context: In 1999, she defended her PhD dissertation, titled State Regulation of the tax system, at the Kyiv National Economic University and received a Ph.D. in Economics.
source: Tymoshenko has worked as a practicing economist and academic.
reference_original: Tymoshenko trabalhou como economista e acadêmica.
reference_flipped: Tymoshenko trabalhou como economista e acadêmico.