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In this article the authors’ objective is to discover the extent to which the economic concept of interest-adjusted income taxation, which from a national standpoint is most attractive, can also render a country more attractive as a business location in global tax competition. In order to achieve this objective the authors first attempt to determine the rules that must be complied with by a country in the structuring of its domestic tax law against the background of global tax competition. A central factor here is the prohibition of tax discrimination between domestic and foreign taxpayers, whereby domestic tax law is subservient to the requirements of international tax law. National sovereignty remains intact, however, with regard to the choice of a concept for the tax system to be adopted. With this in mind, the authors show that the attractiveness of a country as a business location with a given tax rate is enhanced by the introduction of an interest-adjusted income tax with the deduction of interest on equity capital as a special feature. This is refl ected in the principal international measure of the tax burden, the Effective Average Tax Rate (EATR)., Autori u ovome radu pokušavaju odrediti u kojoj mjeri ekonomski koncept oporezivanja dohotka umanjenog za kamate (koji je sa nacionalnog stanovišta najatraktivniji) može učiniti zemlju privlačnijom poslovnom lokacijom u uvjetima globalne porezne konkurencije. Da bi postigli taj cilj, autori najprije pokušavaju odrediti pravila kojih se mora pridržavati neka zemlja kod oblikovanja domaćeg poreznog zakonodavstva, uzimajući u obzir globalnu poreznu konkurenciju. Ovdje se najviše mora voditi računa o zabrani porezne diskriminacije između domaćih i stranih poreznih obveznika, pri čemu je domaći porezni zakon podređen međunarodnome. Zemlja međutim zadržava suverenitet, jer sama odlučuje o izboru koncepta poreznog sustava. Imajući to na umu, autori pokazuju da se privlačnost neke zemlje kao poslovne lokacije povećava ako se uvede oporezivanje dohotka umanjenog za kamate, s odbitkom kamata na dionički kapital kao posebnim obilježjem. Odraz toga je osnovna međunarodna mjera poreznog opterećenja (the Effective Average Tax Rate – EATR).