# Table 6 Determinants of individual copayment and cost-of-service

Dependent variable
Independent variables Copayment (Model #1) Cost (Model #2)
Number of prescriptions 3.805c 9.055c
Female 3.701c –6.507c
Age 0.236c 0.946c
Number of children –0.285c –2.190c
Family members with disability 2.622c 4.915a
Dependent spouse –0.662c –6.176c
Self Employed –1.194c 0.817
Employed 2.632c 6.631c
Retired 1.694c –1.715a
Income classes
<8,000 –0.546 –3.672
8,001−15,000 2.768c 3.536
15,001−24,000 3.991c 9.651a
24,001−35,000 5.613c 12.61c
35,001−55,000 8.880c 19.70c
55,001−75,000 7.062c 10.46b
>75,001 –0.48 –4.908
Demand groups
Group #1 –36.22c –32.09c
Group #2 –36.59c –61.42c
Interaction income classes-demand groups
<8,000× Group #1 –0.535 –0.891
<8,000× Group #2 –1.068 3.676
8,001−15,000× Group #1 –6.199c –13.24b
8,001−15,000× Group #2 –6.126c –11.03
15,001−24,000× Group #1 –6.092c –14.79c
15,001−24,000× Group #2 –8.025c –19.92
24,001−35,000× Group #1 –8.092c –17.79c
24,001−35,000× Group #2 –9.537c –24.93a
35,001−55,000× Group #1 –10.06c -22.44c
35,001−55,000× Group #2 –12.23c –32.42b
55,001−75,000× Group #1 –9.340c –16.85c
55,001−75,000× Group #2 –9.743c –22.48a
>75,001× Group #1 –5.991c –10.16a
>75,001× Group #2 –3.142 –8.194
ASL dummies included included
Marital status dummies included included
Constant 40.12c 40.48c
Observations 2,301,571 2,301,571
R-squared 0.607 0.166
BIC 24,620,754.3 32,831,101.4
1. Legend: a 10% significance level; b 5%; c 1%