_The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "proportionality" appeared
2020-07-02 : In the spirit of European cooperation2019-03-27 : Necessity, proportionality and probity – central bank independence in unconventional times
2018-09-06 : Financial stability and the ECB
2018-05-29 : Euro Clearing – the open race
2016-04-09 : Scope and Limits of Monetary Policy