In this article, the random-walk theory of stock-price behavior is tested empirically in relation to a number of decision rules based upon past stock-price movements. A random sample of thirty stocks ...

In high dimensions, the classical Hotelling's T² test tends to have low power or becomes undefined due to singularity of the sample covariance matrix. In this article, this problem is overcome by ...

In conclusion, a generator based on the measurement of pure quantum states to produce true and unique random numbers has been demonstrated. By measuring a vacuum state with a simple homodyne ...