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variable |
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Variable An element in a model. For example, in the model RS&Pt+1 = a + b Tbill t + et, where RS&Pt+1 is the return on the S&P in month t+1 and Tbill is the Tbill return at month t, both RS&P and Tbill are "variables" because they change through time; i.e., they are not constant.
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The control variables in the regressions generally performed as expected in sign, although they were not always statistically significant. Students completed questionnaires measuring i) their use of computer games, television, music and books as sleep aids; ii) their average weekday and weekend bedtimes; iii) their levels of tiredness; iv) whether they had a television or computer game console in their bedroom; and v) several demographic control variables. As mentioned, in order to examine how assets and human capital development are related to the economic mobility of single mothers, three regression analyses were conducted for the poor, middle-income, and high-income single mothers, with economic mobility regressed on control variables and then on assets and human capital development variables. |
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