Considering collectively the selected indicators presented in Figure 1.6.2, Canada, Denmark, Estonia, Hong Kong (China) and Macao (China) stand out by achieving both high performance and high equity in education opportunities. As shown in Chapter 2, countries with higher national incomes are at a relative advantage in performance comparisons. However, the relationship between national income and mean performance is not deterministic, and countries and economies of similar wealth show very different mean performance in PISA 2015.