Results 251 to 260 of about 64,068 (309)

School Climate and Sleep Duration Among Adolescents at the Intersection of Multiple Social Positions

open access: yesJournal of Adolescence, EarlyView.
ABSTRACT Introduction Recent studies have indicated that sleep is fundamental for adolescents' physical and mental health. Although it is known that context influences sleep, the impact of school climate on sleep duration remains understudied. Methods Using a large, diverse, population‐based sample of adolescents attending California high schools (N ...
André Gonzales Real   +6 more
wiley   +1 more source

Forecasting Natural Gas Prices in Real Time

open access: yesJournal of Applied Econometrics, EarlyView.
ABSTRACT This paper provides a comprehensive analysis of the forecastability of the real price of natural gas in the United States at the monthly frequency considering a universe of models that differ in complexity and economic content. We find that considerable reductions in mean‐squared prediction error relative to a no‐change benchmark can be ...
Christiane Baumeister   +3 more
wiley   +1 more source

Recursive and Cyclic Constructions for Double‐Change Covering Designs

open access: yesJournal of Combinatorial Designs, EarlyView.
ABSTRACT A double‐change covering design (DCCD) is a v $v$‐set V $V$ and an ordered list L ${\mathscr{L}}$ of b $b$ blocks of size k $k$ where every pair from V $V$ must occur in at least one block and each pair of consecutive blocks differs by exactly two elements. It is minimal if it has the fewest blocks possible and circular when the first and last
Amanda Lynn Chafee, Brett Stevens
wiley   +1 more source

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