What is the ruling on studying usurious economics and working in usurious banks?

It is permissible to study usurious economics if the purpose is to understand usurious practices and clarify Allah's ruling on them. However, if the purpose is anything else, it is not permissible. Likewise, it is not permissible to work in usurious banks, as this constitutes cooperation in sin and aggression, as evidenced by the noble verse: ﴿And cooperate in righteousness and piety, but do not cooperate in sin and aggression.﴾