21,524 research outputs found
Poverty, children's health, and health care utilization
This paper was presented at the conference "Unequal incomes, unequal outcomes? Economic inequality and measures of well-being" as part of session 1, "Health status of children and households in poverty." The conference was held at the Federal Reserve Bank of New York on May 7, 1999. This paper discusses health as a direct measure of economic well-being and draws attention to those suffering the worst outcomes and the link between poverty and health. According to the author, in 1994 only 10 percent of children under age five in families making 10,000 were in less than very good health. Moreover, in recent years the number of poor children whose health is fair or poor has increased relative to the number of nonpoor children in these same health categories. In 1987, for every nonpoor child with health problems, there were close to two children in poverty in poor health; by 1996, that ratio had risen to 2.7.Poverty ; Income ; Medical care
Child Mental Health and Human Capital Accumulation: The Case of ADHD Revisited
Recently, Currie and Stabile (2006) made a significant contribution to our understanding of the influence of ADHD symptoms on a variety of school outcomes including participation in special education, grade repetition and test scores. Their contributions include using a broad sample of children and estimating sibling fixed effects models to control for unobserved family effects. In this paper we look at a sample of older children and confirm and extend many of the JCMS findings in terms of a broader set of measures of human capital and additional specifications.
Education and Labor Market Consequences of Teenage Childbearing: Evidence Using the Timing of Pregnancy Outcomes and Community Fixed Effects
The question of whether giving birth as a teenager has negative economic consequences for the mother remains controversial despite substantial research. In this paper, we build upon existing literature, especially the literature that uses the experience of teenagers who had a miscarriage as the appropriate comparison group. We show that miscarriages are not random events, but rather are likely correlated with (unobserved) community-level factors, casting some doubt on previous findings. Including community-level fixed effects in our specifications lead to important changes in our estimates. By making use of information on the timing of miscarriages as well as birth control choices preceding the teenage pregnancies we construct more relevant control groups for teenage mothers. We find evidence that teenage childbearing likely reduces the probability of receiving a high school diploma by 5 to 10 percentage points, reduces annual income as a young adult by 2,400, and may increase the probability of receiving cash assistance and decrease years of schooling.teen pregnancy, economic consequences, human capital
Thermoset-thermoplastic aromatic polyamide containing N-propargyl groups
The compounds of the class of aromatic polyamides useful as matrix resins in the manufacture of composites or laminate fabrication were developed. The process for preparing this thermoplastic-thermoset polyamide system involves incorporating a latent crosslinking moiety along the backbone of the polyamide to improve the temperature range of fabrication thereof wherein the resin softens at a relatively low temperature (approx. 154 C) and subsequently sets-up or undergoes crosslinking when subjected to higher temperature (approx. 280 C)
Advanced space system concepts and their orbital support needs (1980 - 2000). Volume 1: Executive summary
The likely system concepts which might be representative of NASA and DoD space programs in the 1980-2000 time period were studied along with the programs' likely needs for major space transportation vehicles, orbital support vehicles, and technology developments which could be shared by the military and civilian space establishments in that time period. Such needs could then be used by NASA as an input in determining the nature of its long-range development plan. The approach used was to develop a list of possible space system concepts (initiatives) in parallel with a list of needs based on consideration of the likely environments and goals of the future. The two lists thus obtained represented what could be done, regardless of need; and what should be done, regardless of capability, respectively. A set of development program plans for space application concepts was then assembled, matching needs against capabilities, and the requirements of the space concepts for support vehicles, transportation, and technology were extracted. The process was pursued in parallel for likely military and civilian programs, and the common support needs thus identified
Consumer Willingness to Pay for Irradiated Poultry Products
A probit model for whether or not consumers would buy irradiated poultry products is estimated jointly with an OLS equation for the price premiums that consumers are willing to pay for irradiated chicken breast meat. The results suggest that educating consumers about irradiation would be beneficial to the food industry.Consumer/Household Economics,
Consumer Attitudes, Knowledge, Experiences, and Socio-Demographic Characteristics on Willingness to Pay for Irradiated Pork
Consumer/Household Economics,
SETI science working group report
This report covers the initial activities and deliberations of a continuing working group asked to assist the SETI Program Office at NASA. Seven chapters present the group's consensus on objectives, strategies, and plans for instrumental R&D and for a microwave search for extraterrestrial in intelligence (SETI) projected for the end of this decade. Thirteen appendixes reflect the views of their individual authors. Included are discussions of the 8-million-channel spectrum analyzer architecture and the proof-of-concept device under development; signal detection, recognition, and identification on-line in the presence of noise and radio interference; the 1-10 GHz sky survey and the 1-3 GHz targeted search envisaged; and the mutual interests of SETI and radio astronomy. The report ends with a selective, annotated SETI reading list of pro and contra SETI publications
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