In 2016, Eugene Fama mentioned that he wanted a systematic way of identifying and predicting a stock market bubble. This paper develops a simple statistical method to sequentially monitor the stock market price changes. A new and simple boundary function is proposed, and asymptotic properties...

This article examines the heterogeneous emission effects among exporting firms. We propose that, in addition to the reduction effect of technology adoption on exporting firms' emissions, there exists an incremental effect of higher safety standard compliance. We develop a simple theoretical...