Multidimensional assessment of the ESG profile of Portuguese municipalities: A proposal for a composite index using official indicators

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Type of the article: Research Article

Abstract
Measuring environmental, social, and governance (ESG) performance in the public sector requires tools capable of integrating heterogeneous, comparable, and geographically disaggregated information. This study aims to develop a composite index for the 308 Portuguese municipalities between 2018 and 2022, based on 95 officials' environmental, social, and governance indicators standardized through min-max normalization and combined using neutral weighting. The findings indicate that annual mean values remained relatively stable, ranging from 32.030% to 33.105%, with moderate growth until 2021 followed by a decline in 2022. The distribution was strongly concentrated around central values but retained substantial dispersion, with scores ranging from 26.361% to 72.621%, indicating persistent territorial disparities. In addition, jackknife analysis showed that the annual mean was only weakly affected by the exclusion of individual municipalities. The index does not measure reporting quality, formal ESG adoption, institutional transparency, or the causal effectiveness of public policies. Its contribution lies in providing a relative, transparent, replicable, and comparable measure for exploratory analysis of municipal ESG patterns.

Acknowledgment
This article is financed by CINAV–Navy Research Centre [CINAV–Centro de Investigação Naval].

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    • Figure 1. Variation in the municipal ESG profile index (2018–2022)
    • Figure 2. Choropleth maps of municipal ESG statistical profiles (2018–2022)
    • Table 1. Descriptive statistics for the municipal ESG profile index, 2018–2022
    • Table 2. Jackknife analysis of the annual average
    • Conceptualization
      Ricardo de Moraes e Soares
    • Formal Analysis
      Ricardo de Moraes e Soares, Alexandre Morais Nunes
    • Investigation
      Ricardo de Moraes e Soares
    • Methodology
      Ricardo de Moraes e Soares, Alexandre Morais Nunes
    • Project administration
      Ricardo de Moraes e Soares
    • Resources
      Ricardo de Moraes e Soares, Alexandre Morais Nunes, Paula Heliodoro, Ana Catarina Kaizeler, Vanda Martins
    • Software
      Ricardo de Moraes e Soares
    • Supervision
      Ricardo de Moraes e Soares
    • Visualization
      Ricardo de Moraes e Soares, Alexandre Morais Nunes, Paula Heliodoro, Ana Catarina Kaizeler, Vanda Martins
    • Writing – original draft
      Ricardo de Moraes e Soares
    • Writing – review & editing
      Ricardo de Moraes e Soares, Alexandre Morais Nunes, Paula Heliodoro, Ana Catarina Kaizeler, Vanda Martins
    • Validation
      Alexandre Morais Nunes, Paula Heliodoro, Ana Catarina Kaizeler, Vanda Martins