Nearly 150 economists - including France’s Thomas Piketty and Hungary’s László Andor - and political players - including Belgium’s Paul Magnette and France’s Aurore Lalucq (S&D) - have called on the euro area countries and the European Central Bank (ECB) to sign a “contract“ under which “the ECB undertakes to write off the public debts it holds (or to transform them into interest-free perpetual debts), while the States undertake to invest the same amounts in environmental and...