How Households Adopt Sustainable Innovations? A Free Decision Enforced by Others
Table 1
Sociodemographic data of the samples in comparison to the basic population of German adults.
Study
Study I: Insulation
Study II: Solar thermal energy
Study III: E-mobility
General population
(n = 233)
(n = 232)
(n = 227)
Target group
Home owners living in owner-occupied single and two-family houses ≥ 5 years
Households considering to buy a new car
Adults in Germany
Age
M
56.3
57.4
45.6
50.2
SD
9.9
8.6
11.9
6.2
Gender
male
50%
50%
65%
50%
female
50%
50%
35%
50%
Net household income per year [€]
≤10.000
3%
5%
0%
5%
10.001-20.000
13%
15%
11%
15%
20.001-30.000
28%
22%
20%
19%
30.001-40.000
19%
23%
18%
17%
40.001-50.000
20%
12%
23%
13%
50.001-60.000
10%
12%
11%
11%
7%
12%
17%
20%
No. of household members
M
2.6
2.6
2.7
2.0
SD
1.0
1.1
1.2
1.1
Note. Data for the German population was obtained from Destatis [15, 16]. n = sample size as in number of participants, M = mean value of given variable in the sample (measured as central tendency of distribution), and SD = standard deviation of values of given variable from calculated mean in the sample.
