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EVI: Stata module to compute Epidemic Volatility Index (EVI) for detecting epidemic waves

Author

Listed:
  • Luis Furuya-Kanamori

    (University of Queensland)

  • Polychronis Kostoulas

    (University of Thessaly)

Programming Language

Stata

Abstract

evi is based on the volatility of the newly reported cases per unit of time (ideally per day) and issues an early warning when the rate of the volatility change exceeds a threshold ('c'). Issuance of consecutive early warnings is a strong indication of an upcoming epidemic wave. EVI is calculated for a rolling window of time series epidemic data ('lag'). At each step, the observations within the window are obtained by shifting the window forward over the time series data one observation at a time. The user should provide the minimum rise in mean cases between two consecutive weeks ('r') that, if present, should be detected.

Suggested Citation

  • Luis Furuya-Kanamori & Polychronis Kostoulas, 2021. "EVI: Stata module to compute Epidemic Volatility Index (EVI) for detecting epidemic waves," Statistical Software Components S459005, Boston College Department of Economics.
    • Handle: RePEc:boc:bocode:s459005
    Note: This module should be installed from within Stata by typing "ssc install evi". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
    as

    Download full text from publisher

    File URL: http://fmwww.bc.edu/repec/bocode/e/evi.sthlp
    File Function: help file
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/e/evi.ado
    File Function: program code
    Download Restriction: no
    File URL: http://fmwww.bc.edu/repec/bocode/e/evi_example_data.dta
    File Function: sample data file
    Download Restriction: no
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