Sökning: "Sandra Black"

Hittade 2 avhandlingar innehållade orden Sandra Black.

  1. 1. Education and the Family : Essays in Empirical Labour Economics

    Författare :Helena Holmlund; Anders Björklund; Sandra Black; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; economics of education; family economics; Economics; Nationalekonomi;

    Sammanfattning : Estimating Long-Term Consequences of Teenage Childbearing: An Examination of the Siblings Approach In the study of the consequences of teenage motherhood, the siblings approach has been proposed as a strategy to control for unobserved family background. Revisiting this literature, my contribution in adopting the siblings approach lies in controlling for heterogeneity within the family by using pre-motherhood school performance, a characteristic that differs across sisters. LÄS MER

  3. 2. Optical investigations and characterization of soot of different morphology and maturity

    Författare :Sandra Török; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser-induced incandescence; Extinction; Elastic light scattering; mini-CAST; Soot; Brown carbon; Black carbon; Maturity; Morphology; Fysicumarkivet A:2021:Török;

    Sammanfattning : The formation path from small poorly absorbing incipient soot to larger fractal-like strongly absorbing black soot is extensive, and along this path the optical and physicochemical properties of the soot evolve. Soot emitted into the atmosphere may originate from some stage of this process, which will result in a wide spectrum of carbonaceous aerosols in the atmosphere which may interact with the sun and influence the radiative balance of the earth. LÄS MER