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The benefits of crowdsourcing are well-recognized today for an increasingly broad range of problems. Meanwhile, the rapid development of social media makes it possible to seek the wisdom of a crowd of targeted users. However, it is not trivial to implement the crowdsourcing platform on social media, ...

We often care about people's degrees of belief about certain events: e.g. causality between an action and the outcomes, odds distribution among the outcome of a horse race and so on. It is well recognized that the best form to elicit opinion from human is probability distribution instead of simple v ...