Noise Bubbles
Noise Bubbles
复制标题
噪音气泡
DOI:
--
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Luca Sala
中科院分区:
文献类型:
--
作者:
Mario Forni;Luca Gambetti;Marco Lippi;Luca Sala
We introduce imperfect information in stock prices determination. Agents receive a noisy signal about the structural shock driving future dividend variations. Equilibrium stock prices include a transitory "noise bubble" which can be responsible for boom and bust episodes unrelated to economic fundamentals. We propose a non-standard VAR procedure to estimate impulse response functions to noise shock and the bubble component of stock prices. Noise explains a large fraction of US stock prices. The dot-com bubble is explained by noise. The 2007 stock price boom is not a bubble, whereas the following stock market crisis is due to negative noise shocks.