To the best of my recollection, I don't think such a study has been done across the country.
Having said that, this is a question of fairness. Two categories of journalists have been created in Canada: those who work for print media and those who work for electronic media.
As you know, companies that employ print journalists are entitled to a tax credit of 35%, up to a cap of, I think, about $85,000.
If for no other reason than fairness, this measure should be extended to the entire electronic media sector, whether radio or television.
To answer your question, no, the calculation hasn't been done.