Imagine an encyclopaedia updating its entries under Economics. Economics is a large field, changing all the time. To save time and avoid the risk of making an egregious error, the first port of call for the researchers working there is other encyclopaedias. Now, imagine that all the existing encyclopaedias did the same thing for all their entries. Over time they would drift away from the truth and all in the same direction. Ultimately, without the intervention of genuine, primary research,…