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This book contains three studies. The first study
addresses whether neighborhood influences on
adolescent substance use are mediated through
parental and peer characteristics. The second study
compares differences in neighborhood mechanisms on
adolescent substance use between census tracts and
block groups. The third study examines whether
parenting effects on adolescent substance use vary by
neighborhood type. The sample includes 924
adolescents 12 to 14 years of age whose addresses
were matched with 1990 census tracts and census block
groups. The findings are as follows: (1)...

The aim of this article is to give a complete account of the Eichler-Brandt theory over function fields and the basis problem for Drinfeld type automorphic forms. Given arbitrary function field $k$ together with a fixed place $infty$, the authors construct a family of theta series from the norm forms of ``definite'' quaternion algebras, and establish an explicit Hecke-module homomorphism from the Picard group of an associated definite Shimura curve to a space of Drinfeld type automorphic forms. The ``compatibility'' of these homomorphisms with different square-free levels is also examined....