5. Pictures of Knowledge Development and Dissemination
With the advent of efficient search engines the search cost for readers is much reduced. Thus in fields where the journal will not be able to anticipate the selection criteria of its readers it is sensible not to prematurely select the content but to delay the selection process right up to the time the reader access the information. In this case it is better to `tag' papers with judgmental information in a form that search engines can utilise and allow readers to choose the selection criteria themselves rather than attempt to do the selection on behalf of a disparate set of readers prematurely. Previously the cost of implementing such a delayed search was prohibitive and this is why the journal system was appropriate, now with the shift in the cost structure this delayed selection is not only possible by fairly easy to implement.
Of course, if a journal is in the happy position of being able to anticipate its readers selection criteria with a high degree of faithfulness, then the (now minimal) search cost they save its readers may justify its existence. I think that for many journals this is not be the case, and that in the future the search cost saved will diminish as compared to the flexibility of review.
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