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  • Astronomy  (1)
  • JEL classification: J12  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of population economics 11 (1998), S. 205-222 
    ISSN: 1432-1475
    Keywords: JEL classification: J12 ; I20 ; I30 ; Key words: Family structure ; education ; income
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology , Economics
    Notes: Abstract. This study examines the effect of family structure on high school graduation by race and gender using data from the first twenty-one waves of the Panel Study of Income Dynamics and recently available retrospective marital histories. The nature of the data allows for a more complete specification of family structure than has been heretofore possible. The analysis tests the hypothesis that the negative effect on educational attainment often associated with living in a mother-only or stepfather family stems primarily from the reduced level of economic resources available to these households. Empirical findings indicate that living with a widowed, divorced, or separated mother has little or no effect on educational attainment once we control for economic status. However, living in a stepfather family appears to have a persistent negative effect on high school graduation rates.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2019-07-13
    Description: Ultraviolet spectra of the Seyfert 1 galaxy NGC 5548 were obtained with the Faint Object Spectrograph (FOS) on the Hubble Space Telescope on 1992 July 5, when the UV continuum and broad emission lines were at their lowest ever observed level. The high resolution of the spectra, relative to previous UV observations, and the low state of NGC 5548 allow the detection and accurate measurement of strong narrow components of the emission lines of Ly alpha, C IV 1549, and C III 1909. Isolation of the UV narrow components enables a detailed comparison of narrow-line region (NLR) properties in Seyfert 1 and 2 galaxies, and removal of their contribution is important for studies of the broad-line region (BLR). Relative to the other narrow lines, C IV 1549 is much stronger in NGC 5548 than in Seyfert 2 galaxies, and Mg II 2798 is very weak or absent.
    Keywords: Astronomy
    Type: NASA-CR-202592 , NAS 1.26:202592 , The Astrophysical Journal; 416; L67-L70
    Format: text
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