These tests are expressed in hypotheses 1-6 below and will be assessed using the t-statistic corresponding to each estimated parameter. Second, the data will be used to assess whether the causal relationships hypothesized not to exist are statistically insignificant. These tests are expressed in hypotheses 6 and 7 below. Hierarchical regression and associated F-tests of the significance of the increase in R2 due to the additional variables will be used for these hypotheses.