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: Тимошенко работала практикующим экономистом и академиком.
reference_flipped: Тимошенко работал практикующим экономистом и академиком.