“By the time it comes to interpretation of the substantive conclusions, the assumptions on which the model has been based are easily forgotten. But it is precisely the empirical validity of these assumptions on which the usefulness of the entire exercise depends… A natural Darwinian feedback operating through selection of academic personnel contributes greatly to the perpetuation of this state of affairs.”

—  Wassily Leontief

Source: "Theoretical assumptions and nonobserved facts," 1971, p. 3.

Adopted from Wikiquote. Last update June 3, 2021. History

Help us to complete the source, original and additional information

Do you have more details about the quote "By the time it comes to interpretation of the substantive conclusions, the assumptions on which the model has been base…" by Wassily Leontief?
Wassily Leontief photo
Wassily Leontief 10
Russian economist 1906–1999

Related quotes

“There are here two assumptions about 'evaluations ', which I will call assumption (1) and assumption (2). Assumption (1) is that some individual may, without logical error, base his beliefs about matters of value entirely on premises which no one else would recognise as giving any evidence at all. Assumption (2) is that, given the kind of statement which other people regard as evidence for an evaluative conclusion, he may refuse to draw the conclusion because this does not count as evidence for him.”

Philippa Foot (1920–2010) British philosopher

"Moral Beliefs"

Edward Fredkin photo

“Under the roof of one controversial assumption about physics, we discuss five big questions that can be addressed using concepts from a modern understanding of digital informational processes. The assumption is called finite nature. The digital mechanics model is obtained by applying the assumption to physics. The questions are as follows: 1. What is the origin of spin? 2. Why are there symmetries and CPT (charge conjugation, parity, and time reversal)? 3. What is the origin of length? 4. What does a process model of motion tell us? 5. Can the finite nature assumption account for the efficacy of quantum mechanics?”

Edward Fredkin (1934) American physicist and computer scientist, a pioneer of digital physics

Five big questions with pretty simple answers, IBM Journal of Research and Development, 48, 1, January 2004, 31–45 https://ieeexplore.ieee.org/abstract/document/5388918/,

Frank P. Ramsey photo

“It is worth pausing for a moment to consider how far our conclusions are affected by considerations which our simplifying assumptions have forced us to neglect.”

Frank P. Ramsey (1903–1930) British mathematician, philosopher

"A Mathematical Theory of Saving", The Economic Journal, Vol. 38, No. 152 (Dec., 1928)

“The use of "nurture" as a synonym for "environment" is based on the assumption that what influences children's development, apart from their genes, is the way their parents bring them up. I call this the nurture assumption. Only after rearing two children of my own and coauthoring three editions of a college textbook on child development did I begin to question this assumption. Only recently did I come to the conclusion that it is wrong.”

Judith Rich Harris book The Nurture Assumption

The Nurture Assumption, chapter 1, p. 2. http://books.google.com/books?id=-uKBJRMJBjcC&printsec=frontcover#v=onepage&q=%22nurture%22%20as%20a%20synonym%20for%20%22environment%22&f=false http://www.nytimes.com/books/first/h/harris-nurture.html

Jiddu Krishnamurti photo

“Meditation is a state of mind in which the operation and exercise of will is not.”

Jiddu Krishnamurti (1895–1986) Indian spiritual philosopher

3rd Public Talk, Bangalore, India (13 January 1973)
1970s

Lynda Gratton photo

“Two of the most widely adopted models of human resource management are the hard and soft versions. These are based on opposing views of human nature and managerial control strategies. The hard model is based on notions of tight strategic control, and an economic model of man according to Theory X, while the soft model is based on control through commitment and Theory Y. We argue that because these assumptions are so divergent, they cannot both properly be incorporated within a single model of human resource management.”

Lynda Gratton (1953) Business theorist

Catherine Truss, Lynda Gratton, Veronica Hope-Hailey, Patrick McGovern and Philip Stiles (1997). "Soft and hard models of human resource management: a reappraisal." Journal of Management Studies, 34(1), 53-73.

George Soros photo

“First, there is no single sustainable model for national success. Second, the American model, which has indeed been successful, is not available to others, because our success depends greatly on our dominant position at the center of the global capitalist system, and we are not willing to yield it.”

George Soros (1930) Hungarian-American business magnate, investor, and philanthropist

"The Bubble of American Supremacy" in The Atlantic Monthly (December 2003), p. 63 - 66 http://www.globalpolicy.org/empire/analysis/2003/12supremacy.htm
Context: The supremacist ideology of the Bush Administration stands in opposition to the principles of an open society, which recognize that people have different views and that nobody is in possession of the ultimate truth. The supremacist ideology postulates that just because we are stronger than others, we know better and have right on our side. The very first sentence of the September 2002 National Security Strategy (the President's annual laying out to Congress of the country's security objectives) reads, "The great struggles of the twentieth century between liberty and totalitarianism ended with a decisive victory for the forces of freedom and a single sustainable model for national success: freedom, democracy, and free enterprise."
The assumptions behind this statement are false on two counts. First, there is no single sustainable model for national success. Second, the American model, which has indeed been successful, is not available to others, because our success depends greatly on our dominant position at the center of the global capitalist system, and we are not willing to yield it.

“It is a common fallacy to believe that the law of large numbers acts as a force endowed with memory seeking to return to the original state, and many wrong conclusions have been drawn from this assumption.”

William Feller (1906–1970) Croatian-American mathematician

Source: An Introduction To Probability Theory And Its Applications (Third Edition), Chapter V, Conditional Probability, Stochastic Independence, p. 136.

“If the assumptions are wrong, the conclusions aren't likely to be very good.”

Robert E. Machol (1917–1998) American systems engineer

Cited in: Norman Pascoe (2011) Reliability Technology: Principles and Practice of Failure Prevention in Electronic Systems. Ch. 5
Principles of Operations Research (1975)

Werner Erhard photo

“Most of our notions about the world come from a set of assumptions which we take for granted, and which, for the most part, we don't examine or question. We bring these assumptions to the table with us as a given. They are so much a part of who we are that it is difficult for us to separate ourselves from them enough to be able to talk about them. We do not think these assumptions, we think from them.”

Werner Erhard (1935) Critical Thinker and Author

Source: Article, "Breaking Out of the Box -A Crash Course in Paradigm Thinking" Debra Feinstein, BENCHMARK Magazine, FALL 1989 p.3

Related topics