We collect well known and less known facts about the bivariate normal distribution and translate them into copula language. In addition, we prove a very general formula for the bivariate normal copula, we compute Gini's gamma, and we provide improved bounds and approximations on the diagonal.

Supply chains are faced with a rising complexity of products, structures, and processes. Because of the strong link between a supply chain’s complexity and its efficiency the supply chain complexity management becomes a major challenge of today’s business management. A two dimensional driver...

We consider economic development of Sub-Saharan Africa from the perspective of slow convergence of productivity, both across sectors and across firms within sectors. Why have “productivity enclaves”, islands of high productivity in a sea of smaller low-productivity firms, not diffused more...