Looks like a interesting but difficult project. From the article:

> The question then is to what extent the content of Twitter is representative of voting behaviour and how accurately we can predict the results of an election with Twitter data.

Some demographics (young? city?) are overrepresented than others (old? farms?). In some cases, it's cool to vote publically for a party, so the people is more eager to say it publically or directly lie in the tweets. In other cases, people is afraid to say publically that they will vote for a party ...

I think you will need many magical constants that are not available until you have 3 or 4 previous elections to fit the data.

Can you make a prediction for each province / state?

Good look, and post the progress and predictions before the election, and a post-mortem analysis after.

For nearly a century it was only possible to find out what the general public thinks with traditional polling, which costs thousands or even millions of dollars/euros. Since the rise of Web 2.0 Social Media analytics has been increasingly popular. A lot has been said about the predictive power of Twitter so far. According to some people you should be able to predict flu epidemics, unemployment and even riots/revolutions. What about Elections?

I have tried to predict the outcome of Turkish General elections of 1 November 2015 using Twitter data and I believe I will be able to predict quiete accurately. Within a few percent.

yes this looks interesting. It seems quite difficult to capture all the relevant terms in order to extract the holy formula within the boundaries of the twitter stuff. but if you can predict the election within a confidence bound of up to 7.43% I would say you have done a tremendous job and lives can be saved.