Finance as an (ever more fragile) ‘perpetual mania’: have they all lost their collective minds?

Have Americans Lost Their Minds?

Randomized Clinical Trials on Trial: Have They Lost Their Appeal?

More on Finance and Growth: More Finance, More Growth?

JULY/AUGUST 2003 31 Nobel Prize winners disagree about the impact of the financial sector on economic growth. Some do not even consider finance worth discussing. A collection of essays by the “pioneers of development economics”—including three winners of the Nobel Prize in Economics—does not discuss finance (Meier and Seers, 1984). At the other extreme, Nobel Prize winner Merton Miller (1998, p...

kids and teenager are sleepy at school because the electronic media they have in their bedrooms leads them to have delayed sleep phase disorder (dspd)

bserved by many teachers that most of the time, mumbling and searching for their intended words, students complain why they have forgotten the words they have learned in the previous semesters. they ask for some new ways that may help them to recall and apply the learned words more efficiently, since as they declare one of the most important skills in foreign language learning is having a g...

Finite groups have even more centralizers

For a finite group $G$‎, ‎let $Cent(G)$ denote the set of centralizers of single elements of $G$‎. ‎In this note we prove that if $|G|leq frac{3}{2}|Cent(G)|$ and $G$ is 2-nilpotent‎, ‎then $Gcong S_3‎, ‎D_{10}$ or $S_3times S_3$‎. ‎This result gives a partial and positive answer to a conjecture raised by A‎. ‎R‎. ‎Ashrafi [On finite groups with a given number of centralizers‎, ‎Algebra‎ ‎Collo...