From: Consumer response to media information: the case of grapefruit-medicine interaction
Outcome equation (Y21)) | Selection equation (Y12)) | |||
---|---|---|---|---|
Estimated parameters | Standard error | Estimated parameters | Standard error | |
Thresholds 1 | 0.059 | (1.348) | −2.550b | (0.242) |
Thresholds 2 | 3.229b | (1.059) | - | |
Age | 0.020a | (0.011) | 0.013b | (0.004) |
Gender | 0.103 | (0.125) | −0.029 | (0.056) |
Income | −0.046 | (0.059) | 0.012 | (0.026) |
Education | 0.174 | (0.124) | 0.117b | (0.056) |
Yes warning | 1.505b | (0.566) | 0.798b | (0.314) |
No warning | 0.273 | (0.396) | 0.208 | (0.186) |
Occasionally consumed | 1.646b | (0.539) | 0.780b | (0.214) |
Frequently consumed | 2.150b | (0.669) | 1.754b | (0.24) |
Trust | - | 0.012 | (0.066) | |
Influence | - | 0.173b | (0.067) | |
Search | - | 0.257b | (0.063) | |
Positive tone | 0.845b | (0.177) | - | |
Negative tone | −0.277a | (0.167) | - | |
Positive frequency | 0.050 | (0.038) | - | |
Negative frequency | −0.038 | (0.038) | - | |
Old news | −0.398b | (0.165) | - | |
New news | −0.505b | (0.181) | - | |
Age*Yes warning | −0.037b | (0.011) | −0.006 | (0.006) |
Age*No warning | −0.007 | (0.009) | −0.003 | (0.004) |
Age*Occasionally consumed | −0.035b | (0.010) | −0.011b | (0.004) |
Age*Frequently consumed | −0.030b | (0.011) | −0.022b | (0.005) |
ρ | 0.278 | (0.457) | ||
LR test (H o : ρ = 0), χ 2 (1) | 270.99b | |||
Observations | 3497 | |||
Log Likelihood | −1700.55 | |||
Wald test, χ 2 (18) | 169.51 | |||
Estimated probabilities | Mean | Min | Max | |
p(y1 = 1) | 0.157 | 0.016 | 0.654 | |
p(y1 = 1, y2 = 0) | 0.011 | 0.000 | 0.247 | |
p(y1 = 1, y2 = 1) | 0.127 | 0.134 | 0.455 | |
p(y1 = 1, y2 = 2) | 0.019 | 0.000 | 0.496 |