Here is a definition of the word ‘science’
“1. the systematic observation of natural events and conditions in order to discover facts about them and to formulate laws and principles based on these facts. 2. the organized body of knowledge that is derived from such observations and that can be verified or tested by further investigation. 3. any specific branch of this general body of knowledge, such as biology, physics, geology, or astronomy.”
Academic Press Dictionary of Science & Technology [...]
Economics does nto [sic] fit the definition of science, in my opinion. So, scientific norms do not apply [when it comes to economics.]
McCloskey tracks the current use of ‘science’ back to 1867 (p. 20 in ‘The Rhetoric of Econmics,’ 2nd ed.). Earlier ‘science’ meant ‘studies,’ in line with its counterpart in other Indo-European languages. The weird thing is that today, its counterpart in most languages hasn’t really changed meaning; it means ‘systematic inquiry’ and is not explicitly chained to ‘natural events.’ It is thus used to describe, e.g., philosphy and studies of poetry and language, as well as physics and chemistry. It is thus absurd that economics is a science in other languages, but not in English. What are we supposed to make of this? I let McCloskey explain (p. 21).
The point is that the foreigners have gotten it right. [...] “Economics is a science” should not be the fighting words they are in English. The fighting lacks point because, as our friends across the water could have told us, nothing important depends on its outcome. Economics in particular is merely a disciplined inquiry into the market for rice or the scarcity of love. Economics is a collection of literary forms, some of them expressed in mathematics, not a Science. Indeed, science is a collection of literary forms, not a Science. And literary forms are scientific. [...] The idea that science is a way of talking, not a separate realm of Truth, has become common among students of science since Thomas Kuhn.[*]
So, what’s important is that economics is scientific. Economics might not be a science in the U.S., but it is certainly scientific and scientific norms do apply.
* Thomas Kuhn (1922 – 1996) was maybe the most influental philosopher of science in the twentieth century. Anyone slightly interested in science, philosophy or generally should read his book ‘The Structure of Scientific Revolutions.’