The ECB will have to reflect on complex economic analysis problems

Once Christine Lagarde joins the ECB, she will have to reflect on some complex economic analysis problems generated by the very expansionary monetary policy that is being conducted. In particular, what are the effects of very low interest rates on: Borrower solvency; Investment, when the return on equity remains high; The exchange rate; Banks ; Companies (zombie firms); Asset prices; The level and structure of savings; Redistributive, income and wealth effects. All things considered, is the net effect of very low interest rates on the economy positive or negative? The ECB will need strong economic expertise to be able to answer this question.