Total price and income elasticity
| Low-income households | Middle-income households | High-income households | All households | |||||
| Price | −1.019*** | (0.084) | −0.921*** | (0.094) | −0.602*** | (0.148) | −0.880*** | (0.054) |
| Income | 0.502*** | (0.101) | 0.496*** | (0.144) | 0.572*** | (0.084) | 0.530*** | (0.042) |
| H0: No difference between income groups price elasticities | ||||||||
| LI and MI | χ2(1)=1.53; prob>χ2=0.2168 | |||||||
| MI and HI | χ2(1)=10.27; prob>χ2=0.0014 | |||||||
| LI and HI | χ2(1)=16.46; prob>χ2=0.0000 | |||||||
| H0: No difference between income groups income elasticities | ||||||||
| LI and MI | χ2(1)=0.19; prob>χ2=0.6653 | |||||||
| MI and HI | χ2(1)=0.19; prob>χ2=0.6667 | |||||||
| LI and HI | χ2(1)=1.37; prob>χ2=0.2423 | |||||||
LI, MI and HI stand for low-income, middle-income and high-income households, respectively. SEs of price and income elasticities were estimated using a bootstrap of 1000 replications.
Source: Own calculation; ***p<0.01, **p<0.05, *p<0.1.