A good student of mine is undertaking a graduate research thesis where impact of liquidity on profitability of banks is to be studied from a risk-management approach; using a causal research design. Kindly advise me.
I would suggest your student to start by Adam Smith's statement of the Real Bills Doctrine, in Wealth of Nations, Book II, ii, 59 (link below). Thinking about the RBD as a guide of prudent individual bank management as AS did, may help your student to frame the question of how to balance bank liquidity, profitability and risk taking. Good luck!