“…The investors' beliefs as components of animal spirits are also considered in several other studies (Daniel, Hirshleifer and Subrahmanyam, 1998;Haruvy, Stahl and Wilson, 1999;Weinstein, 1989;Otten, 1989;De Bondt and Thaler, 1987;Barberis Journal of Economic and Social Studies Shleifer and Vishny, 1998;Ciccone, 2003;Piroscă, 2011). A point of view commonly shared by the major of authors is that investors' beliefs impact significantly the economy works and explain in a major part the economy dysfunction.…”