Through aggregation, the fuzzy evaluation indexes of each alternative of decision-makers are determined with the method of index of optimism, which are aggregated into group's in…

The World Bank rightly warns of the potential dangers of efforts to convert such indicators into league tables, but it is being too modest-the benefits far exceed the risks.

Overhauling its search results ranking system, so that they are not solely determined by how much advertisers have paid, and are primarily ranked by credibility.