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Mark Gerard Hayes
Mark Gerard Hayes
Mark Gerard Hayes
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Mark Gerard Hayes, pen-name M. G. Hayes (21 September 1956 - 15 December 2019),[1] was a British-Irish economist and former banker. As an economist, he wrote mainly on the economics of John Maynard Keynes and on the economic implications of Catholic social thought. He was a Quondam Fellow in Economics of Robinson College, Cambridge,[2] and published two books on the economics of Keynes and several scholarly articles and chapters on both his areas of research. From 2006-2016 he was the Secretary of the Post-Keynesian Economics Society (PKES, formerly known as PKSG).[3]

Key Information

Earlier in his career, he was the principal founder and first Managing Director from 1990-1999 of Shared Interest, the British co-operative society that provides a large part of the finance behind the global Fair Trade movement.[4][5]

Biography

[edit]

Educated at Stonyhurst College and Clare College, Cambridge, where he read Economics, Mark Hayes began his working career as a banker (1978-1988) with the Industrial and Commercial Finance Corporation that became 3i in 1984. He left 3i in 1988 to become the principal founder and first Managing Director (1990-1999) of Shared Interest.[6] After a brief period in 2001-2002 at Triodos Bank as UK Managing Director,[7] he switched to an academic career, earning his doctorate at the University of Sunderland in 2003 under the external supervision of Malcolm Sawyer, University of Leeds.

From 2003-2006 he was a visiting fellow at Northumbria University, during which time he wrote his first book The Economics of Keynes: A New Guide to The General Theory. He won the Helen Potter Award[8] from the Association for Social Economics in 2006 for "the best article in the Review of Social Economy by a promising scholar of social economics", 'On the efficiency of Fair Trade'.[9]

In 2006 he became a Fellow of Robinson College, Cambridge and its Director of Studies in Economics from 2009-2014. He was also a Trustee and Senior Research Fellow of Homerton College, Cambridge from 2006-2009 and an Affiliated Lecturer in the Faculty of Economics, University of Cambridge from 2013-2015. In 2014, he moved to Durham University to become the inaugural holder of the St Hilda Chair in Catholic Social Thought and Practice in Durham's Centre for Catholic Studies, before early retirement in 2016.[10] His second book on Keynes is John Maynard Keynes: The Art of Choosing the Right Model,[11] published shortly before his death.

Publications

[edit]

Books

[edit]
  • John Maynard Keynes: The Art of Choosing the Right Model (Polity Press; 2019) ISBN 978 1 50952 825 7 [1]
  • The Capital Finance of Co-operative and Community Benefit Societies (Co-operatives UK; 2013) [2]
  • The Economics of Keynes: A New Guide to The General Theory (Edward Elgar Publishing Ltd; 2006) ISBN 978 1 84720 082 2 [3] [4]
  • Investment and finance under fundamental uncertainty (Ph.D dissertation, University of Sunderland; 2003) [5]

Papers and articles

[edit]
  • 2018. The liquidity of money, Cambridge Journal of Economics, 42 (5), 1205-1218
  • 2018. Sraffa's prices of production understood in terms of Keynes's state of short-term expectation, in The General Theory and Keynes for the 21st Century, Dow, Sheila Jespersen, Jesper & Tily, Geoff (eds), Edward Elgar.
  • 2018. Creation and Creativity, in Theology and Ecology Across the Disciplines: On Care for Our Common Home, Celia Deane-Drummond and Rebecca Artinian-Kaiser (eds), Bloomsbury
  • 2017. Keynes's liquidity preference and the usury doctrine: their connection and continuing policy relevance, Review of Social Economy, 75 (4): 400-416
  • 2013. The Vatican and the international monetary system, Review of Social Economy, 71 (3), 390-98
  • 2013. The state of short-term expectation, Review of Political Economy, 25 (2), 205–24
  • 2013. Ingham and Keynes on the Nature of Money, in Financial Crises and the Nature of Capitalist Money, Geoff Harcourt and Jocelyn Pixley (eds), Palgrave Macmillan
  • 2013 (with Olivier Allain and Jochen Hartwig). Effective Demand: Securing the Foundations - A Symposium, Review of Political Economy, 25 (4), 650-78
  • 2012. The General Theory: A Neglected Work?!, in Keynes’s General Theory For Today, Jesper Jespersen and Mogens Ove Madsen (eds), Edward Elgar
  • 2012. The Efficient Markets Hypothesis, in The Elgar Companion to Post Keynesian Economics, J. E. King (ed.), Edward Elgar
  • 2012. Keynes: The Neglected Theorist, in Keynes’ General Theory: 75 Years Later, Thomas Cate (ed.), Edward Elgar
  • 2010. The Loanable Funds fallacy: saving, finance and equilibrium, Cambridge Journal of Economics, 34 (4), 807–20
  • 2010. The fault line between Keynes and the Cambridge Keynesians: a review essay, Review of Political Economy, 22 (1), 151-60
  • 2010. Mutual Enmity: deposit insurance and economic democracy, Review of Social Economy, 68 (3), 365-70
  • 2009. The Post Keynesian alternative to inflation targeting (with Angel Asensio), European Journal of Economics and Economic Policies, 6 (1), 65-79
  • 2008. Keynes’s Z function: a reply to Hartwig and Brady, Cambridge Journal of Economics, 32 (5), 811–14
  • 2008. Keynes’s degree of competition, European Journal of the History of Economic Thought, 15 (2), 275–91
  • 2008. “Fighting the Tide: Alternative Trade Organizations in the Era of Global Free Trade” – A Comment, World Development, 36 (12), 2953–61
  • 2007. The point of effective demand, Review of Political Economy, 19 (1), 55–80
  • 2007. Keynes’s Z function, heterogeneous output and marginal productivity, Cambridge Journal of Economics, 31 (5), 741-53
  • 2006. Value and probability, Journal of Post Keynesian Economics, 28 (3), 527–38
  • 2006. On the efficiency of Fair Trade, Review of Social Economy, 64 (4), 447–68
  • 2006. Lucas on involuntary unemployment, Cambridge Journal of Economics, 30 (3), 473–7
  • 2006. Financial Bubbles, in A Handbook of Alternative Monetary Economics, Philip Arestis and Malcolm Sawyer (eds), Edward Elgar
  • 1993. Shared Interest and Co-operation, Journal of Co-operative Studies, 76, 39-43

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Mark Gerard Hayes

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from Grokipedia
Mark Gerard Hayes (21 September 1956 – 15 December 2019) was a British-Irish economist and former banker renowned for his rigorous interpretations of John Maynard Keynes's theories, emphasizing monetary economics and the limitations of neoclassical models. Hayes's academic career included roles such as Director of Studies in Economics at Robinson College, University of Cambridge, where he contributed to post-Keynesian scholarship by critiquing mainstream interpretations that overlooked Keynes's focus on uncertainty and liquidity preference. His major publications, including The Economics of Keynes: A New Guide to The General Theory (2006) and John Maynard Keynes: The Art of Choosing the Right Model (2020), provided detailed textual analyses arguing that Keynes advocated context-specific modeling over universal equilibria, influencing debates on fiscal policy and economic instability. Prior to academia, Hayes worked in banking, drawing on practical experience to underscore Keynes's insights into financial markets' inherent volatility. Colleagues regarded him as one of the foremost modern interpreters of Keynes, bridging historical exegesis with policy-relevant analysis amid persistent misreadings of The General Theory.

Early Life and Education

Birth and Upbringing

Mark Gerard Hayes was born on 21 September 1956 in Toronto, Canada, to Irish parents Angela (née McGrath) and Tom Hayes, a chartered engineer working there at the time. His British-Irish nationality reflected his heritage and later life in the UK.

Academic Training

Hayes attended Stonyhurst College, a Jesuit independent school in Lancashire, England, for his secondary education. He subsequently studied economics at Clare College, University of Cambridge, obtaining a bachelor's degree. Following a decade in banking, Hayes returned to academia to pursue doctoral studies, earning a PhD from the University of Sunderland in 2003 with a dissertation on Investment and Finance Under Fundamental Uncertainty, which applied critical realist methodology to corporate finance decisions amid uncertainty.

Professional Career

Banking Roles

Hayes began his professional career in investment banking, joining the Industrial and Commercial Finance Corporation (ICFC), a government-backed venture capital provider that rebranded as 3i Group plc in 1984. He served as an investment manager at 3i, where he contributed to financing small and medium-sized enterprises, before departing. In 1990, Hayes founded Shared Interest Society Limited, a cooperative financial institution specializing in trade finance for fair trade importers and producers, and assumed the role of its first managing director, which he held until 1998. Under his leadership, the society raised initial share capital of £400,000 by the end of its launch year and expanded to support ethical lending amid growing demand for alternative finance models. Hayes later took on a senior role at Triodos Bank UK, an ethical bank focused on sustainable investments, serving as a director for entities including Triodos Investments Limited and Triodos Match Limited from October 2001 to February 2002, listed in official records with the occupation of banker. His tenure there was brief, aligning with his ongoing interest in mission-driven finance, though he departed after several months. These roles reflected Hayes' early emphasis on integrating financial services with social and ethical objectives, predating his shift to academic economics.

Transition to Academia

After serving as managing director of Shared Interest from 1990 to 1998—a financial cooperative he founded to provide credit to fair trade producers in developing countries—Hayes handed over the directorship in 1998 to pursue a career in academia. This shift was driven by his interest in documenting the practical ethical finance models he had developed and advancing unconventional economic theories through scholarly work. Hayes enrolled in a PhD program at the University of Sunderland shortly thereafter, completing his doctorate before taking up a position as a visiting fellow at the University of Northumbria, where he wrote his first book on Keynesian economics. This academic entry allowed him to formalize his longstanding engagement with macroeconomic ideas, initially explored during his undergraduate studies at Clare College, Cambridge, and practical finance roles, into rigorous research and teaching. By 2006, he had advanced to a fellowship at Robinson College, Cambridge, solidifying his transition from financial practitioner to economist.

Key Academic Positions

Hayes held several positions at the University of Cambridge, where he taught economics at the Faculty of Economics and affiliated colleges. He served as Director of Studies in Economics at Robinson College from 2009 to 2014, during which time he also acted as a Fellow there. From 2013 to 2015, he was an Affiliated Lecturer in the Faculty of Economics. Earlier, Hayes was Senior Research Fellow in Economics at Homerton College. In 2014, Hayes transitioned to Durham University, where he held a professorial chair in the Department of Theology and Religion as the inaugural occupant of the St. Hilda Chair, reflecting his interdisciplinary interests in economics and theology. These roles underscored his focus on post-Keynesian economics while engaging broader philosophical and ethical dimensions.

Scholarly Contributions

Interpretation of Keynes' Economics

Mark Gerard Hayes interpreted John Maynard Keynes's The General Theory of Employment, Interest and Money (1936) as a sophisticated Marshallian theory extending competitive equilibrium analysis from the firm and industry levels to the economy as a whole, rather than a radical break from classical economics. In this framework, Keynes's aggregate supply and demand functions served as analytical tools for short-run macroeconomic relationships, with classical theory applicable only as a special case under full employment conditions. Hayes argued that this Marshallian lens preserved Keynes's emphasis on market competition while highlighting deviations from full employment equilibrium due to monetary factors and uncertainty. Central to Hayes's reading was Keynes's identity as a "principally monetary economist," where money fundamentally alters capitalist dynamics beyond a neutral medium of exchange or store of value in barter-like models. He contended that in a money-using economy, saving functions as a hedge against an uncertain future, detached from specific intertemporal consumption plans, leading to aggregate outcomes where investment determines savings via the multiplier effect on income and employment. This contrasted with neoclassical views treating money as peripheral; for Hayes's Keynes, monetary institutions and liquidity preference drive effective demand, rendering supply-side adjustments insufficient without demand stimulus. Hayes delineated a causal structure rooted in expectations under uncertainty, categorizing them into short-term (employer production decisions), medium-term (dealer marketing), and long-term (investor capital commitments), which do not converge on a single equilibrium but fragment economic coordination. Even imperfect expectations propel action, with causation flowing from subjective forecasts to aggregate variables like output and employment, challenging classical assumptions of automatic full-employment clearance. He critiqued reductions of Keynes to "corn model" simplifications, insisting the General Theory modeled a complex, institutionally embedded monetary system where demand influences both short- and long-run outcomes. In policy terms, Hayes's interpretation prioritized full employment as the criterion for economic success, advocating fiscal and monetary interventions to manage aggregate demand while retaining Marshallian competitive foundations. This approach distinguished him from more heterodox post-Keynesians favoring Kaleckian or Sraffian frameworks, positioning his as a "profoundly Marshallian" reclamation of Keynes against neoclassical dilutions. His works, including The Economics of Keynes (2006) and John Maynard Keynes (2020), applied this to contemporary issues like eurozone design and trade imbalances, underscoring Keynes's enduring relevance for demand-led stabilization.

Emphasis on Monetary and Causal Realism

Hayes interpreted Keynes' General Theory as a theory of competitive equilibrium in a monetary production economy, where money is inherently non-neutral and integral to causal processes rather than a veil over real exchanges. He argued that classical economics erroneously assumes money's neutrality, leading to unrealistic models that ignore how liquidity preference and interest rates directly influence investment, output, and employment levels. In Hayes' view, this monetary emphasis reveals Keynes' departure from barter-based abstractions toward a realistic depiction of capitalist economies, where monetary institutions shape production decisions and economic stability. Central to Hayes' analysis was a causal framework starting from the state of short-term expectation, which he positioned as the primary driver of investment and aggregate demand, eschewing neoclassical reliance on long-run full-employment equilibrium. This approach, outlined in his five propositions on Keynes' theory—covering equilibrium, competition, money, expectation, and liquidity—highlights how uncertain future prospects generate realistic causal chains: expectations inform liquidity choices, which set interest rates, influencing entrepreneurial decisions and overall economic activity. Hayes contended that such sequencing captures the inherent instability of monetary economies, where causation flows from subjective animal spirits to objective outcomes, rather than from supply-side adjustments assumed in classical models. By privileging these elements, Hayes sought to restore Keynes' original intent against post-war syntheses that diluted the monetary and expectational realism. He maintained that true Keynesianism requires recognizing money's active role in perpetuating unemployment through deficient demand, informed by empirical observation of interwar conditions rather than axiomatic deductions. This perspective informed his critiques of equilibrium-centric interpretations, advocating instead for policy attuned to managing expectations and liquidity to achieve causal stability.

Integration with Theological Perspectives

Hayes examined the alignment between Keynesian monetary economics and Catholic social teaching, particularly through the lens of historical theological critiques of usury. In medieval scholastic doctrine, rooted in scriptural interpretations such as Exodus 22:25 and Luke 6:35, usury—defined as any interest on loans—was prohibited to uphold principles of justice, charity, and the common good, preventing exploitation of the vulnerable. Hayes highlighted John Maynard Keynes's favorable assessment of this tradition in his 1930 Treatise on Money, where Keynes praised the scholastics for recognizing money's conventional nature and the need for ethical restraints on its use, contrasting it with classical economics' laissez-faire approach. This integration positioned Keynesian policy prescriptions, such as active monetary management to maintain low interest rates and full employment, as compatible with Catholic emphases on human dignity and equitable distribution. Hayes argued that Keynes's advocacy for central bank control over long-term interest rates echoed scholastic concerns by subordinating finance to productive ends rather than allowing it to dominate society, thereby mitigating the social harms of debt burdens critiqued in papal encyclicals like Rerum Novarum (1891). He drew explicit parallels to Pope Francis's Evangelii Gaudium (2013), which condemns financial systems that exacerbate inequality, suggesting Keynesian tools could operationalize theological calls for solidarity and subsidiarity in modern economies. As St Hilda Professor of Catholic Social Thought and Practice at Durham University from 2014 to 2016, Hayes applied these insights to broader theological discourse, contending that causal realism in Keynes's framework—emphasizing money's non-neutral role in causation—supported Catholic realism about economic structures' impact on moral agency. Unlike neoclassical models assuming self-equilibrating markets, Hayes viewed Keynesian analysis as affirming the need for prudential intervention to foster conditions where individuals could exercise virtues like temperance in consumption and justice in exchange, aligning with Thomistic natural law ethics. His work thus bridged empirical economic reasoning with theological anthropology, prioritizing human flourishing over utilitarian aggregates.

Publications

Major Books

Hayes's principal monograph, The Economics of Keynes: A New Guide to The General Theory, was published in 2006 by Edward Elgar Publishing. The book presents a chapter-by-chapter exposition of John Maynard Keynes's The General Theory of Employment, Interest and Money (1936), emphasizing its monetary foundations and rejecting neoclassical interpretations that prioritize real over monetary factors. Hayes argues that Keynes's framework hinges on causal realism, where money's non-neutrality drives economic outcomes, and critiques misreadings that abstract from historical time and uncertainty. In 2020, Hayes published John Maynard Keynes: The Art of Choosing the Right Model with Polity Press. This concise volume, written in accessible prose with minimal mathematics, elucidates Keynes's methodological pluralism, advocating model selection based on the problem at hand—such as liquidity preference for monetary economies versus marginal efficiency of capital for investment decisions. Hayes integrates Keynes's policy insights, including advocacy for full employment through fiscal measures and reforms in corporate governance to counter power imbalances, positioning the work as a primer for applying Keynesian analysis to contemporary issues like inequality and instability. The book was published posthumously following Hayes's death in December 2019.

Selected Papers and Articles

Hayes contributed several peer-reviewed articles elucidating the monetary foundations of Keynesian economics, emphasizing liquidity preference and the endogeneity of money. In "The Liquidity of Money" (2018), published in the Cambridge Journal of Economics, he argued that money's essential properties derive from its role as a unit of account and store of value in uncertain environments, challenging exogenous money supply models prevalent in mainstream macroeconomics. This paper built on Keynes's Treatise on Money to critique neoclassical assumptions of barter-like exchange. Another key article, "Keynes’s liquidity preference and the usury doctrine: their connection and continuing policy relevance" (2017), appeared in the Review of Social Economy. Hayes linked Keynes's liquidity preference theory to medieval Christian prohibitions on usury, positing that excessive interest rates distort investment by prioritizing liquidity over productive circulation, with implications for contemporary debt-based financial systems. He drew on historical theological sources to support causal mechanisms where high liquidity preference exacerbates economic stagnation. In "The State of Short-term Expectation" (2013), from the Review of Political Economy, Hayes examined Keynes's Chapter 12 analysis in The General Theory, contending that animal spirits and conventional judgment form the unstable psychological basis for aggregate investment, rendering equilibrium models inadequate without accounting for radical uncertainty. This work underscored his broader interpretive framework of Keynes as a monetary production economist. Hayes also addressed microeconomic underpinnings in "Keynes's degree of competition" (2008), published in the European Journal of the History of Economic Thought. He reconstructed Keynes's assumptions of imperfect competition in labor markets, arguing that The General Theory relies on price- and wage-setting behaviors rather than perfect competition, countering interpretations that dilute Keynes's departure from classical theory. Empirical references to interwar British industry supported his textual exegesis. Further integrating policy critique, "The loanable funds fallacy: saving, finance and equilibrium" (2010) in the Cambridge Journal of Economics dismantled the orthodox saving-investment identity, asserting that bank credit creation drives effective demand independently of prior savings, with historical data from the Great Depression illustrating disequilibrium dynamics. This paper reinforced Hayes's causal realism in monetary circuit models. On theological intersections, "The Vatican and the International Monetary System" (2013), in the Review of Social Economy, analyzed papal encyclicals alongside Keynesian insights, advocating reserve asset reforms to mitigate global imbalances, while noting institutional biases in IMF governance favoring creditor nations. Hayes cited specific Vatican documents from Centesimus Annus (1991) to ground ethical critiques.

Reception and Legacy

Academic Influence and Praise

Hayes exerted influence primarily within post-Keynesian and heterodox economics communities through his interpretive scholarship on Keynes, serving as secretary of the Post-Keynesian Economics Society from 2006 to 2016, a role that involved organizing conferences and advancing the society's objectives. His teaching at the University of Cambridge's Faculty of Economics and colleges such as Robinson and Homerton shaped generations of students in Keynesian monetary theory, with colleagues noting his dedication to rigorous, text-based analysis of The General Theory. His 2006 book The Economics of Keynes: A New Guide to the General Theory received praise for resolving longstanding interpretive puzzles and serving as an accessible "travel guide" to Keynes' framework, emphasizing its monetary and causal dimensions over neoclassical distortions. Reviews in journals like the Review of Keynesian Economics and Journal of the History of Economic Thought commended its innovations in clarifying Keynes' probabilistic and evolutionary approach. Similarly, his 2020 monograph John Maynard Keynes: The Art of Choosing the Right Model, published posthumously, was lauded for distilling Keynes' model selection methodology into a concise analytical biography, highlighting economics as a science of adaptive thinking amid uncertainty. Prominent post-Keynesian economist G. C. Harcourt's obituary underscored Hayes' enduring contributions to preserving a Marshallian-Keynesian synthesis, positioning him as one of the tradition's final exemplars. While mainstream citation metrics remain modest, reflecting the marginalization of heterodox views, his work garnered respect for its fidelity to primary texts and critique of bastardized Keynesianism.

Criticisms and Debates

Hayes' emphasis on a Marshallian interpretation of Keynes, which prioritizes the original General Theory over the neoclassical synthesis, has sparked debates within heterodox economics, particularly contrasting with New Keynesian views that frame Keynesian fluctuations as temporary deviations from long-run classical equilibrium due to price and wage rigidities. Hayes rejected this as a dilution of Keynes' radical challenge to equilibrium assumptions, insisting instead that aggregate demand influences both short- and long-run outcomes in a monetary production economy. A notable exchange occurred in 2006 when Hayes critiqued Pedro Garcia Duarte's analysis of Robert Lucas' treatment of involuntary unemployment, arguing that new classical models fail to capture Keynes' concept of unemployment arising from deficient aggregate demand rather than individual search frictions. Duarte replied in 2008, defending the distinction between Keynesian involuntary unemployment—defined by unmet conditions for employment at prevailing wages—and Lucasian disequilibrium, while accusing Hayes of conflating definitional and substantive critiques of classical theory. This debate underscored broader tensions over applying microfoundations to macroeconomic concepts like expectations and unemployment. Within post-Keynesian circles, Hayes' eclectic stance—drawing on figures like Paul Davidson and Victoria Chick while diverging from Sraffa-Kalecki influences that emphasized classical surplus approaches—drew implicit critique for not fully aligning with dominant strands that prioritized distributional conflicts over Marshallian supply-demand frameworks. Reviewers noted Hayes' relative optimism about contemporary institutions, such as inflation-targeting regimes, embodying Keynesian elements like cheap money, but questioned this assessment given institutional inertia rooted in classical paradigms and inadequate crisis responses, as evidenced by post-2007 policy failures to prioritize full employment.

Posthumous Recognition

Following Hayes's death on December 15, 2019, his manuscript for John Maynard Keynes: The Art of Choosing the Right Model was published posthumously by Polity Press in 2020. The book distills his interpretations of Keynesian modeling, emphasizing the selection of appropriate analytical frameworks for economic policy, and has been noted for encapsulating his contributions to post-Keynesian thought. Tributes in academic journals highlighted his scholarly impact. G. C. Harcourt's obituary in The Economic and Labour Relations Review (2020) portrayed Hayes as "one of [the economics profession's] greatest and most original scholars of John Maynard Keynes," crediting his rigorous textual analysis of The General Theory and integration of monetary realism. This recognition underscored Hayes's role in reviving Marshallian-Keynesian traditions amid mainstream neoclassical dominance. In further posthumous recognition, the Post-Keynesian Economics Society established the Mark Hayes Prize in his honor, awarded annually for the best PhD student paper at their conference, reflecting his influence as a Keynes scholar and former society secretary. His work continued to receive citations in post-2019 scholarship on Keynesian economics, with EconPapers recording ongoing access to his papers despite his decease.

References

  1. https://www.cambridge.org/core/journals/the-economic-and-labour-relations-review/article/mark-gerard-hayes-21-september-195615-december-2019/D53D0A31DAD89D64A5C9410EBE0B7F0F
  2. https://research.gold.ac.uk/id/eprint/28357/1/Mark%20Hayes%20book%20review%20for%20publication.pdf
  3. https://www.econ.cam.ac.uk/news/2020/mark-hayes-1956-2019
  4. https://journals.sagepub.com/doi/abs/10.1177/1035304620947221
  5. https://www.elgaronline.com/view/journals/roke/10/4/article-p580.xml
  6. https://www.researchgate.net/publication/351571239_Mark_Gerard_Hayes_John_Maynard_Keynes_The_art_of_choosing_the_right_model_Cambridge_Polity_Press_2020_195_pp
  7. https://www.cambridge.org/core/services/aop-cambridge-core/content/view/D53D0A31DAD89D64A5C9410EBE0B7F0F/S103530460000137Xa.pdf/mark_gerard_hayes_21_september_195615_december_2019.pdf
  8. https://www.theguardian.com/global-development/2020/mar/12/mark-hayes-obituary
  9. https://books.google.com/books/about/Investment_and_Finance_Under_Fundamental.html?id=1OqD0AEACAAJ
  10. https://www.shared-interest.com/en/news-events/news/tribute-mark-hayes-founder-and-retired-managing-director-shared-interest-society
  11. https://find-and-update.company-information.service.gov.uk/officers/POqont1351xwZJBHyU3XpgrPABk/appointments
  12. https://www.theguardian.com/money/2004/mar/28/ethicalmoney.observercashsection
  13. https://theconversation.com/profiles/mark-hayes-114451
  14. https://research.gold.ac.uk/28357/1/Mark%20Hayes%20book%20review%20for%20publication.pdf
  15. https://www.semanticscholar.org/paper/The-Economics-of-Keynes%3A-A-New-Guide-to-The-General-Hayes/b3a07865df7fd032b660043d1ba5f1ab8c4ee574
  16. https://www.cambridge.org/core/journals/the-economic-and-labour-relations-review/article/mark-g-hayes-john-maynard-keynes-the-art-of-choosing-the-right-model-polity-press-cambridge-2019-xiii-224-pp-isbn-9781509528240-aud11595-hdbk-isbn-9781509528257-aud3595-pbk-isbn-9781509528288-aud2899-ebook/92182C79F9506948D24346752F0024FE
  17. https://www.elgaronline.com/edcollchap/edcoll/9781845424114/9781845424114.00009.pdf
  18. https://archive.org/details/economicsofkeyne0000haye
  19. https://www.postkeynesian.net/downloads/MGH2006.pdf
  20. https://www.politybooks.com/bookdetail/?isbn=9781509528240
  21. https://ideas.repec.org/p/pke/wpaper/pkwp1502.html
  22. https://ideas.repec.org/b/elg/eebook/12601.html
  23. https://www.jstage.jst.go.jp/article/revkeystud/2/0/2_195/_pdf/-char/ja
  24. https://ideas.repec.org/a/taf/eujhet/v15y2008i2p275-291.html
  25. https://www.academia.edu/44511462/Review_M_G_Hayes_John_Maynard_Keynes_The_art_of_choosing_the_right_model
  26. https://www.cambridge.org/core/journals/journal-of-the-history-of-economic-thought/article/mark-g-hayes-the-economics-of-keynes-a-new-guide-to-the-general-theory-cheltenham-and-northampton-edward-elgar-2006-pp-xvi-257-25-isbn-13-9781847200822/E1F97B1681ADDDE4BBDD15E236A808BA
  27. https://eh.net/book_reviews/john-maynard-keynes-2/
  28. https://ideas.repec.org/f/pha797.html
  29. https://academic.oup.com/cje/article-abstract/30/3/479/1730019
  30. https://papers.ssrn.com/sol3/papers.cfm?abstract_id=904723
  31. https://postkeynesian.net/event/24052024-15th-annual-phd-student-conference/
  32. https://econpapers.repec.org/RAS/pha797.htm
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