| Correlation of non-income factors with income |
Impact on perception of | t, d: the non-income factors affect perception 11of welfare, and given factors are correlated with income | t, d: the non-income factors affect perception of 12welfare, and given factors are not correlated with income |
welfare | t2, d1: the non-income factors do not affect perception of welfare, and given factors are correlated with income | t2, d2: the non-income factors do not affect perception of welfare, and given factors are not correlated with income |