"Central to both the theoretical and the empirical validity of factor models is the correct specification of the number of factors."

"What is surprising is that almost all the trends that developed within the sciences, Aristotelianism and an…"

"Further working along the lines of experiments of 1954 , I executed the 'Figure with upraised arms' as the …"

"Social physics never can pretend to discover laws which will verify themselves in every particular, in the …"

"Now as to what pertains to these Surd numbers they are by many denied to be numbers properly speaking, and …"

"The black hole information paradox is probably the most important issue for fundamental physics today. If w…"

"Simultaneous discovery is utterly commonplace, and it was only the rarity of scientists, not the inherent i…"