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How Short Is the Short Run in the Neo-Kaleckian Growth Model?

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  • Ettore Gallo

Abstract

The paper provides an analytical solution to the differential equation that regulates the motion of the neo-Kaleckian model in the short run. After presenting a simple open economy neo-Kaleckian model with government activity, the paper analytically derives an expression for the time of adjustment, defined as the time required for the system to make a k percent adjustment from one steady-state to another. The solution shows that there is an inverse relationship between the time of adjustment and (i) the strength of the Keynesian stability condition; (ii) the behavior of entrepreneurs underlying their decisions to more rapidly/slowly respond to changes in goods market conditions. Last, the model is calibrated for the US, showing that the vicinity of the new equilibrium is reached after a period of about 5 quarters under a baseline calibration. By formally analyzing the out-of-equilibrium trajectory of the neo-Kaleckian model, this contribution moves away from the method of comparative dynamics and provides a historical-time representation of the model's traverse.

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  • Ettore Gallo, 2023. "How Short Is the Short Run in the Neo-Kaleckian Growth Model?," Review of Political Economy, Taylor & Francis Journals, vol. 35(3), pages 687-701, July.
    • Handle: RePEc:taf:revpoe:v:35:y:2023:i:3:p:687-701
    DOI: 10.1080/09538259.2022.2150436
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    1. Ettore Gallo, 2022. "When is the long run?—Historical time and adjustment periods in demand‐led growth models," Metroeconomica, Wiley Blackwell, vol. 73(4), pages 1155-1178, November.
    2. Ettore Gallo & Mark Setterfield, 2022. "Historical Time and the Current State of Post-Keynesian Growth Theory," Working Papers 2204, New School for Social Research, Department of Economics.

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