Table 7 Sensitivity analysis: including a dummy only for self-employed interacted with income classes and demand groups

Number of prescriptions

3.805***

9.052***

Female

3.592***

–6.630***

Age

0.222***

0.792***

Number of children

–0.286***

–1.746***

Family members with disability

2.674***

5.387*

Dependent spouse

–0.444***

–5.422***

Self Employed

2.489

–0.487

Income classes

 8,000

2.641*

-1.856

 8,001−15,000

7.573***

7.664

 15,001−24,000

9.287***

14.36*

 24,001−35,000

11.18***

18.55**

 35,001−55,000

14.76***

26.01***

 55,001−75,000

12.74***

16.41*

 >75,001

5.228***

1.454

Demand groups

 Group #1

–35.69***

–32.45***

 Group #2

–34.74***

–59.10**

Interaction income classes-demand groups

 8,000 # Group #1

–1.688

–5.578

 8,000 # Group #2

–3.386

–0.212

 8,001−15,000 # Group #1

–7.694***

–15.86

 8,001−15,000 # Group #2

–8.731**

–14.29

 15,001−24,000 # Group #1

–7.252***

–15.36

 15,001−24,000 # Group #2

–10.53***

–22.78

 24,001−35,000 # Group #1

–9.409***

–18.91*

 24,001−35,000 # Group #2

–12.16***

–28.55

 35,001−55,000 # Group #1

–11.39***

–23.16**

 35,001−55,000 # Group #2

–14.90***

–35.84

 55,001−75,000 # Group #1

–10.52***

–17.76*

 55,001−75,000 # Group #2

–12.02***

–24.82

 >75,001 # Group #1

–7.876***

–13.06

 >75,001 # Group #2

–5.68

–10.94

Interaction income classes-self employed

 8,000 # Self Employed

–3.786*

–3.611

 8,001−15,000 # Self Employed

–5.629***

–4.236

 15,001−24,000 # Self Employed

–8.117***

–5.236

 24,001−35,000 # Self Employed

–9.487***

–11.69

 35,001−55,000 # Self Employed

–11.13***

–13.32

 55,001−75,000 # Self Employed

–8.184***

–6.413

 >75,001 # Self Employed

–6.888***

–4.844

Interaction demand groups-self employed

 Group #1 # Self Employed

–0.796

0.195

 Group #2 # Self Employed

–2.629

–3.847

Interaction income classes-demand groups-self employed

 8,000 # Group #1 # Self Employed

2.39

12.91

 8,000 # Group #2 # Self Employed

3.949

7.438

 8,001−15,000 # Group #1 # Self Employed

4.813**

11.95

 8,001−15,000 # Group #2 # Self Employed

6.03

7.423

 15,001−24,000 # Group #1 # Self Employed

5.258**

5.518

 15,001−24,000 # Group #2 # Self Employed

7.415

6.923

 24,001−35,000 # Group #1 # Self Employed

6.387***

9.65

 24,001−35,000 # Group #2 # Self Employed

8.242*

12.58

 35,001−55,000 # Group #1 # Self Employed

7.309***

9.288

 35,001−55,000 # Group #2 # Self Employed

9.505*

14.1

 55,001−75,000 # Group #1 # Self Employed

4.911**

8.113

 55,001−75,000 # Group #2 # Self Employed

5.503

4.98

 >75,001 # Group #1 # Self Employed

5.616***

11.57

 >75,001 # Group #2 # Self Employed

5.087

4.929

ASL dummies

included

included

Marital status dummies

included

included

Constant

38.15***

47.79***

Observations

2,301,571

2,301,571

R-squared

0.607

0.166

BIC

24,620,686.1

32,831,464.5