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

Number of prescriptions

3.805^c

9.055^c

Female

3.701^c

–6.507^c

Age

0.236^c

0.946^c

Number of children

–0.285^c

–2.190^c

Family members with disability

2.622^c

4.915^a

Dependent spouse

–0.662^c

–6.176^c

Self Employed

–1.194^c

0.817

Employed

2.632^c

6.631^c

Retired

1.694^c

–1.715^a

Income classes

 <8,000

–0.546

–3.672

 8,001−15,000

2.768^c

3.536

 15,001−24,000

3.991^c

9.651^a

 24,001−35,000

5.613^c

12.61^c

 35,001−55,000

8.880^c

19.70^c

 55,001−75,000

7.062^c

10.46^b

 >75,001

–0.48

–4.908

Demand groups

 Group #1

–36.22^c

–32.09^c

 Group #2

–36.59^c

–61.42^c

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

–6.199^c

–13.24^b

 8,001−15,000× Group #2

–6.126^c

–11.03

 15,001−24,000× Group #1

–6.092^c

–14.79^c

 15,001−24,000× Group #2

–8.025^c

–19.92

 24,001−35,000× Group #1

–8.092^c

–17.79^c

 24,001−35,000× Group #2

–9.537^c

–24.93^a

 35,001−55,000× Group #1

–10.06^c

-22.44^c

 35,001−55,000× Group #2

–12.23^c

–32.42^b

 55,001−75,000× Group #1

–9.340^c

–16.85^c

 55,001−75,000× Group #2

–9.743^c

–22.48^a

 >75,001× Group #1

–5.991^c

–10.16^a

 >75,001× Group #2

–3.142

–8.194

ASL dummies

included

included

Marital status dummies

included

included

Constant

40.12^c

40.48^c

Observations

2,301,571

2,301,571

R-squared

0.607

0.166

BIC

24,620,754.3

32,831,101.4