statistical market definition method for cluster markets, and applies the method to the Korean Internet portal service market. The … results of analyses show that there is one market for the Korean Internet portals and confirm the concern that the a priori … definition of the Internet portal service market using a representative group of services like 1S4C, which was used by the Korea …

performance of local demand from a detailed database of broadband internet subscribers, discriminated by the main attributes of an … internet subscription contract as location, supplier, monthly-fee, download- and upload-speed features. From these results, we … are able to identify the effect of quality regulation on the behavior of internet providers in a differentiated product …