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Jan Keil

Biographic Data

ID6559215
NAMEJan Keil
GIVEN NAMESJan
FAMILY NAMEKeil
SIGNATUREKEIL J
AFFILIATIONSUniversity of the West Indies at Mona, Kingston, Jamaica
ORCID0000-0002-6255-1890
VERIFIEDYes
TOTAL WORKS3
TOTAL CITATIONS3
WORKS AS AUTHOR3
WORKS AS EDITOR0
FIRST PUBLICATION YEAR2016
LATEST PUBLICATION YEAR2025
H-INDEX1
  • Early Struggles—The Relationship of Psychopathology and Development in Early Childhood

    Open Access•Annick Martin, Mirijam-Griseldis Galeris et al.•ARTICLE•Children•2025

    These findings highlight the need to identify psychopathology and associated developmental deficits early in childhood which might allow more targeted treatments, enhancing developmental opportunities for affected children

  • Explaining the Concentration-Profitability Paradox

    Jan Keil•ARTICLE•Review of Political Economy•2017•Cited by: 2•References: 11

    This paper explains an empirical paradox which is often found, but generally ignored: a significant negative econometric relationship between profitability and market share concentration. The phenomenon can appear when there is a negative correlation between market share and costs—for example due to economies of scale. I show that concentration becomes an indicator for the cost competitiveness of direct rivals within an industry. Profitability of…

  • Depreciated Depreciation Methods? Alternatives to Sraffa’s Take on Fixed Capital

    Jan Keil•ARTICLE•Review of Political Economy•2016•Cited by: 1•References: 2

    This article discusses the treatment of fixed capital in the classical theory of price. Sraffa uses non-linear depreciation of ‘physical’ capital that equalizes all annual profit rates individually, but violates the proportionality of monetary machine value reduction and physical use-up on an annual basis. One alternative is to apply simple linear depreciation that has equal annual fixed capital costs. The key for consistency is that the internal…

  • Explaining the Concentration-Profitability Paradox

    Jan Keil•ARTICLE•Review of Political Economy•2017•Cited by: 2•References: 11

    This paper explains an empirical paradox which is often found, but generally ignored: a significant negative econometric relationship between profitability and market share concentration. The phenomenon can appear when there is a negative correlation between market share and costs—for example due to economies of scale. I show that concentration becomes an indicator for the cost competitiveness of direct rivals within an industry. Profitability of…

  • Depreciated Depreciation Methods? Alternatives to Sraffa’s Take on Fixed Capital

    Jan Keil•ARTICLE•Review of Political Economy•2016•Cited by: 1•References: 2

    This article discusses the treatment of fixed capital in the classical theory of price. Sraffa uses non-linear depreciation of ‘physical’ capital that equalizes all annual profit rates individually, but violates the proportionality of monetary machine value reduction and physical use-up on an annual basis. One alternative is to apply simple linear depreciation that has equal annual fixed capital costs. The key for consistency is that the internal…

  • Depreciated Depreciation Methods? Alternatives to Sraffa’s Take on Fixed Capital

    Jan Keil•ARTICLE•Review of Political Economy•2016•Cited by: 1•References: 2

    This article discusses the treatment of fixed capital in the classical theory of price. Sraffa uses non-linear depreciation of ‘physical’ capital that equalizes all annual profit rates individually, but violates the proportionality of monetary machine value reduction and physical use-up on an annual basis. One alternative is to apply simple linear depreciation that has equal annual fixed capital costs. The key for consistency is that the internal…

  • Explaining the Concentration-Profitability Paradox

    Jan Keil•ARTICLE•Review of Political Economy•2017•Cited by: 2•References: 11

    This paper explains an empirical paradox which is often found, but generally ignored: a significant negative econometric relationship between profitability and market share concentration. The phenomenon can appear when there is a negative correlation between market share and costs—for example due to economies of scale. I show that concentration becomes an indicator for the cost competitiveness of direct rivals within an industry. Profitability of…

  • Early Struggles—The Relationship of Psychopathology and Development in Early Childhood

    Open Access•Annick Martin, Mirijam-Griseldis Galeris et al.•ARTICLE•Children•2025

    These findings highlight the need to identify psychopathology and associated developmental deficits early in childhood which might allow more targeted treatments, enhancing developmental opportunities for affected children

Econometrics (2 works) · Economics (2 works) · Microeconomics (2 works) · Monetary economics (2 works) · Profit (economics (2 works) · Amortization (1 work) · Capital (architecture (1 work) · Capital formation (1 work) · Child and Adolescent Psychosocial and Emotional Development (1 work) · Child Nutrition and Feeding Issues (1 work)

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