The online edition of the Financial Time in German recalls that after the unexpected resignation of her predecessor Ivo Sanader in July 2009, Kosor became the premier and the president of the ruling Croatian Democratic Union (HDZ). Six month later, she thwarted Sanader's attempt to come back and evicted him from the party without hesitation.
Many party colleagues, suspected of corruption, had to go away, which has made the 57-year-old Kosor popular among young Croats.
The newspaper praises Kosor for having introduced a new tone in the cooperation in the Balkans that has so far been marked by macho-nationalists.
"She brought the border dispute with Slovenia to an end and improved the cooperation with the Hague Tribunal," the paper said.
The paper, however, reports, that Kosor's great popularity at the beginning of her premiership has waned with the economic crisis and downturn and Croatia's growing unemployment and debt.
According to the daily, the prospective completion of Croatia's European Union accession negotiations would be the beginning of Kosor's toughest test rather than the crown of her political career.
Later this year, Kosor will be faced with the parliamentary elections which the paper describe as tough. On the other hand, a referendum on Croatia's entry into the EU should be held with the pro-EU support fluctuating around 50 percent.