Table 3.
Food price variance decomposition by geographic area before and after adjusting for region, urbanicity, and toilet paper price
| Healthy-to-unhealthy price ratio variance (SE) | Healthy food price variance (SE) | Unhealthy food price variance (SE) | |
|---|---|---|---|
| Empty model | |||
| Between states | 0.0146 (0.0054) | 0.0006 (0.0002) | 0.0002 (0.0001) |
| Between counties (in states) | 0.0047 (0.0008) | 0.0003 (0.0001) | 0.0002 (0.0000) |
| Within counties | 0.0118 (0.0004) | 0.0010 (0.0000) | 0.0002 (0.0000) |
| ICC (state level) | 47.0% | 31.5% | 38.1% |
| ICC (county level) | 15.1% | 16.8% | 28.7% |
| Residual | 37.9% | 51.6% | 33.2% |
| Control for region, urbanicity, and toilet paper price | |||
| Between states | 0.01 (0.0042) | 0.0001 (0.0001) | 0.0002 (0.0001) |
| Between counties (in states) | 0.0048 (0.0008) | 0.0002 (0.0000) | 0.0001 (0.0000) |
| Within counties | 0.0118 (0.0004) | 0.0008 (0.0000) | 0.0001 (0.0000) |
| ICC (state level) | 37.6% | 9.7% | 43.8% |
| ICC (county level) | 18.1% | 15.9% | 17.2% |
| Residual | 44.3% | 74.4% | 39.0% |
CI confidence interval, ICC intraclass correlation, the proportion of variation in price that is accounted for by differences at the state and county levels, SE standard error