Tanner's study partner asks him, "Which German physiologist is associated with the trichromatic theory of color vision?" "Um . . . von . . . von . . . I know it! 'H' something . . . ," Tanner manages. Tanner is experiencing:

In financial aspects, a depression is a sustained, long haul downturn in monetary movement in one or more economies. it is a more extreme monetary downturn than a recession, which is a slowdown in financial action through the span of a typical business cycle. a depression is an irregular and extreme type of recession. so depression is always followed by recession but it is not correct to state that a depression always follow a recession.