In pricing theory, the scarcity principle suggests that the price for a scarce good should rise until an equilibrium is reached between supply and demand. However, this would result in the restricted exclusion of the good only to those who can afford it.
Children aged between three and seven should be limited to half-an-hour to an hour of screen time each day, he said. Those aged seven to 12 should spend just one hour in front of screens. Children aged 12 to 15 should have a maximum of 1.5 hours in front of screens and those aged 16 and over should spend just two hours, he recommends. ''Reducing total daily screen time for children, and delaying the age at which they start, could provide significant advantages for their health and wellbeing,'' he writes.
No. 54; December 2015. Children and adolescents spend a significant amount of time watching screens each day - including televisions, gaming consoles, computers, tablet devices and smartphones. Children in the United States ages 8 -18 spend on average 7.5 hours a day with media and technology screens. Television watching is now done on all of these devices â including Netflix, Hulu and Youtube as well as traditional broadcast television. By the time of high school graduation, they will have spent more time watching screens than they have in the classroom.