This paper examines return predictability of the U.S. stock market using portfolios sorted by size, book-to-market ratio, and industry. A novel panel variance ratio test is proposed and employed to evaluate time-varying return predictability from 1964 to 2011. It is found that the stock returns...

China is the world's largest investor and greatest contributor to global economic growth by wide margins. The efficiency of its financial system in allocating capital to investment will be important to sustain this growth. This paper shows that China's stock market has a crucial role to play....