We experimentally study behavior in an endogenous-timing herding game. We find that subjects respond to their type and to observed investment activity in a sensible way, but there are also substantial departures from Nash Equilibrium. Some departures can be viewed as mere noise in decision making while other departures represent systematic biases reflecting subjects’ failure to appreciate subtl...

There are two widely held theories of color constancy based on very different mechanisms: Chromatic Adaptation and Spatial Comparisons. Chromatic Adaptation is based on the change of retinal sensitivity in response to changes in incident light. The Spatial Comparisons mechanism is insensitive to illumination changes because it uses ratios of radiance from different pixels in the image. A spatia...

This paper presents a non-parametric method for testing departures from a uniform seasonal variation in incidence of disease. The method may be used either with exact dates of incidence when they are available or with monthly totals. It is equally valid for sinusoidal and non-sinusoidal departures from uniformity. A simulation study shows it to be much more powerful than other non-parametric al...