In this note we describe a new fast algorithm for computing the fractal dimension of binary images. The algorithm computes the digitized version of the “Minkowski sausages” by simple shift and logical OR operations.

Over the past decade, researchers have paid attention to crowdfunding as a promising way to foster entrepreneurship and innovation. In this paper, we set out the state of the crowdfunding phenomenon in Africa, with a particular focus on sub-Saharan Africa. We review and summarize all the...

We study time-varying realized volatility and related correlation measures as proxies for the true volatility and correlation. We investigate measures of Two-Scale realized Absolute Volatility (TSAV) and correlation (TSACORxy) which are helpful to cope effectively with the problem of market...