Thomas Piketty: Income

“National income is defined as the sum of all income available to the residents of a given country in a given year, regardless of the legal classification of that income.”

Thomas Piketty book Capital in the Twenty-First Century

Source: Capital in the Twenty-First Century (2013), p. 43.

Country

“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.

“How do wealth-income and capital-output ratios evolve in the long run, and why? Until recently it was difficult to properly address this question, for one simple reason: national accounts were mostly about ﬂows, not stocks. Economists had at their disposal a large body of historical series on ﬂows of output, income and consumption – but limited data on stocks of assets and liabilities. When needed, for example for growth accounting exercises, estimates of capital stocks were typically obtained by cumulating past ﬂows of saving and investment. This is ﬁne for some purposes, but severely limits the set of questions one can ask.”

Thomas Piketty

Piketty, Thomas, and Gabriel Zucman. Capital is back: Wealth-income ratios in rich countries, 1700-2010 http://piketty.pse.ens.fr/files/PikettyZucman2013WP.pdf. Centre for Economic Policy Research, 2013.

Exercises , Question , Past , Wealth

“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.

Law , Way , Wealth

“The distribution of wealth is one of today’s most widely discussed and controversial issues. But what do we really know about its evolution over the long term? Do the dynamics of private capital accumulation inevitably lead to the concentration of wealth in ever fewer hands, as Karl Marx believed in the nineteenth century? Or do the balancing forces of growth, competition, and technological progress lead in later stages of development to reduced inequality and greater harmony among the classes, as Simon Kuznets thought in the twentieth century? What do we really know about how wealth and income have evolved since the eighteenth century, and what lessons can we derive from that knowledge for the century now under way?”

Thomas Piketty book Capital in the Twenty-First Century

Source: Capital in the Twenty-First Century (2013), p. 1 Introduction: Lead paragraph; Quoted in From the Introduction to Capital in the Twenty-First Century, by Thomas Piketty http://www.hup.harvard.edu/features/capital-in-the-twenty-first-century-introduction.html, at hup.harvard.edu, 2014.

Way , Knowledge , Wealth

“I am trying to put the distributional question and the study of long-run trends back at the heart of economic analysis. In that sense, I am pursuing a tradition which was pioneered by the economists of the 19th century, including David Ricardo and Karl Marx. One key difference is that I have a lot more historical data. With the help of Tony Atkinson, Emmanuel Saez, Facundo Alvaredo, Gilles Postel-Vinay, Jean-Laurent Rosenthal, Gabriel Zucman and many other scholars, we have been able to collect a unique set of data covering three centuries and over 20 countries. This is by far the most extensive database available in regard to the historical evolution of income and wealth. This book proposes an interpretative synthesis based upon this collective data collection project.”

Thomas Piketty

Eduardo Porter, " Q&A: Thomas Piketty on the Wealth Divide http://economix.blogs.nytimes.com/2014/03/11/qa-thomas-piketty-on-the-wealth-divide/?_php=true&_type=blogs&_r=0," economix.blogs.nytimes.com, March 11, 2014.
In answer of the question: "Your book fits oddly into the canon of contemporary economics. It focuses not on growth and its determinants, but on how the spoils of growth are divided. In that sense, it reminds us of similar concerns in a book of similar title written 150 years ago: Karl Marx’s “Capital.” What parallels would you draw between the two?"

Books , Question , Sense , Study