Although the causes for project success and failure have been the subject of many studies, no conclusive evidence or common agreement has been achieved so far. One criticism involves the universalistic approach used often in project management studies, according to which all projects are assumed...

There exists a seemingly evident but not explicitly noted property of a polynomial function: a mean value of its roots equals the mean value of the locations of its critical points – those could be the extrema and inflexion points. This note states a theorem on it, and describes some...

Propensity scores (PS) have been studied for many years, mostly in aspects of confounder matching in the control and treatment groups. Less is still clear about the PS ability to distillate the causality effect of a treatment. This work is devoted to the problem of estimation of the causal...

Estimation of a variable’s dependence against another one is considered in a new approach based on a Coefficient of Structural Association (CSA). This method profiles the distribution of one variable along the segments formed by another one, and yields a gauge similar to the coefficient of...

Several examples useful for teaching are considered in this article. Among those, using a content of the problem to build a meaningful solution, calculus in derivation, elaborating a new concept, extensions of the known rules, and interpretation of the results. The examples include algebraic...