Polling. BC public opinion polls. Always a fascinating topic.
The 2009 BC election was the last election whereby CATI methodology was utilized by pollsters - the "gold standard". CATI - live telephone interviews (landline/cell). CATI has always been virtually bang-on with their results.
To wit, Nanos (CATI) has nailed all last 5 federal elections - even nailed the BC federal election results with their small sub-sample in 2011 and 2015. The BC Libs internally used CATI during the 2013 election and their CATI internals (both provincially and riding level) were also bang-on - predicted 48 seats on Friday (4 days before 2013 e-day - actually won 49) and nailed the province-wide voting result.
The 2013 BC election was the first election that CATI methodology was not utilized by public pollsters. Why? Although CATI is reliable and accurate... it is also very expensive. Ergo, 2 new polling methodologies were introduced during the 2013 election campaign - opt-in online panel and IVR (robo), which are very cheap to produce but also highly inaccurate.
Basically, for the first time ever, the 2013 BC election campaign only had opt-in online and IVR public pollsters. All of these pollsters/methodologies confirmed a major BC NDP win at the end of the 2013 campaign. Fooled everyone.
Now heading into the 2017 writ period... we are also witnessing the same 2 polling methodologies utilized as in 2013 - opt-in online panel and IVR. No CATI polling.
2017 polling methodologies to date/pollsters:
1. IVR (robo) polling methodology - Mainstreet Research/Forum Research. The last Mainstreet Research poll, released yesterday, had a 4% BC NDP lead (albeit with a high 25% undecided rate)
To put things into context, Ekos (IVR pollster) released several opinion polls during the 2013 BC campaign. At the start of the 2013 campaign, Ekos held that the BC NDP led by 17%:
Quote:
EKOS POLITICS
BC NDP VICTORY ALL BUT CERTAIN
April 12, 2013
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http://www.ekospolitics.com/wp-content/uploads/full_report_bc_april_12_2013.pdf
By the end of the 2013 campaign, Ekos held that the BC NDP had a 6% lead:
Quote:
EKOS POLITICS
TIGHTENING BC RACE SEES NDP WITH NARROW BUT
SIGNIFICANT LEAD WITH LIKELY VOTERS
May 13, 2013
|
http://www.ekospolitics.com/wp-content/uploads/full_report_bc_may_13_2013.pdf
As an aside, the BC Green Party has hired Ekos as their internal pollster... ergo they will not be releasing public IVR/robo polls. Mainstreet Research/Forum Research will be releasing public IVR polls in 2017.
2. Opt-in online polling methodology - Insights West - the last IW poll released this past week held that the BC NDP led by 2%. Ipsos - the last Ipsos poll released this past week held that the BC NDP leads by 5%. To put things into context, Ipsos released several opinion polls during the 2013 BC campaign. At the start of the 2013 campaign, Ipsos held that the BC NDP led by 19%:
Quote:
NDP Start BC Campaign with 19 Point Lead
NDP (48%, down 3) and BC Liberals (29%, down 3) Lose Support to BC Conservatives (11%, up 2) and Green Party (9%, up 2)
Approval Ratings Unchanged for Christy Clark (30%, no change) and Adrian Dix (51%, no change)
Dix (36%, down 1) Continues to Lead Clark (23%, no change) as Best Premier
Tuesday, April 16, 2013
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http://www.ipsos-na.com/news-polls/pressrelease.aspx?id=6067
By the end of the 2013 campaign, Ipsos held that the BC NDP had an 8% lead:
Quote:
BC NDP Lead By 8 Points As Campaign Ends
NDP (45%, up 2) Lead BC Liberals (37%, unchanged) by 8 Points
Green Party (9%, down 1) and BC Conservatives (6%, down 1) Both Down Single Point
Adrian Dix (34%, up 3) and Christy Clark (33%, down 1) Tied as Best Premier
Tuesday, May 14, 2013
|
http://www.ipsos-na.com/news-polls/pressrelease.aspx?id=6113
Aside from the foregoing, we may have one CATI pollster this election.
Back in August, 2016, Innovative Research, CATI pollster, released their first ever "public" BC polling results. Shortly thereafter, Mainstreet Research (IVR) also released BC polling results. Both results were completely different - IR held that the BC Libs led by 9%, while Mainstreet Research held that the BC NDP led by 5%.
That's a 14% differential/reversal, which also mirrors the 10% - 13% differential/reversal at the end of the 2013 BC election campaign between opt-in online panel/IVR pollsters and the actual election results.
Now who is Innovative Research? Been around for ~15 years and the principle is Greg Lyle who is from BC and understands how to poll BC. Are their CATI polls accurate? Well, last fall both Nanos (CATI) and IR released provincial ON polls and they basically mirrored each others results. Nanos also nailed the previous ON provincial election as well as the 5 past federal elections..
Innovative Research will apparently be releasing new BC CATI numbers soon and personally that firm will be the only one that I will rely on in terms of accuracy. I always prefer both reliability and accuracy.
Even then, while accurate, poll numbers only represent a snapshot in time. Right now most of the electorate is only beginning to pay attention to the campaign. Only half-way through the writ period, during and after the televised leaders debate, is when the electorate typically becomes engaged.
Only during the final 7 - 10 days, do polling numbers begin to solidify and where polling shifts become extant.