AIDing Contraception: HIV and Recent Trends in Abortion Rates

Since the onset of HIV/AIDS awareness in the early 1980s, much attention has centered around the substantial negative effects of the disease throughout the world. This paper provides evidence of a secondary effect the disease has had on sexual behavior in the United States. Using a difference-in-differences estimation framework and state level data, we show that the perceived threat of HIV resulted in a drop in unwanted pregnancies, as demonstrated by a lower incidence of abortions. Our results suggest that each additional reported case of HIV per 1,000 individuals resulted in 85.5 fewer abortions per 1,000 live births.HIV, abortion, fertility

Silence is Golden: Railroad Noise Pollution and Property Values

This paper uses a unique dataset containing property values and manually collected noise measurements in Memphis, Tennessee to estimate the impact of train noise pollution on commercial and residential property values. Results show that a residential property exposed to 65 decibels or greater of railroad noise results in a 14 to 18 percent decrease in property value. Once a 65 decibel measure is included, there is no additional impact on price of distance to the closest railroad crossing. For commercial property, neither crossing proximity nor noise level significantly affect property value. The results provide evidence of a negative externality that is created by railroad noise for households and the need for more exact measures of noise levels. The findings are also consistent with previous literature suggesting firms have different ideas than individuals about desirable locational attributes

Age-related oculopathies in a nutshell (patient education materials)

Effective doctor-to-patient communication is an essential component of health care which is difficult due to the complicated nature of ocular anomalies. Glaucoma and age-related macular degeneration (AMD) are two very common causes of decreased vision among adults older than 55 years. This thesis outlines the steps in composition and printing of patient-education brochures which can be used to supplement the practitioner\u27s description of the diseases. The brochures contain concise, descriptive statements combined with simple illustrations and are printed with large easy-to-read print, in both English and Spanish. They explain the nature, pathogenesis, treatment, and prognosis of Glaucoma and AM D

Review of geographical stocks of tropical dolphins (Stenella spp. and Delphinus delphis) in the eastern Pacific

Information on geographical variation is reviewed for Stenella attenuata, S. longirostris, S. coeruleoalba, and Delphinus delphis in the eastern tropical Pacific, and boundaries for potential management units are proposed. National Marine Fisheries Service and Inter-American Tropical Tuna Commission sighting records made from 1979 to 1983 which were outside boundaries used in a 1979 assessment were examined for validity. Tagging returns and morphological data were also analyzed. Several stock ranges are expanded or combined. Three management units are proposed for S. attenuata: the coastal, northern offshore, and southern offshore spoiled dolphins. Four management units are proposed for S. longirostris: the Costa Rican, eastern, northern whitebelly, and southern whitebelly spinner dolphins. Two provisional management units are proposed for S. coeruleoalba: the northern and southern striped dolphins. Five management units (two of which are provisional) are proposed for D. delphis: the Baja neritic, northern, central, southern, and Guerrero common dolphins. Division into management units was based on morphological stock differences and distributional breaks. (PDF file contains 34 pages.

Manufacturing processes

The following issues are covered: process development frequently lags behind material development, high fabrication costs, flex joints (bellows) - a continuing program, SRM fabrication-induced defects, and in-space assembly will require simplified design

Game, set, and match: Do women and men perform differently in competitive situations?

This paper analyzes potential gender differences in competitive environments using a sample of over 100,000 professional tennis matches. Focusing on two phenomena of the labor and sports economics literature, we find robust evidence for (i) the hot-hand effect (an additional win in the most recent ten matches raises the likelihood of winning by 3.1 to 3.3 percent) and (ii) the clutch-player effect, as top players are excelling in Grand Slam tournaments, the most important events. Overall, we find virtually no gender differences for the hot-hand effect and only minor distinctions for the clutch-player effect

Good girl, bad boy: Corrupt behavior in professional tennis

This paper identifies matches on the male and female professional tennis tours in which one player faces a high payoff from being “on the bubble” of direct entry into one of the lucrative Grand Slam tournaments, while their opposition does not. Analyzing over 378,000 matches provides strong evidence for corrupt behavior on the men’s tour, as bubble players are substantially more likely to beat better ranked opponents when a win is desperately needed. However, we find no such evidence on the women’s tour. These results prevail throughout a series of extensions and robustness checks, highlighting gender differences regarding corrupt and unethical behavior, but also concerning collusion. We especially find evidence for collusion once monetary incentives are further increased. Finally, the market for sports betting does not seem to be aware of this phenomenon, suggesting a market imperfection and further confirming our suspicion of irregular activities in men’s tennis

Gender in Jeopardy!: The Role of Opponent Gender in High-Stakes Competition

Using 4,279 episodes of the popular US game show Jeopardy!, we analyze whether the opponents\u27 gender is able to explain the gender gap in competitive behavior. Our findings indicate that gender differences disappear when women compete against men. This result is surprising, but emerges with remarkable consistency for the probability to (i) respond, (ii) respond correctly, and (iii) respond correctly in high-stakes situations. Even risk preferences in wagering decisions, where gender differences are especially pronounced, do not differ across gender once a woman competes against males. Using a fixed-effects framework, and therefore exploiting within-player variation only, confirms these findings. These results, derived from a large real-life setting, suggest that gender differences in performance and risk attitudes are not gender-inherent, but rather emerge in distinct social environments