I'm not a business major but when predicting revenues for the next month or year, there is a graphical survey on previous years. Comparing each of them so there will be a good SALE in the comming months or years. I think Economists are good at this. My point is that when there is/are predictions, there should be enough statitiscal data to support. Science provided these things...
I don't see or hear any statistical data in the bible that confirms that it will happen. Just to add what Chad said... thanks sir.