The results has been filter on Authors containing Henri Wallard. ANA has found 1 results for you, in
Currently showing results 1 to 1.
Didn’t find what you were looking for? Try the Advanced Search!
Opinion polls and electoral polls were subject to intense scrutiny and criticism in the wake of the 2016 experience, followed by renewed confidence in the first months of 2017. Polling firms are facing up to the current challenges and reports of the...