Matching Contributions and the Voluntary Provision of a Pure Public Good: Experimental Evidence

Laboratory experiments are used to study the voluntary provision of a pure public good in the presence of an anonymous external donor. The external funds are used in two different settings, lump-sum matching and one-to-one matching, to examine how allocations to the public good are affected. The experimental results reveal that allocations to the public good under lumpsum matching are significantly higher, and have significantly lower within-group dispersion, relative to one-to-one matching and a baseline setting without external matching funds.public goods, free riding, laboratory experiments

Comparing Small-Group and Individual Behavior in Lottery-Choice Experiments

Lottery-choice experiments are conducted to compare risk preferences revealed by three-person groups versus isolated individuals. A lottery-choice experiment consists of a menu of paired lottery choices structured so that the crossover point from a low-risk to a high-risk lottery can be used to infer the degree of risk aversion. A between-subjects experiment of group versus individual lottery-choice decisions reveal that there is not a significant difference in the average crossover point, but lottery choices are affected by a significant interaction between subject composition (individual or group) and lottery winning percentage. Also, a three-phased individual-group-individual sequenced experiment reveals that the count of safe lotteries chosen by groups is, on average, significantly greater than the mean of the individual members. Finally, making a phase-two group decision has a significant impact on subsequent phase-three individual decisions relative to the initial phase-one (individual) decisions.lab experiments, risk preferences, group decisions

Comparing Small-Group and Individual Behavior in Lottery-Choice Experiments

Lottery-choice experiments are conducted to compare risk preferences revealed by three-person groups versus isolated individuals. A lottery-choice experiment consists of a menu of paired lottery choices structured so that the crossover point from a low-risk to a high-risk lottery can be used to infer the degree of risk aversion. A between-subjects experiment of group versus individual lottery-choice decisions reveal that there is not a significant difference in the average crossover point, but lottery choices are affected by a significant interaction between subject composition (individual or group) and lottery winning percentage. Also, a three-phased individual-group-individual sequenced experiment reveals that the count of safe lotteries chosen by groups is, on average, significantly greater than the mean of the individual members. Finally, making a phase-two group decision has a significant impact on subsequent phase-three individual decisions relative to the initial phase-one (individual) decisions.lab experiments, risk preferences, group decisions

Rationalizing the E-Rate: The Effects of Subsidizing IT in Education

Starting in 1998, the E-Rate program has provided $2.25 billion to subsidize Internet access in schools and libraries serving low income populations in the US. I analyze the effect of E-Rate subsidies on educational outcomes for Texas high schools over the 1994-2003 time period. Consistent with previous economic analyses, I find few, if any, improvements in student achievements. I do find evidence that experienced teachers are reallocated within districts toward schools receiving E-Rate grants. I also find evidence that the pool of college entrance exam takers is affected by E-Rate grants such that relying on average scores could lead to incorrect conclusions

Video Games and Violent Crime

Psychology studies of the effects of playing video games have found emotional responses and physical reactions associated with reinforced violent and anti-social attitudes. It is not clear, however, whether these markers are associated with increases in one's preferences for anti-social behaviors or whether virtual behaviors act to partially sate one's desire for actual antisocial behaviors. Violent or criminal behaviors in the virtual world and in the physical world could plausibly be either complements or substitutes. A finding of one versus the other would have diametrically opposing policy implications. I study the incidence of criminal activity as related to a proxy for increased gaming, the number of game stores, from a panel of US counties from 1994 to 2004. With fixed county and year effects, I can examine if changes relative increases in gaming in an area are associated with relative increases or decreases in criminal activity. For six of eight categories of crime, more game stores are associated with significant declines in crime rates. Proxies for other leisure activities, sports and movie viewing, do not have a similar effect. For confirmation, I also find that mortality rates, especially mortality rates stemming from injuries, also are negatively related to the number of game stores

The Impacts of Shopbots on Online Consumer Search

Online price comparison agents (shopbots) allow consumers to instantaneously receive price and other information from many online retailers. Online consumer clickstream data from ComScore Inc. demonstrate that consumers are increasingly using shopbots to conduct search. This phenomenon raises such questions as "how do shopbots change consumers' search behavior?" and "do they reduce consumers' online search?" Conventional wisdom suggests that consumers are expected to search less because shopbots have displayed prices and other relative information from retailers on the search result page(s). Surprisingly, this study demonstrates the opposite result. That is, consumers are actually visiting more online retailer web sites after using shopbots. This finding suggests that after searching for an item through a shopbot and receiving the price information, consumers will continue to look for detailed information about the online retailers by visiting their web sites. The empirical finding is explained by an analytical model, which shows that on the one hand shopbots reduce the marginal benefit of searching additional online stores; on the other hand they reduce the cost of search. Therefore whether shopbots reduce consumer search depends on the cost of reducing per unit of risk, which is decided by a number of factors, such as marginal search costs, price dispersion and quality differentiation among stores, price and quality correlation, and consumers' relative preference for service quality. The model also gives sufficient and necessary conditions under which shopbots increase consumer surplus

Morphologic study of the pineal gland of the dog

Após a descoberta da melatonina por Lerner et al. (1958), novas pesquisas e perspectivas surgiram tornando a pineal uma estrutura mais estudada. Além disso, sabe-se que este hormônio está relacionado com o controle circadiano e outras funções comportamentais fisiológicas como o ciclo reprodutivo e termorregulação. Neste trabalho, foram utilizados 20 cães e estudamos a morfologia das glândulas, empregando uma análise macroscópica e microscópica. O formato das pineais variou de cônico a glossóide (em relação à língua humana); cor entre bege e marrom-acinzentado e apresentaram consistência gelatinosa. A largura e o comprimento das glândulas variaram respectivamente de 1,38 a 2,39 mm e de 1,53 a 2,96 mm. Quanto à microscopia, utilizamos coloração de eosina-hematoxilina (HE), e em todas as pineais observamos a presença dos seguintes componentes: cápsula; septos ou trabéculas pinealócitos; células da glia; grânulos de pigmentos, e não foram notadas concreções calcáreasFollowing the discovery of the melatonin by Lerner et al. (1958), new research and perspectives were developed in order to improve the knowledge regarding the pineal gland. This hormone is not only related to the circadian control but also influences other behavioral functions such as the reproductive cycle and thermoregulation. In this study the morphology of the pineal gland (epiphysis cerebri) from 20 dogs were analyzed by means of macroscopic and microscopic evaluation. The shape of the gland ranged from conic to tongue-like shape (in relation to human tongue). The gland color ranged from beige to gray-brownish and it had a gelatinous consistency. The width and length of the glands ranged from 1.38 to 2.39 mm and 1.53 to 2.96 mm, respectively. Capsule, septa, pinealocytes, glial cells and pigment granules were microscopically found in all glands. No calcareous concretions were observe

Fifteen Years of Future Farmers of America Progress in South Dakota 1929-1944

The origin of the Future Farmers of America in South Dakota did not occur by chance. Instead, it grew from the desires and needs of farm and ranch boys enrolled in vocational agriculture in South Dakota high schools. Numerous vocational agriculture departments in the state had agriculture clubs preceding the organization of the F.F.A. in South Dakota. Many of them were planning and carrying to completion various activities now common to the F.F.A. in this state. However, these clubs lacked a coordinating agency such as a state association operated by and for representatives from their own group. W.P. Beard, state supervisor of agricultural education and teachers of vocational agriculture, as well as others identified with vocational agriculture in South Dakota high schools, saw this need and furnished the guidance and instruction necessary to organize and activate the South Dakota Association. It is the purpose of this study to assemble and present to the reader pertinent facts in authentic form, appertaining to the development of Future Farmers of America in South Dakota. This investigation covers the first fifteen years of the life of the association plus a brief account of the early beginnings of agricultural student groups prior to the time of the development of F.F.A. in other states and consequently the origin and growth of the future farmer movement in the nation

Development of sustainability within a university curriculum

There are currently many complex issues facing human society. There are a range of well-documented environmental problems that stem from past and current methods of human development. Declining ecosystems and species extinctions aside, many humans suffer and struggle within this mounting tide of environmental hardships as well as continuing struggles with access to education and equality within society. A large portion of these struggles arise from the disparity in wealth and the seemingly oppressive nature of economic systems for the 'have-nots' of the world. This quick overview of environmental, social, and economic conditions shows the interdependencies of the three aspects of sustainability or sustainable development. As there are calls to action from the scientific community, government, and society to address these issues of sustainable development, there are a number of voices calling for general changes within the various levels of the education system and more specifically with connecting students to the subject of sustainability. This thesis makes the argument that the most effective step in addressing both these issues is an introductory course on sustainability. Although the issues of sustainability and education are framed under different context, they both can be reduced to the concept of more holistic thinkers in society and in the classroom. A review of more discipline-specific courses incorporating sustainability, faculty surveys, and alternative learning and teaching methods strengthened the course design process. The end result is an upper level undergraduate course that uses the topics of food, water, and energy to bring a new level of understanding to the student on sustainability and holistic thinking.M.S.Committee Chair: Meyer, Michael; Committee Member: Amekudzi, Adjo; Committee Member: Bergin, Michae