sentence: Most economists believe that it started in the United States.
sentences_before: There are many reasons economists think this had happened.
sentences_after: From 1997 until 2006, people bought expensive houses, even though they did not have enough money for it. Since the money had come from other countries, it was easy to have good credit. People used this credit for expensive home loans. This created a housing bubble which caused the houses' prices to raise. Because they had a lot of money, the loaning companies made it easier to get a loan, even if the borrower didn't have a good credit history.
concept_name: economist
headings: Financial crisis of 2007–2008 Background and causes
categories: 2007 2008 Financial crises Stock market