ECONOMIC INEQUALITY ANALYSIS ACROSS REGENCIES AND CITIES IN JAMBI PROVINCE USING THE WILLIAMSON AND THEIL INDICES

Ajie Nugraha Pratama, NIM.: 22108010051 (2025) ECONOMIC INEQUALITY ANALYSIS ACROSS REGENCIES AND CITIES IN JAMBI PROVINCE USING THE WILLIAMSON AND THEIL INDICES. Skripsi thesis, UIN SUNAN KALIJAGA YOGYAKARTA.

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Abstract

The present study employs a dual-index approach, namely the Williamson Index and the Theil Entropy Index, to examine inter-regional economic inequality across the nine regencies and two cities in Jambi Province over the period 2014–2024. The research employs a descriptive–quantitative design, utilising annual secondary data on GRDP at constant prices (base year 2010) and population data from official BPS publications, which are processed in RStudio. The findings indicate a general decline in inequality from 2014 to 2023, followed by a rebound in 2024. The Williamson Index demonstrated a decline from 0.495 in 2014 to 0.419 in 2023, subsequently rising to 0.448 in 2024. The mean of 0.460 signifies medium-high and structurally persistent inequality. The Theil Index exhibited a consistent pattern, declining from 0.113 (2014) to 0.079 (2023) and rising to 0.096 (2024), with a mean of 0.098, indicative of moderate yet entrenched inequality. Decomposition results indicate that inequality is consistently driven by a small number of districts with per capita GRDP far above the provincial average. This is most notably evident in Tanjung Jabung Barat and Tanjung Jabung Timur throughout the observed period (2014–2023), while 2024 shows Tebo emerging as a major contributor alongside Tanjung Jabung Barat.

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