Estimation of the covariance matrix of asset returns is crucial to portfolio construction. As suggested by economic theories, the correlation structure among assets differs between emerging markets and developed countries. It is therefore imperative to make rigorous statistical inference on...

This paper examines the effect of information technologies on stock price crash risk. Information technology advancements change the way firm-specific information is disseminated and acquired, providing significant benefits to investors. We use the required staggered implementation of the SEC's...

We investigate the association between material weakness in internal controls (MW) disclosed under Section 302 of SOX and future stock price crash risk. We argue that relative to firms with effective internal controls, firms with MW have lower financial reporting precision. The lower reporting...

Firms with higher R&D intensity subsequently experience higher stock returns in international stock markets, highlighting the role of intangible investments in international asset pricing. The R&D effect is stronger in countries where growth option risk is more likely priced, but is unrelated to...