That is relatively easy with survey evidence, harder in the case of individuals. (blog.politics.ox.ac.uk)
The British Election Study survey evidence suggests that Scottish Labour MPs will not be saved by incumbency effects or tactical voting, so the party will primarily need to attract a significant number of their former voters back from the SNP. (britishelectionstudy.com)
Evaluating the Public Health Responsibility Deal for Alcohol surveys the evidence on the Government's flagship public health programme, which was launched in 2011 as a voluntary partnership with commercial organisations, public bodies, academics and NGOs to promote public health goals. (politics.co.uk)