other ninety percent and the measure of inequality is this area here um this is called the genie index and one minus this area is what this paper has as an equality measure so the higher this number the more equal is the society in terms of their income distribution now what is actually optimized for here is this thing equality times productivity so you want both to be high your income equality and your productivity there's a trade-off here of course but you can you can have multiple ways to trade that off and that will give you