We develop a model to rationalize and examine so-called “research bubbles”, i.e. research activities based on … overoptimistic beliefs about the impact of this research on the economy. Research bubbles occur when researchers selfselect into … innovation and growth. In an overlapping generations framework, we study the occurrence of research bubbles and show that they …

This paper reports empirical tests for the existence of rational bubbles in stock prices. The analysis focuses on a … extraneous variables. The tests are based on the theoretical result that, if rational bubbles exist, time series obtained by …. Applications of the time domain tests to simulated nonstationary time series that would be implied by rational bubbles indicates …

the dot-com peak 20 years ago. In both instances, a very broad subset of stocks became so highly valued that speculation …, drawn from a book in progress, examines the history of stock markets for comparable pure price-chasing bubbles, finding nine … way down - of these greatest asset bubbles in human history. When one applies this framework to the current US stock …

This paper examines whether theoretical models of bubbles based on the notion that the price of an asset can deviate … from its fundamental value are useful for understanding phenomena that are often described as bubbles, and which are … trading would emerge. In addition, I show that these models imply that speculative bubbles can be associated with low rather …

This paper develops a general equilibrium model to examine the quantitative effects of speculative bubbles on capital … late 1990s. The welfare cost of speculative bubbles depends crucially on parameter values. Bubbles can improve welfare if …, the welfare cost of bubbles is large, typically exceeding one percent of annual consumption …