Macroprudential policy 249
measures, especially structural measures, are only visible in the long term and
are not always quantiable even though their costs (notably implementation
and compliance costs) are immediately perceived; it is a common feature of
all structural policies. In addition, these measures target distribution tails (rare
events). This conguration can lead to perverse eects, such as a certain tol-
erance on the part of the regulator (forbearance). In this case, the use of rule-
based policies should be preferred (Saporta, 2009). This may be implemented
through quasi- automatic procedures to trigger an instrument on the basis of
indicators (ESRB, 2018).
As regards more specically the communication from the authorities re ...