Wikipedia

Is Wikipedia a reliable source for studying Macroeconomics and other branches of Economy? I'm in a college, and i find many things i learn from books very hard to understand. That said, i regularly endeavor to find other explanations online. I know there are numerous sites offering a myriad of information about economy, but none are well systematized as wikipedia. If you don't think wiki is a reliable source for economic studies, could you point out to any other (well systematized) web sites that i could use? Thanks very much.
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