Concentration phenomena concern the ICT market. Though the regulatory action has been active mainly in the telecom network operators industry, even more significant worldwide concentration phenomena affect other industries. The market of mobile operating systems is analysed through two concentration indices to get a quantitative picture of the current situation and its evolution over time: the ...

We investigate the impact of Certificate of Need (CON) Law and its stringency on Inpatient market competition measured by the Herfindahl-Hirschman Index (HHI). We show that on average the CON legislation enhances competition between Inpatient units. Additionally, the size, demographics, and health insurance coverage of the state population are found to significantly impact Inpatient market comp...

In most markets, buyers differ in their ability or willingness to switch supplier. This note proposes a novel industry concentration measure that takes this heterogeneity into account. The index increases the share of captive sales, coincides with Hirschman–Herfindahl Index when none are captive, and ”pure monopoly” value 1 all captive.

Abstract Over several decades, the Vietnamese government has increasingly cut its investment in public higher education system and also introduced a cost-sharing mechanism. Under this scheme, universities have been seeking other sources of revenue. Despite bold emphasis on need for revenue diversification Vietnam, there is little empirical evidence status quo finance. The purpose paper was to f...