in reality,these interact with each other,and modelling this interaction in order to make projections for the future can be very difficult.You may recall from Chapter 4 that predictions were made at the start of the dotcom boom that have proved to be quite inaccurate=virtual conferences have not led to the disappearance of face-to-face conferences,as some predicted; online shopping has been growing,but real shops have remained very popular; teleworking from home has not spread as widely as many had expected Of course,it is possible that each of these predictions could eventually come true, but it is difficult to understand the complexity of factors that may cause this to happen.