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Investment in QualityTABLE 2.7Decile Shares in total Market Income, Households ranked by income,1994, 1997 and 1998Decile 1994 1997 19981st Decile 0.0 0.0 0.02nd Decile 0.0 0.0 0.03rd Decile 0.3 1.1 1.54th Decile 2.8 3.8 4.25th Decile 6.0 6.6 7.06th Decile 9.0 9.5 9.57th Decile 12.1 12.0 12.08th Decile 15.4 15.1 15.29th Decile 20.4 19.2 19.310th Decile 34.0 32.8 31.4All 100.0 100.0 100.0Inequality MeasureGini 0.565 0.536 0.520Theil 0.587 0.529 0.495Source: Nolan, B., Maitre, B., O’Neill, D., Sweetman, O. (2000a).Disposable IncomeArguably, what most determines people’s standard of living is nottheir market income but their income after payment of income taxand PRSI contributions and the receipt of money transfers(including social welfare), i.e., their disposable income. Data fromthe Household Budget Surveys confirm both the substantial rises indisposable income per household and per person that have occurredin Ireland in recent years and that the gap between high-income andlow-income households is widening.66