Earlier this week, we looked at the
share in hours of each media company in the largest markets in
Canada. Using those same share totals, we can figure out how
concentrated or competitive the Canadian radio markets are.
In each city or market, the
shares of all media companies, not the stations themselves, like
Astral, Bell, CBC, Corus, and Rogers are added. One would expect the
result to be 100%. However, this isn't the case since
community/campus radio stations don't participate in the studies and
neither do ones from other markets that happen to be picked up. (As a
reminder, the share is calculated by taking the the number of hours
tuned to a particular station, or in this case the media company, and
dividing it by the total number of hours listened to the radio.) So,
the problem with using the share values from the BBM data is that we
also have to include the other radio stations that help sum all the
shares to 100% and we don't have that information.
