But I can’t help noticing an ominous correlation. The country in Europe with the biggest untaxed, or “shadow,” economy as a proportion of GDP is Greece. Next is (gulp) Italy. Then Portugal and Spain. On the chart below, in fact, the bars look unsettlingly like dominoes.
Much of the problem in these countries in Europe, in other words, is tax evasion. As the chart shows, the size of the shadow economy in Italy and Greece is much larger than in other developed countries, inside and outside the Euro area. http://www.multiplier-effect.org/?p=75