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The reproduction number and its measurement. A critique of the Robert Koch Institute. Revised

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  • Quaas, Georg

Abstract

The Robert Koch Institute (RKI) has the goal of „protecting the population from disease and improving their state of health“ (RKI 2017). To this end, it develops research-based concrete recommendations for policy and makes data available to the expert public. Since the April 3, 2020, it has been publishing daily the numbers of corona infections reported by the health authorities, since the April 9, 2020, also the number of deaths from this infection and since April 25, 2020, the estimated number of convalescents. The so-called reproduction number reported since April 7, 2020, have largely superseded all other criteria by which the public health policy is guided. This article shows that the calculation of this figure by the RKI is neither theory-based nor particularly reliable. Nevertheless, there is a simple way to determine this number in the framework of the classic epidemic model (CEM). This study makes explicit important parts of the theoretical background of the CEM with the goal to underline that the method of determining the reproduction number empirically is a theoretically defined matter and cannot be replaced by a phenomenological method.

Suggested Citation

  • Quaas, Georg, 2020. "The reproduction number and its measurement. A critique of the Robert Koch Institute. Revised," MPRA Paper 101026, University Library of Munich, Germany, revised 10 Jun 2020.
    • Handle: RePEc:pra:mprapa:101026
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    References listed on IDEAS

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    1. Robert M. Solow, 1956. "A Contribution to the Theory of Economic Growth," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 70(1), pages 65-94.
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    More about this item

    Keywords

    Classic epidemic model; reproduction number; economic cost of health policy;
    All these keywords.

    JEL classification:

    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • C61 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Optimization Techniques; Programming Models; Dynamic Analysis
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health

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