Figure 11 Combined parameter estimates for cohort and age in model 9
□ 1-1.2
□ 0.8-1
□ 0.6-0.8
□ 0.4-0.6
□ 0.2-0.4
□ 0-0.2
effect
0
2000
1997
1994 year
1991
7
9
11
13
1
age
3 5
11988
2.5
2
1.5
1
0.5
□ 2-2.5
□ 1.5-2
□ 1-1.5
□ 0.5-1
□ 0-0.5
Figure 12 Combined parameter estimates for age and period (year) in model 9
18