of specialization and then maintain a flat, or non-progressing, style of involvement on the specialization continuum. Behavior, skill and knowledge, and commitment variables were also used to measure recreation specialization. A three-level self-classification measure was used to predict group membership, and this classification was used to evaluate both groups of variables. The behavior, skill and knowledge, and commitment variables did a very good job of predicting level of specialization. The competition, sociability, and skill development variables did a good job of predicting the high and low levels of specialization, but did a very poor job of predicting the flatlining level of specialization. Motivations to participate were also studied. This study's failure to accurately predict the flatlining career trajectory highlights the need for further research on the phenomenon.

Rock climbing participation is growing throughout the United States. Information on the participation patterns and preferences of groups of climbers can be used to help mangers make better informed decisions, allowing them to cater to the specific interests of climbing participants, ensure participant satisfaction and encourage continued patronage. This study explores variation in participant characteristics across segments of the climbing population. Because an individual's level of specialization will align him with other like-minded participants, an understanding of a participant's stages of involvement and level of specialization assists in understanding the social world's views and behaviors toward the resource and toward other participants. Information on participants' level of experience, level of commitment, and demographic dimensions can be used to better understand and manage climbers. This study aimed to identify differences among groups of climbers. The study measured across 484 participants. The participants were described by various dependent variables, which included demographic factors, level of specialization, motivations for climbing, types of conflicts and constraints experiences, and setting preferences. Measuring the climbers' participation patterns identified participant sub-world groups. The four groups of climbing participants, as identified by this study, were: infrequent climbers, frequent outdoor climbers, frequent indoor climbers, and avid climbers. While demographics are not significantly descriptive of climbing sub-world affiliations, this study found that there were differences among sub-world affiliates in terms of specialization level, motives, conflicts, constraints, and setting preferences.

With ever-increasing demands on scarce natural resources, understanding public attitudes toward natural resources is crucial to accomplishing various management goals for resource conservation and the provision of resource services. Despite numerous studies of public attitudes toward resource conservation since Dunlap and Heffernan 1975), there is a limited understanding of the driving forces underlying recreationists?? activities that contribute to their conservation attitudes and behaviors. Thus, this dissertation investigated the connected causal effects of how recreational anglers develop their conservation attitudes and preferences toward natural resources in light of within- and between-group diversity. Three independent studies, focusing on both recreation specialization and recreationists?? conservation attitudes, were conducted with different research themes. Two different methods, namely, a stated preference discrete choice method and structural equation modeling, were used. The first study examined anglers?? holistic preferences for trade-offs of various management rules and regulations using specialization segmentation. Study results supported that high specialization anglers reported a greater appreciation of and support for resource management practices such as harvest regulations that seek to reduce adverse user impacts than their less specialized counterparts. The second study explored the fostering process of conservation attitudes and behaviors with recreation specialization and other motivational and attitudinal variables. Given that empirical analyses supported the theoretical propositions in the constructed model, recreation specialization and other accrued motivational and attitudinal concepts provided insight to understanding the formation pattern of conservation attitudes and behaviors. The third study examined how the fostering process of attitudes toward resource conservation differed by race and ethnicity. Results indicated that anglers, regardless of their racial and ethnic origins, showed similar patterns of fostering attitudes toward and preferences for resource conservation. As they participated in fishing activity on a regular basis, heterogeneous development in conservation attitudes and preferences were likely to be minimal and be better explained by the framework of recreation specialization. Finally, a summary and synthesis of the findings, agenda for future research, and the management implications were discussed.

The dissertation examines IPO underpricing and long-term performance to assess the use of industry specialization as a differentiation strategy by audit firms and underwriters. Prior studies indicate that prestigious auditors or underwriters (e.g., Big 6 auditors) are associated with IPO underpricing. I extend existing literature by incorporating market share as a refined measure of auditor (underwriter) reputation. In particular, I define a differentiated auditor (underwriter) as the market leader that possesses significantly higher market share than their competitors in the client industry. I hypothesize that the impact of auditor (underwriter) reputation in the IPO setting depends on whether the audit firm (underwriter) has successfully differentiated itself from competitors within client industries. My results show that as audit firm (underwriter) industry market share increases without differentiation, the IPO underpricing increases. It appears that this group of auditors (underwriters) intentionally engages in high-risk IPOs in order to gain fee advantages. In contrast, differentiated auditors (underwriters) are related to lower IPO underpricing because their reputation assist in reducing information asymmetry between issuers and investors. My study is important because it shows that the benefits previously thought to be attributable to a very large set of auditors and underwriters stems primary