Table 4.
Independent variables | Dependent variables | |||||||
---|---|---|---|---|---|---|---|---|
Number of days | Total time | Meet recommended level | No. of days (vigorous activity) | |||||
Coef.a | ME (Elas’ty)b | Coef.a | ME (Elas’ty)b | Coef.a | ME (Elas’ty)b | Coef.a | ME (Elas’ty)b | |
Unit price | ||||||||
‘Fixed’ price | 0.00 | 0.04 (0.09) | 0.01** | 0.01 (0.30) | 0.03** | 0.01 (1.05) | 0.01** | 0.07 (0.20) |
‘Variable’ price | −0.13*** | −1.14 (−0.24) | −0.05 | −0.05 (−0.09) | −0.02 | −0.00 (−0.04) | −0.00 | −0.03 (−0.01) |
Time price (travel time) | −0.02*** | −0.21 (−0.47) | −0.03*** | −0.03 (−0.64) | −0.07** | −0.02 (−2.15) | −0.02** | −0.13 (−0.36) |
Perceived benefits | ||||||||
To relax, forget about your cares | 0.44** | 3.41 | 0.40 | 0.40 | 0.83 | 0.18 | 0.15 | 1.02 |
To feel a sense of achievement | −0.48 | −5.29 | −0.19 | −0.19 | −0.71 | −7.05 | ||
To learn new things | −0.11 | −0.98 | 0.13 | 0.13 | ||||
To control or lose weight | −0.64 | −0.90 | 0.35 | 2.27 | ||||
To look good | 1.40** | 6.71 | ||||||
Control variables | ||||||||
Personal income (high) | 0.30* | 2.76 | 0.19 | 0.19 | 0.77 | 0.19 | 0.03 | 0.20 |
Age | −0.06*** | −0.54 (−1.60) | ||||||
Gender (male) | 0.69** | 0.69 | 0.65** | 4.33 | ||||
No. of observations | 47 | 47 | 47 | 47 | ||||
Constant | 3.75 | 5.71 | −2.02 | 1.55 | ||||
Linktest | p = 0.20 | p = 0.95 | p = 0.36 | p = 0.39 | ||||
Goodness of fit | p = 0.66d | |||||||
Test for heteroskedasticity | p = 0.44c | |||||||
Normality test | p = 0.43 | |||||||
Adjusted R squared | 0.38 | |||||||
Pseudo R squared | 0.18 | 0.41 | 0.14 | |||||
Akaike inform. criterion (AIC) | 284.63 | 154.50 | 69.80 | 321.11 | ||||
Bayesian inform. criterion (BIC) | 310.53 | 132.30 | 53.15 | 293.36 |
aSignificance level of 1% (***), 5% (**), 10% (*)
bMarginal effects (Elasticity calculated for only continuous variables)
cChi-square (1) = 0.58
dChi-square (8) = 5.90. Average variance inflation factors (VIF) for the independent variables were 1.5, and average tolerance levels were 0.7