KNOX'S REVOLVING INVALID BED.

Invalid Recipes

The Revolving Door

The revolving door between the government and the private sector has long been presumed to lead to the capture of regulators by industry interests. A growing body of empirical literature, however, either finds no conclusive evidence of a capture effect or finds evidence of an opposite effect that the revolving door indeed results in more aggressive, not less aggressive, regulatory actions. To a...

Revolving Door Scenario for

IN THIS ISSUE In this issue of Physics & Society, we continue our series on the risks of nuclear weapons after the Cold War. In their article Illicit Trafficking of Weapons-Usable Nuclear Material: Facts and Uncertainties, Lyudmila Zaitseva and Friedrich Steinhausler have provided us with a very detailed look at what is known about the smuggling of fissile materials. They have also provided a r...

Invalid measurement validity.

Concurrence looks at how a measure relates to a gold standard. If, as frequently occurs, there isn’t one, the next best is the correlation with other established measures. This assumes that the latter are themselves valid, which may not be true, and risks stifling innovation, a source of concern if a paper is criticized on this ground. More straightforwardly, concurrence also means that a test ...

Inductive Signals: Revolving vertebrates

An old idea about the relationship between arthropod and vertebrate body plans has been given new life by studies of the signalling genes controlling dorsal and ventral development in Drosophila and Xenopus.