After a prolonged period of crisis, Greece’s economic outlook seems to be improving. GDP growth is up, and unemployment is down. A successful sovereign bond issuance in recent weeks has added to that optimism. Since the most acute phase of the crisis, which many feared would see the beleaguered nation leave the euro area, Greece’s market-implied probability of default within the next five years has fallen from almost 100% back in 2015, to just 40% or so in recent weeks....