Serbia's interference in Kosovo has caused significant problems. UNMIK was given exclusive rights to manage Kosovo's economic affairs and stated its intent in the Constitutional Framework to establish a market economy. Prior to 1999, much of Kosovo's economy had been controlled by the state. All publicly owned enterprises were owned by the Yugoslav government or the Serbian state, both governed from Belgrade. When UNMIK began implementing privatization of assets that it did not own, Serbs with interests in the companies subject to privatization sued first UNMIK and then the UN in New York.