Shop normally used
1 = Solo
2 = Kwik Save
3 = Tesco
4 = gateway
5 = Iceland
6 = Sainsburys
7 = Asda
8 = Co-op
9 = Somerfields
10 = Aldi
11 = Safeway
12 = Local shops
13 = Lo-cost
14 = Pioneer
15 = Food Giant
16 = Makro
17 = Spar
18 = Corner shop

-99 = Missing value
-77 = Unrealistic total

wekly take home pay
-99 = missing

Use car?
-99 = missing
0 = no
1 = yes

1 = yes
2 = no

Distance of house from supermarket
-99 = missing
1 = <1 mile
2 = 1-5 miles
3 = 5-10 miles
4 = >10 miles

respondent's gender
-99 = missing
0 = female
1 = male