The New Palgrave Dictionary of Economics (2018), 3rd ed., is a twenty-volume reference work on economics published by Palgrave Macmillan. It contains around 3,000 entries, including many classic essays from the original Inglis Palgrave Dictionary, and a significant increase in new entries from the previous editions by the most prominent economists in the field, among them 36 winners of the Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel.  Articles are classified according to Journal of Economic Literature (JEL) classification codes. 
The New Palgrave is also available in a hyperlinked online version. Online content is added to the 2018 edition, and a 4th edition under the editorship of J. Barkley Rosser Jr., Esteban Pérez Caldentey, and Matías Vernengo will be published in the future. The first edition was titled The New Palgrave: A Dictionary of Economics (1987), was and edited by John Eatwell, Murray Milgate, and Peter Newman, as a way of recovering the legacy of Inglis Palgrave famous dictionary. It was published in four volumes, while the second edition was under the direction of Steven N. Durlauf and Lawrence E. Blume and was published in eight volumes.  Both are discussed in a section below.
Access to full-text articles (for all editions and post-2018 updates) are available online by subscription, whether of an organization, a person, or a person through an organization.  
The New Palgrave: A Dictionary of Economics (1987) is the title of the first New Palgrave edition. It is a four-volume reference edited by John Eatwell, Murray Milgate, and Peter Newman. It has 4,000 pages of entries, including 1,300 subject entries (with 4,000 cross-references), and 655 biographies. There were 927 contributors, including 13 Nobel Laureates in Economics at the time of first publication. It includes about 50 articles from Palgrave's Dictionary of Political Economy (1925–1927).  It was roughly twice the length of its predecessor and differed further in excluding most subjects not on economics or closely related to its practice.  It was developed as a modern version of the old Inglis Palgrave dictionary, with entries written by prominent economists for a highly specialized public.
Reviewing the 1987 edition for the New York Times , Robert M. Solow concluded that "this is a dictionary only in a very special sense. There are excellent survey articles, in various sizes, on various subjects. But the best of them are written by professionals for professionals." According to Solow, graduate students in economics would find the dictionary useful, but most of the articles would be inaccessible to non-economists, even undergraduate students of the liberal arts. For economists, however, the dictionary provided many excellent overviews of contemporary research.  In response, editor Milgate (1992) confirmed that the articles were written for an audience of professional economists, and so neither for the general reading public nor for specialist economists.
According to Milgate, New Palgrave downplayed mathematics, in comparison to leading economic journals. Only 24% of the columns contained "any mathematics" (and so required expensive hand-typesetting), while only 25% of the most recent issue of the American Economic Review (AER) in fact lacked mathematics, according to Milgate, who averred that the AER's mathematical usage was typical of leading contemporary journals: The New Palgrave's usage of mathematics was the reciprocal of the contemporary profession's. ( Milgate 1992 , p. 299) "It must be concluded that the New Palgrave actually under-represented the mathematical element in modern economics; and under-represented it to a significant degree", wrote Milgate (1992 , p. 300).
Commenting on contemporary economics, Solow described technical economics as its essential "infrastructure":
There is a lesson in the fate of Palgrave. Economics is no longer a fit conversation piece for ladies and gentlemen. It has become a technical subject. Like any technical subject it attracts some people who are more interested in the technique than the subject. That is too bad, but it may be inevitable. In any case, do not kid yourself: the technical core of economics is indispensable infrastructure for the political economy. That is why, if you consult Palgrave looking for enlightenment about the world today, you will be led to technical economics, or history, or nothing at all. 
More advanced mathematics was implicit in some of the articles, many of which were well written and reasonably accessible. Solow recommended the "broad and deep" article on game theory by Robert J. Aumann for well-equipped graduate students, along with John Harsanyi's article on bargaining theory. The articles on financial economics were "written by the best people—Stephen Ross, Robert Merton, and others—and they show it"; however, they were too difficult for the average investor. Complimenting the article on international trade, Solow added a caveat lector : "But God forbid that" a reader without knowledge of economics should try to understand protectionism, by consulting the New Palgrave. 
In his review, George Stigler commended the dictionary's non-technical and conceptually rich article on social choice, which was written by Kenneth Arrow, among "numerous" excellent articles. However, Stigler criticized the inclusion of "dozens" of articles in mathematical economics, which failed to provide intuitive introductions to the problem, how it was solved, and what the solution is: "These articles were written, not for a tolerably competent economist, but exclusively for fellow specialists." 
Whitaker wrote, "Readers to whom economics is nothing if not a science based on empirical inquiry may be dismayed by the lack of attention to empirical studies and factual matters". 
Stigler criticized the New Palgrave for largely ignoring empirical economics—economic data, summary statistics, and econometric investigations. According to Stigler, the empirical investigation of consumption and production functions has profoundly influenced microeconomic theory, while the empirical investigation of price levels has profoundly influenced monetary economics: The New Palgrave's neglect of empirical economics also weakened its treatment of economic theory and the history of economic thought. Furthermore, the editors failed to explain their neglect of empirical economics, while they gave large space to treatments of "technical economics", especially mathematical economics, and faddish topics, wrote Stigler. 
"The article on 'Profit and profit theory' does not contain a single number for what profits are or ever have been, in the United States or any other country, or any reference to any source that might provide such a number", wrote Herbert Stein, who complained "There are articles about elasticities of this or that but no estimate of the elasticity of anything." 
Reviewing the critics of the over-emphasis on theoretical and "doctrinal" economics, editor Milgate admitted that the New Palgrave was flawed by its neglect of empirical economics. 
Robert M. Solow criticized the 1987 edition for slighting mainstream economics by giving excessive space to the "dissenting fringes within academic economics", namely Marxist economics as well as "Austrian persuasion", Post-Keynesians, and neo-Ricardian. 
Nevertheless, there is usually a definite consensus—there is one now—and an accurate picture of the discipline would make that clear. It would have to give dissent a fair shake. It would have to treat mainstream ideas critically. But it should keep the various "paradigms" in proportion. I do not think The New Palgrave has managed to do that.
The most obvious, though not the most important, manifestation of imbalance is the large number of items devoted to Marxist themes, from "abstract and concrete labor" to "vulgar economy." Some of the articles are informative, some are mystifying; but that is not the point. Marx was an important and influential thinker, and Marxism has been a doctrine with intellectual and practical influence. The fact is, however, that most serious English-speaking economists regard Marxist economics as an irrelevant dead end. The New Palgrave does not take up the issue head on, but I think it gives a false impression of the state of play by this deadpan statement. It is rather as if a medical dictionary were to intersperse articles on mainstream orthopedics, written by orthopedists, with articles on osteopathy, written by osteopaths, and were to leave it at that. 
The 1987 dictionary's discussion of heterodox approaches was also criticized by George Stigler, who complained that these articles were written by sympathetic editors in a partisan manner:
The selection of sympathetic writers ... is in fact a general practice in Palgrave II. Israel Kirzner's essay on the Austrian economists does not hint at the existence of error, misrepresentation of critics, or tasteless attacks upon the German Historical School, and Klaus Henning did little better with Böhm-Bawerk. An ersatz Austrian is apparently more loyal than the genuine article.  [Italics added]
Stigler complained about the extensive and biased articles on Marxist economics, including "neo-Ricardian" economists (who follow Piero Sraffa): "A nonprofessional reader would never guess from these volumes that economists working in the Marxian-Sraffian tradition represent a small minority of modern economists, and that their writings have virtually no impact upon the professional work of most economists in major English-language universities." Stigler provided a table of articles that were biased by Marxist orthodoxy and criticized some authors by name, especially a "violently pro-Marxist" entry by C. B. Macpherson. 
The General Editors were Steven N. Durlauf and Lawrence E. Blume.  It added considerably on the previous edition, and maintained the general conception of the dictionary as written for advanced specialists. The list of Nobel laureates increased to 25, and the number of volumes also doubled. Perhaps as a result of already being an established institution there were a considerably smaller number of reviews. Declan Trott argued that the Dictionary is not properly a dictionary or an encyclopedia and that the quality and depth of the entries are very uneven, comparing it with Wikipedia as a source for information on economics. 
R. H. Inglis Palgrave's Dictionary of Political Economy (1894–1899), 3 v., was the forerunner of The New Palgrave. The initial contractual agreement between Palgrave and the publisher Macmillan & Co. is dated 1888. Serial installments in 1891–92 had disappointing sales. An appendix was added to Volume III in 1908, so completing publication of the set. The Dictionary was wide-ranging and sometimes idiosyncratic. It included for example a comprehensive treatment of laws on property and commercial transactions. Professional reaction has been described as generally favorable and unsurprising, "given that almost all economists of any repute had already endorsed the enterprise by agreeing to contribute."  Nearly thirty years after the first volume appeared, Palgrave's Dictionary of Political Economy (1923–1926), edited by Henry Higgs, appeared with Palgrave's name added to the title but few changes in structure or contents. 
Economics is the social science that studies the production, distribution, and consumption of goods and services.
Kenneth Joseph Arrow was an American economist, mathematician, writer, and political theorist. He was the joint winner of the Nobel Memorial Prize in Economic Sciences with John Hicks in 1972.
Sir Roy George Douglas Allen, CBE, FBA was an English economist, mathematician and statistician, also member of the International Statistical Institute.
John Leonard Eatwell, Baron Eatwell, is a British economist who was President of Queens' College, Cambridge, from 1996 to 2020. A former senior advisor to the Labour Party, Lord Eatwell sat in the House of Lords as a non-affiliated peer from 2014 to 2020, before returning to the Labour bench.
In social sciences, especially economics, a stylized fact is a simplified presentation of an empirical finding. Stylized facts are broad tendencies that aim to summarize the data, offering essential truths while ignoring individual details.
Jean-Jacques Marcel Laffont was a French economist specializing in public economics and information economics. Educated at the University of Toulouse and the Ecole Nationale de la Statistique et de l'Administration Economique (ENSAE) in Paris, he was awarded PhD in economics by Harvard University in 1975.
Heterodox economics is any economic thought or theory that contrasts with orthodox schools of economic thought, or that may be beyond neoclassical economics. These include institutional, evolutionary, feminist, social, post-Keynesian, ecological, Austrian, complexity, Marxian, socialist, and anarchist economics.
Helen Makower was a British economist. She was the daughter of the writer and music critic Stanley Makower. Graduating from Newnham College, Cambridge (M.A. Oxon, inc. awarded 1938, and with a Ph.D. in Economics 1937, she joined Jacob Marschak's Oxford Institute of Statistics before serving in Frederick Lindemann's S-Branch, Sir Winston Churchill's private economics and statistics service, during World War II. After the war, she served briefly with the British Control Commission in Germany and later with the United Nations, before returning to academia and the London School of Economics, where she retired as a Reader in 1977. Makower was at the forefront of the statistical turn in the British economics of the 1930s, and remained an influential figure after the war, acting as an important link between the mathematical economics developed at the Cowles Commission and British economics.
Lawrence E. Blume is the Distinguished Arts and Sciences Professor of Economics and Professor of Information Science at Cornell University, US.
John Duffy is an American economist. He is a professor of economics at the University of California, Irvine.
Peter Kenneth Newman was an English economist and historian of economic thought. He helped to edit The New Palgrave: A Dictionary of Economics, to which he contributed several articles.
Mathematical economics is the application of mathematical methods to represent theories and analyze problems in economics. Often, these applied methods are beyond simple geometry, and may include differential and integral calculus, difference and differential equations, matrix algebra, mathematical programming, or other computational methods. Proponents of this approach claim that it allows the formulation of theoretical relationships with rigor, generality, and simplicity.
Demographic economics or population economics is the application of economic analysis to demography, the study of human populations, including size, growth, density, distribution, and vital statistics.
Macroeconomic theory has its origins in the study of business cycles and monetary theory. In general, early theorists believed monetary factors could not affect real factors such as real output. John Maynard Keynes attacked some of these "classical" theories and produced a general theory that described the whole economy in terms of aggregates rather than individual, microeconomic parts. Attempting to explain unemployment and recessions, he noticed the tendency for people and businesses to hoard cash and avoid investment during a recession. He argued that this invalidated the assumptions of classical economists who thought that markets always clear, leaving no surplus of goods and no willing labor left idle.
Murray Milgate, is an Australian-born academic economist and Sometime Fellow and director of studies in economics at Queens' College in the University of Cambridge, where he is now a Life Fellow. He is the co-creator and co-editor of the celebrated original edition of The New Palgrave Dictionary of Economics (1987) together with John Eatwell and Peter Newman.
In economics, non-convexity refers to violations of the convexity assumptions of elementary economics. Basic economics textbooks concentrate on consumers with convex preferences and convex budget sets and on producers with convex production sets; for convex models, the predicted economic behavior is well understood. When convexity assumptions are violated, then many of the good properties of competitive markets need not hold: Thus, non-convexity is associated with market failures, where supply and demand differ or where market equilibria can be inefficient. Non-convex economies are studied with nonsmooth analysis, which is a generalization of convex analysis.
Convexity is an important topic in economics. In the Arrow–Debreu model of general economic equilibrium, agents have convex budget sets and convex preferences: At equilibrium prices, the budget hyperplane supports the best attainable indifference curve. The profit function is the convex conjugate of the cost function. Convex analysis is the standard tool for analyzing textbook economics. Non‑convex phenomena in economics have been studied with nonsmooth analysis, which generalizes convex analysis.
Shannon C. Stimson is an American political theorist and historian of ideas, whose more recent work and teaching spans the economic and political thought of the early modern period through the nineteenth century. She is the Thomas and Dorothy Leavey Chair in the Government department at Georgetown University. Her academic posts have included appointments at Harvard University (1984-1991), UC Berkeley (1991-2014), the Fulbright Professorship in the United Kingdom, the Christensen Fellowship of St. Catherine's College, Oxford, the John K. Castle Chair in Ethics, Politics and Economics at Yale University and she has been a Distinguished Academic Visitor at Queens' College, Cambridge on two occasions. Her research has been supported through fellowships from the Mellon Foundation, the National Endowment for the Humanities, the American Association of University Women, as well as by several prize fellowships. Her articles have appeared in numerous edited volumes, journals of political thought, economics, the history of economic thought, and political science in America and Europe. She has served on the editorial boards of the American Political Science Review, the Adam Smith Review, and the Journal of Politics.
Stefano Zamagni is an Italian economist. Born in Rimini, Zamagni is Professor of Economics at the University of Bologna. Zamagni is also a fellow of the Human Development and Capability Association and President of the Pontifical Academy of Social Sciences.
Kevin W. S. Roberts was the Sir John Hicks Professor of Economics at the University of Oxford until his retirement in 2020.