This paper develops a new framework and statistical tools to analyze stock returns using high-frequency data. We consider a continuous-time multifactor model via a continuous-time multivariate regression model incorporating realistic empirical features, such as persistent stochastic volatilities...

Size threshold-based regulatory requirements are pervasive, but little is known about how they affect the merger and acquisition (M&A) behavior of firms around the thresholds. M&As cause discrete increases in size, so we hypothesize changes in firms' M&A behavior near regulatory size thresholds....