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The following lecture notes were written shortly after I gave a course on capital theory in the winter-semester 1970/71 at the Univer­ sity of Heidelberg. While the general line of the argument is similar to the one in the course, I have modified and added a large number' of specific points in the process of writing the English version. I should like to emphasize the narrow limitations of the material covered in these notes. I have completely concentrated on steady states of stationary and exponentially growing economies, even up to the point where there is the danger of misleading the reader1 I have done this for several reasons. Other activities have not left me with a sufficient amount of time to be able to find the unifying principle of analysis and mode of presentation for the dynamic aspects of capi­ tal theory which would have made it worthwhile to add a sizeable book to the large body of literature in this field. On the other hand over the last couple of years I have become increasingly aware that some of the results in steady state capital theory (which could be derived without too much mathematical effort) are of relevance in present day dis­ cussions about the political role of economic theory and the relative merits of orthodox and radical economics. Also these results seemed not to be known by' mO$ of the participants in these discussions.

Capital --- 330.14 --- AA / International- internationaal --- 338.03 --- Kapitaal. Kapitaalbegrip. Kapitaaltheorie. Kapitaalwinst. Meerwaarde. Kapitaalallocatie. Kapitaalaccumulatie. Kapitaalconcentratie. Kapitaalvorming --- Kapitaal. --- Business & Economics --- Economic Theory --- 330.14 Kapitaal. Kapitaalbegrip. Kapitaaltheorie. Kapitaalwinst. Meerwaarde. Kapitaalallocatie. Kapitaalaccumulatie. Kapitaalconcentratie. Kapitaalvorming --- Saving and investment --- Production functions (Economic theory) --- Mathematical models --- Kapitaal --- Capital - Mathematical models --- Saving and investment - Mathematical models --- Economie mathematique --- Modeles mathematiques

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The economy of the 21st century in the OECD countries and in China, is characterized by a new phenomenon: the structural surplus of private savings in relation to private investment. This is true even in a situation of prosperity and very low interest rates. On the one hand, this excess saving is due to people's increasing inclination to save in light of rising life expectancy, driven by the desire to have sufficient assets in old age. On the other hand, the demand for capital is not increasing to the same extent, so that investment is not keeping pace with the rising desire to save. The resulting gap between the private desire for wealth and private investment can only be closed by increasing public debt. This open access book offers a new, capital-theoretical perspective on the macroeconomic relationship between desired wealth and investment, and it presents new empirical data on private wealth and its composition in the OECD plus China area. The authors argue that a free economic and social order can only be stabilized if the wealth aspirations of individuals are met under conditions of price stability. This is not possible without substantial net public debt. A new way of thinking about the economy as a whole is required. By way of an in-depth theoretical and empirical analysis, the book demonstrates this new way of thinking and describes the current challenges facing economic policy. It will appeal to economists and students of economics who are interested in macroeconomic theory and its economic policy implications. An impressive, and convincing theoretical dive into the fundamentals behind secular stagnation, with very strong implications for actual debt policy. Public debt may be needed to improve welfare. - Olivier Blanchard, Senior Fellow at the Peterson Institute for International Economics and Professor of Economics Emeritus at Massachusetts Institute of Technology (MIT). Chief Economist at the International Monetary Fund from 2008 to 2015. Saving and Investment in the Twenty-First Century gives a wholly new perspective on macroeconomics. (...) Weiz­säcker and Krämer describe a simple, practical solution to the underemployment that has plagued Southern Europe for more than a decade. - George Akerlof, Nobel Laureate in Economics, 2001. Professor at the McCourt School of Public Policy at Georgetown University and Professor of Economics Emeritus at the University of California, Berkeley. This is a profound and original contribution that can help us to understand and act on the great issues of our times. - Nicholas Stern, Grantham Research Institute on Climate Change and the Environment at the London School of Economics. Author of the Stern Review Report on the Economics of Climate Change. Chief Economist at the World Bank from 2000 to 2003.

Macroeconomics --- Political economy --- Public finance --- International economics --- Economic history --- Macroeconomics/Monetary Economics//Financial Economics --- Economic Policy --- Public Finance --- International Economics --- History of Economic Thought/Methodology --- Macroeconomics and Monetary Economics --- History of Economic Thought and Methodology --- Capital supply, capital demand --- Public debt --- Demography --- Neo-Austrian capital theory --- Keynesian economics --- Private savings --- Private investment --- Interest rates --- Open Access --- Monetary economics --- Public finance & taxation