Chapter 16
16.2). Even in China, happiness was no higher in 2010 than
it was in 1990.^15
We would be very happy if the cross- section of countries
could predict the time- series. But the cross- section surely
reflects an element of international comparison, in which
case income gains all round the world will have less effect
than the table implies. However, we do not think that in-
come gains and losses should be treated as unimportant,
and we recommend that a sensible approach to income in
project evaluation would be to assume that a doubling of
income raises happiness by 0.12 points (as in the first col-
umn of Table 16.2).
Figure 16.2. Average income and well- being over time
Year Year
Life
-satisfa
ctio
n 1–
7
GD
P pe
r capita
($
20
10
,^000
’s)
6
5
4
38
36
34
32
30
28
1995 2000 2005 2010 2015
Britain (BHPS)
Life
-satisfa
ctio
n
0–
10
GD
P pe
r capita
($
20
10
,^000
9 ’s)
8
7
6
5
45
40
35
30
25
1980 1990 2000 2010 2020
West Germany (SOEP)
Life
-satisfa
ctio
n
0–
10
GD
P pe
r capita
($
20
10
, 000’
9 s)
8
7
6
5
44
42
40
38
36
2000 2005 2010 2015
Australia (HILDA)
Happiness
1–
3
GD
P pe
r capita
($
20
10
, 000’
3.0 s)
2.5
2.0
1.5
50
40
30
20
10
1940 1960 1980 2000 2020
USA (AIPO+GSS)