A study (supposedly co-authored by Fed Chair Alan Greenspan) estimated that "Americans withdrew $600 billion in equity from their homes in 2004, or 7% of their disposable income." Greenie's study estimated "consumers spend about 51% of the cash they extract." Goldman's estimates were that consumers spend ~68% of the cash they extract through home-equity loans and refinancing (most of the rest is used to pay down credit-card debt or invest).