Menzie Chinn and Jeffrey Frieden tackle the Sixty-four- thousand million billion dollar question in the LaFollette Policy Report : What caused the crisis? De-regulation and the "1990s era amendments to the 1977 U.S. Community Reinvestment Act? Greed? "Overly loose monetary policy"? East Asian oil-rich nations building up a "savings glut"? Some, or maybe even all, of these factors might have exacerbated the crisis. But Chinn and Frieden say the cause is fairly straightforward for those who have looked at some past international economic crises, like those of East Asia in 1997-98, Germany in the 1930s, and the US in the 1890s. This is an example of a "capital flow cycle," and it all comes down to the US debt problem, they write. By 2004, the federal budget deficit was more than $400 billion, the largest in history. As shown in Figure 1 (below), this deficit rivaled those of the Reagan deficits of the early and middle 1980s. The government ran these deficits with ease, for it could borrow just about as much as it wanted internationally. This ready access to capital funds was the new reality of globally integrated financial markets. The result was a continual rise in America’s foreign debt, expressed as a share of GDP. This is most clearly seen in the size of the country’s current account deficit, the amount the country needs to borrow from the rest of the world to pay for the excess of its imports over its exports. In other words, a current account deficit means that the country is not covering its current expenses out of current earnings, so that it must borrow the difference from abroad. Between 2001 and 2007, the American current account deficit averaged between $500 billion and $1 trillion every year, resulting in a current account deficit equal to an unprecedented 6 percent of GDP in 2006, as Figure 2 shows. For a while, this borrowing failed to manifest itself in a corresponding degree of indebtedness to the rest of the world—largely because the dollar’s value fell over this period (and most of America’s assets abroad are denominated in foreign currency). However, that string of good luck ended in 2008, when America’s net indebtedness to the rest of the world deteriorated substantially (about $1.3 trillion). This episode demonstrates that, in fact, there is no such thing as a free lunch, no matter how much things appear to change. Read Reflections on the Causes and Consequences of the Debt Crisis of 2008 here .