We propose a theory of quantum (statistical) measurement which is close, in spirit, to Hepp’s theory, centered on the concepts decoherence and macroscopic (classical) observables, apply it model Stern-Gerlach experiment. The number N degrees freedom measuring apparatus such that $$N \rightarrow \infty $$ , justifying adjective “statistical”, but, addition, contrast approach, we make three-fold ...

This article is a response to the March, 2013, special issue of the AMS Review, which was purportedly about "scientific progress in marketing" but in fact was about measurement in marketing. Even narrower than that, the special issue was about "formative measurement" in marketing. The present article contends that the problems raised by the special issue's authors were solved earlier by Rossite...