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Aggregate demand and supply

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  • Roger E. A. Farmer

Abstract

This paper is part of a broader project that provides a microfoundation to the General Theory of J. M. Keynes. I call this project “old Keynesian economics” to distinguish it from new‐Keynesian economics, a theory that is based on the idea that to make sense of Keynes we must assume that prices are sticky. I describe a multi‐good model in which I interpret the definitions of aggregate demand and supply found in the General Theory through the lens of a search theory of the labor market. I argue that Keynes' aggregate supply curve can be interpreted as the aggregate of a set of first‐order conditions for the optimal choice of labor and, using this interpretation, I reintroduce a diagram that was central to the textbook teaching of Keynesian economics in the immediate post‐war period.

Suggested Citation

  • Roger E. A. Farmer, 2008. "Aggregate demand and supply," International Journal of Economic Theory, The International Society for Economic Theory, vol. 4(1), pages 77-93, March.
    • Handle: RePEc:bla:ijethy:v:4:y:2008:i:1:p:77-93
    DOI: 10.1111/j.1742-7363.2007.00069.x
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    1. Roger E. A. Farmer, 1999. "Macroeconomics of Self-fulfilling Prophecies, 2nd Edition," MIT Press Books, The MIT Press, edition 2, volume 1, number 0262062038, April.
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    Cited by:

    1. Borys, Paweł & Doligalski, Paweł & Kopiec, Paweł, 2021. "The quantitative importance of technology and demand shocks for unemployment fluctuations in a shopping economy," Economic Modelling, Elsevier, vol. 101(C).
    2. Farmer, Roger E. A. & Plotnikov, Dmitry, 2012. "Does Fiscal Policy Matter? Blinder And Solow Revisited," Macroeconomic Dynamics, Cambridge University Press, vol. 16(S1), pages 149-166, April.
    3. Christian Schoder, 2017. "An estimated Dynamic Stochastic Disequilibrium model of Euro-Area unemployment," Working Papers 1725, New School for Social Research, Department of Economics.
    4. Farmer, Roger E.A., 2016. "The Evolution Of Endogenous Business Cycles," Macroeconomic Dynamics, Cambridge University Press, vol. 20(2), pages 544-557, March.
    5. Pascal Michaillat & Emmanuel Saez, 2015. "Aggregate Demand, Idle Time, and Unemployment," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 130(2), pages 507-569.
    6. Christian Schoder, 2017. "A Keynesian Dynamic Stochastic Disequilibrium model for business cycle analysis," Working Papers 1701, New School for Social Research, Department of Economics.
    7. Marco Guerrazzi, 2012. "Expectations, Employment and Prices: A Suggested Interpretation of the New «Farmerian» Economics," Politica economica, Società editrice il Mulino, issue 3, pages 369-395.
    8. Roger E A Farmer, 2020. "The importance of beliefs in shaping macroeconomic outcomes," Oxford Review of Economic Policy, Oxford University Press and Oxford Review of Economic Policy Limited, vol. 36(3), pages 675-711.
    9. Roger E.A. Farmer, 2017. "Post-Keynesian dynamic stochastic general equilibrium theory," European Journal of Economics and Economic Policies: Intervention, Edward Elgar Publishing, vol. 14(2), pages 173-185, September.
    10. Roger E. A. Farmer, 2012. "Confidence, Crashes and Animal Spirits," Economic Journal, Royal Economic Society, vol. 122(559), pages 155-172, March.
    11. Jesús Fernández-Villaverde, 2010. "The econometrics of DSGE models," SERIEs: Journal of the Spanish Economic Association, Springer;Spanish Economic Association, vol. 1(1), pages 3-49, March.
    12. Saez, Emmanuel & Michaillat, Pascal, 2013. "A Model of Aggregate Demand and Unemployment," CEPR Discussion Papers 9609, C.E.P.R. Discussion Papers.
    13. Marco Guerrazzi, 2011. "Search And Stochastic Dynamics In The Old Keynesian Economics: A Rationale For The Shimer Puzzle," Metroeconomica, Wiley Blackwell, vol. 62(4), pages 561-586, November.
    14. Farmer, Roger, 2019. "The Indeterminacy School in Macroeconomics," CEPR Discussion Papers 13745, C.E.P.R. Discussion Papers.
    15. Kazuo Mino, 2017. "Sunspot-Driven Business Cycles: An Overview," KIER Working Papers 973, Kyoto University, Institute of Economic Research.
    16. Schoder, Christian, 2020. "A Keynesian Dynamic Stochastic Disequilibrium model for business cycle analysis," Economic Modelling, Elsevier, vol. 86(C), pages 117-132.
    17. Roger E A Farmer, 2019. "The Indeterminacy Agenda in Macroeconomics," National Institute of Economic and Social Research (NIESR) Discussion Papers 507, National Institute of Economic and Social Research.
    18. Corrado Andini, 2009. "Teaching Keynes’s Principle of Effective Demand within the Real Wage vs. Employment Space," Forum for Social Economics, Taylor & Francis Journals, vol. 38(2-3), pages 209-228, January.
    19. Farmer, Roger E.A., 2010. "How to reduce unemployment: A new policy proposal," Journal of Monetary Economics, Elsevier, vol. 57(5), pages 557-572, July.
    20. Marco Guerrazzi, 2010. "How to Reduce Unemployment: Notes on Macro-Economic Stability and Dynamics," Discussion Papers 2010/106, Dipartimento di Economia e Management (DEM), University of Pisa, Pisa, Italy.
    21. Marco Guerrazzi, 2023. "The Keynesian nexus between the market for goods and the labour market," International Review of Economics, Springer;Happiness Economics and Interpersonal Relations (HEIRS), vol. 70(2), pages 195-216, June.

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    More about this item

    JEL classification:

    • E12 - Macroeconomics and Monetary Economics - - General Aggregative Models - - - Keynes; Keynesian; Post-Keynesian; Modern Monetary Theory
    • E2 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment
    • E24 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Employment; Unemployment; Wages; Intergenerational Income Distribution; Aggregate Human Capital; Aggregate Labor Productivity

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