“In the course of describing my formative moment in 1978, I have already implicitly given my four basic rules for research. Let me now state them explicitly, then explain. Here are the rules:1. Listen to the Gentiles
2. Question the question
3. Dare to be silly
4. Simplify, simplify”
" How I Work http://web.mit.edu/krugman/www/howiwork.html", American Economist (1993)
How I Work (1993)
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Paul Krugman 106
American economist 1953Related quotes

Disme: the Art of Tenths, Or, Decimall Arithmetike (1608)
Source: The transformation of American industrial relations, 1986, p. 147

“Rule No. 1: Never lose money. Rule No. 2: Never forget rule No. 1.”
This maxim (perhaps of gambling or horse racing origin) is widely attributed to Warren Buffett and, as such, has traditionally been cited in print; notably, it was attributed (perhaps facetiously) to him by Mary Buffett in, The Tao of Warren Buffett. A more uncommon, less well known version, and perhaps one with a more lasting credibility (or certainly with a higher degree of checkability), would be: "The first rule is don't lose, and the second rule is never forget the first rule." This version was noted by Steve Forbes in a friendly meeting in Omaha, in an article published as: Jay-Z, Buffett and Forbes on Success and Giving Back. This article is available on the Forbes website, published on September 23, 2010.
Disputed
Variant: Rule No. 1: Never lose money. Rule No. 2: Never forget rule No. 1.

Source: Take The Risk (2008), p. 21
Source: 1910s, Ads and Sales (1911), p. 8

News conference (4 November 2004) http://www.washingtonpost.com/wp-dyn/articles/A27833-2004Nov5.html
2000s, 2004

6. Acknowledge mistakes. 7. Make the offer of friendship more than once. 8. Express curiosity about what the other is like.
Source: Raising the Peaceable Kingdom (2005), Ch. 5