Table 4A. Income, Box–Cox transformation of income, and predicted probability of food-at-home purchases for SNAP and non-SNAP consumer units incurring food-at-home expenditures in the reference week, by geographic area, 2006–15
Variable United States New York area
Non-SNAP, yearly SNAP, yearly Non-SNAP, weekly SNAP, weekly Non-SNAP, yearly SNAP, yearly Non-SNAP, weekly SNAP, weekly

Income (in 2015 dollars)

 23,911.68 27,420.12 459.84 527.31 22,840.48 26,580.84 439.24 511.17

Income, all sources other than SNAP

 23,911.68 23,911.68 459.84 459.84 22,840.48 22,840.48 439.24 439.24

Income, SNAP

 0 3,508.44 0 67.47 0 3,740.36 0 71.93

λ income, all sources other than SNAP

 [1] [1] 0.25 0.25 [1] [1] 0.25 0.25

λ income, SNAP

 [1] [1] [1] 0.1875 [1] [1] [1] 0.188

λ food-at-home expenditures

 [1] [1] 0.25 0.25 [1] [1] 0.25 0.25

Box–Cox transformation of income, all sources other than SNAP

 [1] [1] 4.631 4.631 [1] [1] 4.578 4.578

Box–Cox transformation of income, SNAP

 [1] [1] [1] 2.203 [1] [1] [1] 2.229

SNAP status × Box–Cox transformation of income, all sources other than SNAP

 [1] [1] [1] 4.631 [1] [1] [1] 4.578

Model predicted value

 [1] [1] 0.46 1.17 [1] [1] 0.18 0.66

Predicted probability of food-at-home purchases (control group)

 [1] [1] 61.30 76.20 [1] [1] 54.60 66.00

[1] Data not applicable.

Source: U.S. Bureau of Labor Statistics, Consumer Expenditure Diary Surveys, 2006–15.