Study Timmermans (1997): study EE 1990
- Public
 - 18+ aged, general public, Estonia, 1990
 - Sample
 - Respondents
 - N = 1008
 - Non Response
 - Assessment
 - 
        Interview: face-to-face                    
Structured interview 
Correlate
- Authors's Label
 - Household income
 - Our Classification
 - 
            
 - 
                        
 - Operationalization
 - Single question: "Here is a scale of incomes and we would like to know in what group your household is, counting all wages, salaries, pensions and other incomes that come in" rated on a a 10-point scale.
1 Less than 50 Rubles per month
2 51 - 70
3 71 - 100
4 101 - 150
5 151 - 200
6 201 - 300
7 301 - 500
8 501 - 800
9 801 - 1000
10 More than 1000 Rubles per month 
Observed Relation with Happiness
2 M=2.48 Mt=4.9
3 M=2.58 Mt=5.3
4 M=2.63 Mt=5.4
5 M=2.58 Mt=5.3
6 M=2.59 Mt=5.3
7 M=2.84 Mt=6.1
8 Less than 10 Ss
9 Less than 10 Ss
10 Less than 10 Ss
2 M=5.83 Mt=5.4
3 M=5.70 Mt=5.2
4 M=6.31 Mt=5.9
5 M=5.86 Mt=5.4
6 M=6.50 Mt=6.1
7 M=6.15 Mt=5.7
8 Less than 10 Ss
9 Less than 10 Ss
10 Less than 10 Ss
2 M= .55 Mt=5.5
3 M= .69 Mt=5.7
4 M= .85 Mt=5.9
5 M= .89 Mt=5.9
6 M= .98 Mt=6.0
7 M= .59 Mt=5.6
8 Less than 10 Ss
9 Less than 10 Ss
10 Less than 10 Ss