Now I’ve published a number of editions of the PR Friendly Index it strikes me that I have enough data to look at changes over this period.
So, I thought it would be interesting to take a look at the metric that seems most accurately to determine position in the index – Technorati Authority – and see how the blogs in the index have fared recently.
I’ve looked at the blogs which have been in the index since its inception (and since I got the spreadsheets properly sorted), and which have remained at the same URL throughout, so that a fair picture can be drawn – quite literally.
The charts use the funky Google Chart API which I’ve used before but might use for future PR Friendly Indexes. They are independently scaled – so a blog with maximum authority of 100 can be drawn in the same space as one with 1000 – and show the absolute change. Blogs are ranked according to percentage change from the first score in November 2007 to the latest in August 2008, and this is what the figures in brackets show.
As with the PR Friendly Index, take a look at the data below first, then I’ll add more description below that (please note that sometimes the Google API flakes out and the charts don’t appear – I don’t think Google are a particularly happy set of bunnies right now):
So, the most improved blog is, I’m happy to say, Barbara Rozgonyi who has continued to climb throughout the entire period. Her latest authority score is 83 and, given that she started at 11, this means she’s approaching a 7x increase in authority over this period.
I know, I know, small changes to small figures give big percentages – just look at the annual report for any start-up to see such claims. In fact I’m bracing myself for claims and counter-claims as to the validity of this approach.
But there are some heavyweight blogs that have experienced substantial percentage decline. Again, there could be many reasons for this, not least quite simply the challenge of finding time to maintain a blog, perform professionally and have some sort of social life.
I also thought it might be interesting to look at the total authorities across all core blogs over this time:
|Nov 07||Dec 07||Jan 08||Feb 08||Jun 08||Aug 08|
Not looking too great really is it? Comparing August this year to November of last year, there has been a 27% decrease in Technorati Authority. The average change month-on-month has been a decline of 870 Authority points, which equates to an average month-on-month decline of 6 percentage points.
What does this tell us? On the face of it, that the PR blogosphere is shrinking. Or maybe our core bloggers are just finding it difficult to maintain attention when there are new blogs around (note how only about three-quarters of the index is included here because other bloggers have stopped, started or changed in this time, such as my own blog for example).
Or maybe the ‘blog equity’ is also experiencing something of a credit crunch as other services such as microblogging and aggregators such as Friendfeed come to the fore. Perhaps we’re all just producing more quality rather than quantity, in which case perhaps this is a good thing.
Oh, and since you ask, my chart looks like this – bearing in mind I ‘came out’ as Brendan Cooper instead of being Friendly Ghost and made my primary URL brendancooper.com around December last year:
What I find weird here is how I have many more subscribers now, but a declining authority. I even get fewer hits generally now than before. But that’s for another day…