# Mathiness in the Theory of Economic Growth† By Paul M. Romer* *Stern School of Business, New York University, 44 W. 4th St, New York, NY 10012 (e-mail: promer@stern.nyu. edu). An appendix with supporting materials is available from the author’s website, paulromer.net, and from the web-site for this article. Support for this work was provided by

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But — without showing the model assumptions to be realistic and relevant, that kind of economics indeed, as Romer puts it, produces nothing but “blah blah blah.” 2015-06-17 Mathiness is a term coined by Paul Romer to label a specific misuse of mathematics in economic analyses. An author committed to the norms of science should use mathematical reasoning to clarify his analyses. By contrast, "mathiness" is not intended to clarify, but instead to mislead. Downloadable!

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If the participants in a discussion are committed to science, mathematical theory can encourage a unique clarity and precision in both reasoning and communication. Mathiness in the Theory of Economic Growth By PAUL M. ROMER∗ Politicsdoesnotleadtoabroadlysharedcon-sensus. Ithastoyieldadecisionwhetherornota consensus prevails. As a result, political institu-tions create incentives for participants to exag-gerate disagreements between factions.

## 1998, Aghion, and Howitt 2006, Aghion and Durlauf 2007; Romer 1994, 2014, among others). Romer, P. (2014) Mathiness in the theory of economic growth.

"At a symposium on the state of economics held in 1986, Paul Romer is upset about the technical rigor of those political assumptions. If the function Lucas and Moll (2014) used allowed you to exchange the order of the limits everything apparently would have been fine!

### This is not the first time that Romer has called out people in the economics profession for views that differ from his own. He did it in the 2015 American Economic Review Papers and Proceedings with an article titled “Mathiness in the Theory of Economic Growth.” In that piece, Romer doesn’t call for drumming people out of the profession.

The thesis is called "Mathiness and lying" and discusses the consept of mathiness as introduced by Paul Romer.

‘Mathiness’ is a term introduced by Paul Romer in his paper “Mathiness in the Theory of Economic Growth”. It is referring to a phenomenon in the research area of economic growth; where it is common for researchers to add mathematical material into their published works, in a way that is not scientifically sound. Mathiness is a term coined by Paul Romer to label a specific misuse of mathematics in economic analyses. An author committed to the norms of science should use mathematical reasoning to clarify his analyses. By contrast, mathiness is not intended to clarify, but instead to mislead. According to Romer, some researchers use unrealistic assumptions and strained interpretations of their results in
Paul Romer writes that mathiness is a critique of a style that lets economists draw invalid inferences from the assumptions and structure of a model; a style that authors can use to persuade the reader (and themselves) to adopt conclusions that do not follow by the rules of logic; a style that tolerates wishful thinking instead of precise, clearly articulated reasoning. Paul Romer, shown in 2011, wrote, "Mathiness in the Theory of Economic Growth." A Democratic U.S. presidential candidate has pledged to grow the economy by spending hundreds of billions of dollars
Romer kallade fenomenet för ”mathiness”, och poängterade att det riskerar att underminera seriösa forskare.

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Romer wants economists to use maths with “clarity, precision and rigour”.

(See also this blog post). Mathiness lets academic politics masquerade as science. Like mathematical theory, mathiness uses a mixture of words and symbols, but instead of making tight
14 Mar 2020 be summarized broadly as diverse sorts of “mathiness” (Romer 2015).

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### 2015-05-20 · Systematic isn't a word one can use to describe Romer’s mathiness paper. He only cites a handful of examples, and his main complaints seem to be with two economists, Edward Prescott and Robert

The market for mathematical theory can survive a few lemon articles filled with mathiness. Romer here is not saying that theory should be entertainment but instead that it has become entertainment. This is the notion of mathiness.

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### For months, Paul Romer, the economics professor, has been on a crusade against what he calls “mathiness”, by which he means deliberately abstruse use of

Jg. (2015), H. 5, S. 89-93.