What is the most important factor in predicting how a supreme court justice will vote?

The most important factor in predicting how a supreme court justice will vote is "the justice's ideological predilections".

A predilection is an inclination for or predisposition toward something. In the event that you have a preference for a certain ideology for example a Justice has a soft spot ideologically for Obama administration or for that matter anyone else, this will affect the judgment they make.

no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.

can you explain it better