David Ball, the company's development director, admits that the new products are not direct substitutes for halons. (newscientist.com)
«There are concerns that digital media will cannibalize print media, based on the general decline in newspaper sales and take - up of online news services in many parts of the world, but the evidence from our research is that print and online are not generally regarded as direct substitutes by consumers,» said Nick Ingelbrecht, research director at Gartner. (gartner.com)
«It's a very hard thing to do a study of because you have to ask consumers «those ebooks that you downloaded illegally, how many of them are actual direct substitutes for sales»?» (phys.org)