It was inevitable, given the conceptual and empirical content of development economics in the mid 1970s, that the early World Development Reports painted with a broad brush.
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wide paintbrush (crude lines, versus "fine" brush)– TimRCommented Jul 25, 2016 at 12:19
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1Here is an explanation: idioms.thefreedictionary.com/paint+with+a+broad+brush– JavaLatteCommented Jul 25, 2016 at 12:20
2 Answers
paint with a broad brush is an idiomatic expression. The sentence simply says that the early World Development Reports regarded things in general terms without getting deeply into the specifics.
Look here for the details (it has got some very good examples under the quotations section). Here's specifically the part of interest:
paint with a broad brush
(idiomatic) To describe a class of objects or a kind of phenomenon in general terms, without specific details and without attention to individual variations.
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Guess what, I was in the process of editing the answer while you down-voted it. Commented Jul 25, 2016 at 20:40
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@AlanCarmack - Was there a request for the meaning of the expression" paint with a broad brush" or for the meaning of the adjective "broad" in collocation with the noun "brush"? Can't the latter be looked up in a dictionary to provide a definition in the answer? Commented Aug 25, 2016 at 0:10
The idiom having been explained, here's the picture of a broad paintbrush for, as TRomano mentioned, painting crude lines:
To see why it is broad, here's the picture of a fine (thin in thickness) one for painting small details: