est autocorrélée. Ainsi, un marché a des chances de baisser au cours d'une année N s'il baissait déjà au cours de l'année N-1. Réciproquement, si les prix augmentent au cours d'une année, il existe de fortes chances pour qu'ils augmentent à nouveau l'année suivante. Des périodes pluriannuelles de hausse succèdent donc, après des retournements du marché, à des périodes pluriannuelles de baisse des prix ;
Apple released three computers bearing the Centris name: the Centris 610 (replacing the Macintosh IIsi) and Centris 650 (replacing the Macintosh IIci in form and the Quadra 700 in function), both of which were introduced in March 1993, and the Centris 660AV which followed in July. Apple also considered the Macintosh IIvx to be part of the Centris line. The IIvx was released in October of the previous year, but, according to Apple, their lawyers were unable to complete the trademark check on the "Centris" name in time for the IIvx's release.
Male C. pallida are able detect the pheromones which females release and use them to locate female burrows. When a virgin female is about to emerge from her burrow, she releases a scent that wafts up through the soil and is detected by the antenna of the males. This has led to males developing a very acute olfactory sense. Freshly-killed females have been buried to test whether sound also plays a part in male signaling. In these tests, male bees still dug up the dead females, proving that pheromone signaling is the only pathway. Males have also been observed to dig up other males. This shows that males and virgin females give off similar pheromones. Oddly, males also sometimes dig up other digger bee species. It is currently unknown why this occurs.