Gasoline.csv contains the following variables (variable names are

listed in the first row).  All variables are numeric.



ly      Income in log

lp      Price in log

lq      Quantity in log

da1     Demand at location A1

da2     Demand at location A2

da3     Demand at location A3

da4     Demand at location A4

da5     Demand at location A5

da6     Demand at location A6

da7     Demand at location A7

da8     Demand at location A8

da9     Demand at location A9

db1     Demand at location B1

db2     Demand at location B2

db3     Demand at location B3

db4     Demand at location B4

db5     Demand at location B5

db6     Demand at location B6

db7     Demand at location B7

db8     Demand at location B8

year1   Year 1 dummy

year2   Year 2 dummy

year3   Year 3 dummy

year4   Year 4 dummy

year5   Year 5 dummy

year6   Year 6 dummy

id      Observation id