Correlational Subjects » ERA (temporal period) » Average happiness in era » Trend average happiness in era » Trend average happiness in special publics » Trend average happiness in income groups
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ERA (temporal period) Average happiness in era Trend average happiness in era Trend average happiness in special publics Trend average happiness in income groups - Related correlational subjects
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- Related specification variables
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- Related bibliographic subjects
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- Related special publics
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- Keywords
- income bracket, poor, rich