Abstract
In recent years, it has been observed that many internet users engage in so-called “multi-task usage” or accessing the Internet while doing something else such as watching TV, or listening to the radio or music. This phenomenon is of particular interest for the way in which time is used concurrently for different tasks but it is difficult to estimate the benefit derived from this activity by using an ordinary maximizing utility framework under budget constraints including time allocation. In this study, we consider the “multi-task usage” of the Internet as a “new service” which becomes available because of new developments in technology. We used methods of evaluating a consumer surplus when there is a new product or service in the market. Based on the data available, our estimate indicates that the surplus amounts to about JPY 3,500 a day for an average user and that this can be greater within the current smart phone usage environment.
