“When the rate of return on capital exceeds the rate of growth of output and income, as it did in the nineteenth century and seems quite likely to do again in the twenty-first, capitalism automatically generates arbitrary and unsustainable inequalities that radically undermine the meritocratic values on which democratic societies are based.”

— Thomas Piketty, book Capital in the Twenty-First Century

Source: Capital in the Twenty-First Century (2013), p. 1.

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Thomas Piketty24

French economist 1971

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“I can now present the first fundamental law of capitalism, which links the capital stock to the flow of income from capital. The capital/income ratio β is related in a simple way to the share of income from capital in national income, denoted α. The formula is
α = r × β
Where r is the rate of return on capital.
For example, if β=600% and r = 5%, then α = r × β = 30%.
In other words, if national wealth represents the equivalent of six years of national income, and the rate of return on capital is 5 percent per year, then capital’s share in national income is 30 percent.”

Thomas Piketty book Capital in the Twenty-First Century

Source: Capital in the Twenty-First Century (2013), p. 52.

“Whenever the rate of return on capital is significantly and durably higher than the growth rate of the economy, it is all but inevitable that inheritance (of fortunes accumulated in the past) predominates over saving (wealth accumulated in the present). … The inequality r > g in one sense implies that the past tends to devour the future: wealth originating in the past automatically grows more rapidly, even without labor, than wealth stemming from work, which can be saved. Almost inevitably, this tends to give lasting disproportionate importance to inequalities created in the past, and therefore to inheritance.”

Thomas Piketty book Capital in the Twenty-First Century

Source: Capital in the Twenty-First Century (2013), p. 377.

“The rate of investment – the speed at which investors wish to increase the capital stock – should be related, if to anything, to q, the value of capital relative to its replacement cost.”

James Tobin (1918–2002) American economist

Source: "A general equilibrium approach to monetary theory" (1969), p. 21 as cited in: Sılvio Rendon, "Non-Tobin’s q in Tests for Financial Constraints," 2009

“Some argue that an income tax is unfair because it taxes capital income twice: once when the original income is earned, and again when the investment produces a return.”

Harvey S. Rosen (1949) American economist

Source: Public Finance - International Edition - Sixth Edition, Chapter 19, Taxes on Consumption and Wealth, p. 453

“Although it is obvious that people acquire useful skills and knowledge, it is not obvious that these skills and knowledge are a form of capital, that this capital is in substantial part a product of deliberate investment, that it has grown in Western societies at a much faster rate than conventional (nonhuman) capital, and that this growth may well be the most distinctive feature of the economic system.”

Theodore Schultz (1902–1998) American economist

Source: "Investment in human capital," 1961, p. 1

“In the absence of more consumers, capital finds ways to get existing consumers to consume more. Indeed, the dominant story for the past few hundred years: the growth rate of material use has always significantly outstripped the growth rate of the population.”

Jason Hickel (1982) author

Less is More: How Degrowth Will Save the World (2021)
Source: Rise of the Juggernaut, pp. 111-112

“First, most of the speculation about the superiority of the communist system - including the popular view that Western economies could painlessly accelerate their own growth by borrowing some aspects of that system - was off base. Rapid Soviet economic growth was based entirely on one attribute: the willingness to save, to sacrifice current consumption for the sake of future production. The communist example offered no hint of a free lunch.
Second, the economic analysis of communist countries' growth implied some future limits to their industrial expansion - in other words, implied that a naive projection of their past growth rates into the future was likely to greatly overstate their real prospects. Economic growth that is based on expansion of inputs, rather than on growth in output per unit of input, is inevitably subject to diminishing returns. It was simply not possible for the Soviet economies to sustain the rates of growth of labor force participation, average education levels, and above all the physical capital stock that had prevailed in previous years. Communist growth would predictably slow down, perhaps drastically.”

Paul Krugman (1953) American economist

Pop Internationalism (1996), Asia's Miracle (1994)

“You could say that GDP (National Income) and prosperity and wealth grows fastest when income tax rates are highest. And wealth slows, the economy slows, when taxes are cut. That's counter intuitive but if you look at any chart comparing tax rates and economic growth rates that's what you find. The 19th century knew it, the 18th century knew it but today you have a kind of counter revolution of junk economics that is basically anti-labor economics.”

Michael Hudson (economist) (1939) American economist

"Higher Taxes on Top 1% Equals Higher Productivity", Video Interview (13:28), The Real News Network (TRNN) http://therealnews.com/t2/index.php?option=com_content&task=view&id=31&Itemid=74&jumival=6000 (January 1, 2011)

“Low-end disruption occurs when the rate at which products improve exceeds the rate at which customers can adopt the new performance.”

Clayton M. Christensen (1952–2020) Mormon academic

Christensen cited in: Philip Kotler, John A. Caslione (2009) Chaotics: The Business of Managing and Marketing in the Age of Turbulence. p. 23
2000s

“When the rate of change outside exceeds the rate of change inside, the end is in sight.”

Jack Welch (1935) American executive: General Electric CEO

Variant: If the rate of change on the outside exceeds the rate of change on the inside, the end is near.

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