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  • Michaël Peeters thinks this is interesting:

A glance at the above ratios shows that they are all related. All of the six variables below the RoE/RoC ratio will impact the final RoE number, so it is possible to generate higher return by altering only one of them (the taxation variable is outside the control of the bank of course)

From

Cover of The Principles of Banking

Note

look at figures above