# 16 May 2015 "Mathiness" is his term for when people (allegedly) use math in a sloppy way, to support their preferred theories. Romer warns direly that the

Economist Paul Romer (2015) coined the term 'mathiness' to denote an improper use of mathematics to veil or obfuscate normative or ideological stances. The

Mathiness in the Theory of. av RE LUCAS Jr · 2009 · Citerat av 380 — Paul M. Romer, Mathiness in the Theory of Economic Growth, American Economic Review, 10.1257/aer.p20151066, 105, 5, (89-93), (2015). av forskningen om romer i Sverige : Ett uppdrag från Delegationen för romska Mathiness and lying: Mathiness in the context of philosophical theories of Mathiness and lying: Mathiness in the context of philosophical theories of deception2020Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hp Paul Romer har närmast ursinnigt sågat denna uppfattning. Han kallar det mathiness, en sorts mattesoppa, där det är oklart vad som är empiriskt fastlagt och Mathiness and lying: Mathiness in the context of philosophical theories of deception2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE 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 Flera ledande ekonomer, exempelvis Paul Romer och Paul Krugman, har gått ut och Denna slappa användning har getts det nedlåtande namnet ”mathiness”.

Yeah, we got attacked in a seminar for using these integrals and are figuring out the best defence apart from Acemoglu and Romer do it. I think you are missing what Romer means by mathiness. It's about clouding illogical statements with maths, not making simplifying assumptions. That fact that these are far from harmless is a different issue. Romer seems to be upset that Boldrin and Levine are calling this "perfect competition". Which is sort of right, because it's not. It's limit pricing.

"Mathiness"-as Romer (2015) put it recently-is a trend when economic science has become colonized by sometimes uncontrolled mathematics.

## Appendix: Mathiness in the Theory of Economic Growth by Paul Romer This appendix exists as both a Mathematica notebook called Mathiness Appendix.nb and as two different pdf print-outs. The notebook is a combination of statements intended to communicate with people and statements that communicate with the computational engine in Mathematica.

It is to use better maths. Orwell wanted language to be short, simple, active and direct. Romer wants economists to use maths with “clarity, precision and rigour”.

### 3. T/F: Romer thinks that errors in mathematical arguments are examples of mathiness. 4. T/F: Romer says that the economists he has accused of mathiness are using it to promote a right-wing political agenda designed to influence national politics. 5. T/F: Romer thinks that economists should use less math. 6. T/F: Romer is angry.

In "Protecting the Norms of Science in Economics", Paul Romer writes: About math: I have studied physics as an undergraduate. I’ve seen clear evidence that math can facilitate scientific progress toward the truth.

‘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.

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T/F: Romer says that the economists he has accused of mathiness are using it to promote a right-wing political agenda designed to influence national politics. 5.

I think Noah Smith misunderstands Paul Romer. As I see it, Paul Romer believes that George Stigler laid down the methodological principal that one should always assume perfect competition in […]
Paul Romer inquired why I did not endorse his following Krusell and Smith (2014) in characterizing Piketty and Piketty and Zucman as a canonical example of what Romer calls “mathiness”. Indeed, I think that, instead, it is Krusell and Smith (2014) that suffers from “mathiness”–people not in control of their models deploying algebra untethered to…
Two nice quotes from Paul Romer about his paper Mathiness in the Theory of Economic Growth The alternative to science is academic politics, where persistent disagreement is encouraged as a way to create distinctive sub-group identities. The usual way to protect a scientific discussion from the factionalism of academic politics is to exclude people who […]
Paul Romer says: "No model can have a competitive equilibrium with price-taking behavior and partially excludable nonrival goods.

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### Mathiness in the Theory of Economic Growth by Paul M. Romer. Published in volume 105, issue 5, pages 89-93 of American Economic Review, May 2015, Abstract: Mathiness lets academic politics masquerade as science. Like mathematical theory, mathiness uses a mixture of words and symbols, but instead of

Spekulationerna om att Romer skulle få priset späddes förmodligen på av att hans Klicka för att komma åt Mathiness.pdf av H Lind · Citerat av 1 — Romer, P M (2015), ”Mathiness in the Theo- ry of Economic Growth”, American Economic. Review, Papers & Proceedings, vol 105, s 89–93. Samuelson, P A Paul Romer, »Mathiness in the Theory of Economic Growth«, i The American Economic. Review volym 105, nr 5 (2015), s. 89–93. 5.

## 3. T/F: Romer thinks that errors in mathematical arguments are examples of mathiness. 4. T/F: Romer says that the economists he has accused of mathiness are using it to promote a right-wing political agenda designed to influence national politics. 5. T/F: Romer thinks that economists should use less math. 6. T/F: Romer is angry.

[1] 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.

What researchers he cites are doing, Romer argues, is dressing up an idea they want to convey in mathematics and presenting that as a logical theoretical insight. 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! Unfortunately, it turns out that Romer's takedown of Lucas and Moll is the true mathiness. "Mathiness"-as Romer (2015) put it recently-is a trend when economic science has become colonized by sometimes uncontrolled mathematics. "At a symposium on the state of economics held in 1986, Paul Romer’s critique of modern growth theory, though important, errs in holding Joan Robinson as an early proponent of flawed methodological practices which he believes affects economics even today. This note argues that Robinson’s work on aggregate Mathematics Versus Mathiness.