Table 2.
Calories from Soft Drinks: Ages 18–90
Linear | Quadratic | Cubic | Quartic | |
---|---|---|---|---|
|
||||
Soft Drink Tax Rate | 1.566 (2.447) | 0.569 (5.866) | −6.717 (11.575) | −2.377 (15.066) |
Soft Drink Tax Rate^2 | 0.102 (0.408) | 2.347 (2.788) | −0.293 (8.448) | |
Soft Drink Tax Rate^3 | −0.149 (0.171) | 0.290 (1.420) | ||
Soft Drink Tax Rate^4 | −0.022 (0.071) | |||
Observations | 35940 | 35940 | 35940 | 35940 |
F Statistic | 0.410 | 0.062 | 0.399 | 0.275 |
P-Value | 0.526 | 0.804 | 0.674 | 0.843 |
BIC | 484050.8 | 484061.2 | 484070.6 | 484081.1 |
Notes: Each column represents a separate regression. Heteroskedasticity-robust standard errors that allow for clustering within states are in parentheses. The F statistic and corresponding p-value are based on the null hypothesis that the coefficient for the soft drink tax rate and all higher order polynomial terms are jointly equal to zero. Additional variables include female, age, age squared, black, other race, whether the food diary is from a weekday, state, year, and quarter. All regressions utilize NHANES survey weights.
Source: NHANES 1989 – 2006