The aim of this paper is to present novel tests for the early causal diagnostic of positive and negative bubbles in the … LPPLS (log-periodic power law singularity) approach successfully diagnoses positive and negative bubbles, constructs … efficient End-of-Bubble signals for all of the well-documented bubbles, and obtains for the first time new statistical evidence …

forecasts -- to the ex post and ex ante prediction of stock price bubbles. For a panel of six OECD economies covering 24 years … signalling of stock price booms and bubbles. …