question: Who believed that the growth of the commercial real estate bubble indicated that U.S. housing policy was not the cause of the crisis ?
answer: Krugman
turker_answer: Krugman believed that the growth of the commercial real estate bubble indicated that U.S. housing policy was not the cause of the crisis .
rule-based: Krugman believed that the growth of the commercial real estate bubble indicated that U.S. housing policy was not the cause of the crisis .