The phrase "allegedly favourable" is correct and usable in written English.
It can be used when discussing something that is claimed or reported to be positive or beneficial, but without definitive proof.
Example: "The study's results were allegedly favourable, suggesting that the new treatment could improve patient outcomes."
Alternatives: "reportedly positive" or "supposedly advantageous."
After losing millions, Mr Arnault sold out of Phillips, though he still owns L'Etude Tajan, the biggest French auction house.Over the past few years the two men seemed to have agreed on a truce in the luxury-goods business, though LVMH continues its litigation against Morgan Stanley, an American investment bank, over its allegedly favourable treatment of PPR.
James Johnson allegedly received favourable treatment from a mortgage company while he headed Fannie Mae, a government-sponsored agency that was a big customer of the company in question.
The Indian-born Gupta family has been accused of corrupt dealings with Zuma, allegedly benefiting from favourable government contracts and mining deals.
After it was revealed that aides had swapped dozens of calls with the director of a TV channel, allegedly pressing for favourable coverage, the aides offered contradictory stories, and Mr Toledo's press secretary resigned.Several of Mr Toledo's recent appointments have been unwise.
She allegedly raped her spouse to obtain "favourable evidence" which she planned to use in divorce proceedings, according to prosecutors.
Matters came to a head following the parliamentary elections of 1957, which allegedly were manipulated to produce a parliament favourable to the reelection of Chamoun.
One of the country's most senior judges, Gabriela Birsan, is under investigation for allegedly accepting bribes in exchange for issuing favourable verdicts.Almost half of Romanians tell pollsters they believe the economic crisis will last for more than three years.
Both Grayson and Quinn are allegedly involved in the ethics scandal that triggered #GamerGate (Grayson was accused of giving Quinn favourable coverage due to the pair's relationship but has never reviewed her games) but the mob's choice of target reinforces the criticism that participants are simply "dedicated misogynists".
Over the past year, Russia has seen an unprecedented rise in the activity of "Kremlin trolls" - bloggers allegedly paid by the state to criticise Ukraine and the West on social media and post favourable comments about the leadership in Moscow.
Mr. Obama allegedly does not.
