Political goods tend to reinforce each other. For example countries with good, free or cheap higher education tend also to have high social mobility. Whilst countries with robust welfare systems tend to do well with the overall health of the population.

Hence countries high on one index tend to also be high on others.

Political goods tend to reinforce each other. For example countries with good, free or cheap higher education tend also to have high social mobility. Moreover, an informed citizenry can hold the government to account more effectively. Whilst countries with robust welfare systems tend to do well with the overall health of the population.

Hence countries high on one index tend to also be high on others.