Herman E. Daly and Joshua Farley, in Ecological Economics: Principles and Applications. (2003), page 234. quoted in Beyond GDP Measuring progress, true wealth, and the well-being of nations http://ec.europa.eu/environment/beyond_gdp/key_quotes_en.html, European Commission:Environment
“It is better to be roughly right than precisely wrong.”
Not attributed to Keynes until after his death. The original quote comes from Carveth Read and is:
It is better to be vaguely right than exactly wrong.
Logic, deductive and inductive (1898), p. 351 http://www.gutenberg.org/files/18440/18440-h/18440-h.htm#Page_351
Misattributed
Help us to complete the source, original and additional information
John Maynard Keynes 122
British economist 1883–1946Related quotes
The future of data analysis. Annals of Mathematical Statistics 33 (1), (1962), page 13.
Variant: "An approximate answer to the right question is worth a great deal more than a precise answer to the wrong question." "as the renowned statistician John Tukey once reportedly said," according to Super Freakonomics page 224.

“Perhaps it is better to be irresponsible and right, than to be responsible and wrong.”

“The right kind of leisure is better than the wrong kind of work.”
Más vale el buen ocio que el negocio.
Maxim 247
The Art of Worldly Wisdom (1647)

“Take no thought of who is right or wrong or who is better than. Be not for or against.”

“Accidents are not accidents but precise arrivals at the wrong right time.”
Being Late http://www.poetrysoup.com/famous/poem/21366/Being_Late
From the poems written in English

“It is far better for a man to go wrong in freedom than to go right in chains.”

“Sometimes it is better to lose and do the right thing than to win and do the wrong thing.”
Hansard http://www.publications.parliament.uk/pa/cm200506/cmhansrd/vo051109/debtext/51109-03.htm#51109-03_spmin10, House of Commons, 6th series, vol. 439, col. 302.
9 November 2005, responding to Charles Kennedy in the House of Commons during Prime Minister's Questions. Blair was referring to the likely defeat in Parliament of additional powers to detain terror suspects without charge, which happened later that day.
2000s

“To go wrong in one's own way is better than to go right in someone else's.”
Source: Crime and Punishment (Zločin a trest)