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Social and Economic Impact Analysis of Solar Mini-Grids in Rural Africa: A Cohort Study from Kenya and Nigeria

Amy Town Carabajal, Akoua Orsot, Marie Pelagie Elimbi Moudio, Tracy Haggai, Chioma Joy Okonkwo, George Truett Jarrard, Nicholas Stearns Selby

TL;DR

This study addresses the gap in empirical measurement of the social and economic impacts of solar mini-grids in rural Africa by applying a cohort, pre–post design across 22 communities in Kenya and Nigeria and evaluating five KPIs: gender equality, productivity, health, safety, and economic activity. It leverages semi-structured surveys administered to 2,658 participants before and one year after connection, analyzed with a suite of paired statistical tests and regression analyses to quantify both household and community-level effects. Key findings show substantial improvements in schooling for girls, women's employment, productivity, health services, and reduced reliance on unclean energy, alongside country-specific income trends. The work offers practical insights for policy and investment in decentralized renewables and provides open data to enable replication and further policy analysis, while acknowledging limitations such as lack of a control group and data-type constraints.

Abstract

This study presents the first comprehensive analysis of the social and economic effects of solar mini-grids in rural African settings, specifically in Kenya and Nigeria. A group of 2,658 household heads and business owners connected to mini-grids over the last five years were interviewed both before and one year after their connection. These interviews focused on changes in gender equality, productivity, health, safety, and economic activity. The results show notable improvements in all areas. Economic activities and productivity increased significantly among the connected households and businesses. The median income of rural Kenyan community members quadrupled. Gender equality also improved, with women gaining more opportunities in decision making and business. Health and safety enhancements were linked to reduced use of hazardous energy sources like kerosene lamps. The introduction of solar mini-grids not only transformed the energy landscape but also led to broad socioeconomic benefits in these rural areas. The research highlights the substantial impact of decentralized renewable energy on the social and economic development of rural African communities. Its findings are crucial for policymakers, development agencies, and stakeholders focused on promoting sustainable energy and development in Africa.

Social and Economic Impact Analysis of Solar Mini-Grids in Rural Africa: A Cohort Study from Kenya and Nigeria

TL;DR

This study addresses the gap in empirical measurement of the social and economic impacts of solar mini-grids in rural Africa by applying a cohort, pre–post design across 22 communities in Kenya and Nigeria and evaluating five KPIs: gender equality, productivity, health, safety, and economic activity. It leverages semi-structured surveys administered to 2,658 participants before and one year after connection, analyzed with a suite of paired statistical tests and regression analyses to quantify both household and community-level effects. Key findings show substantial improvements in schooling for girls, women's employment, productivity, health services, and reduced reliance on unclean energy, alongside country-specific income trends. The work offers practical insights for policy and investment in decentralized renewables and provides open data to enable replication and further policy analysis, while acknowledging limitations such as lack of a control group and data-type constraints.

Abstract

This study presents the first comprehensive analysis of the social and economic effects of solar mini-grids in rural African settings, specifically in Kenya and Nigeria. A group of 2,658 household heads and business owners connected to mini-grids over the last five years were interviewed both before and one year after their connection. These interviews focused on changes in gender equality, productivity, health, safety, and economic activity. The results show notable improvements in all areas. Economic activities and productivity increased significantly among the connected households and businesses. The median income of rural Kenyan community members quadrupled. Gender equality also improved, with women gaining more opportunities in decision making and business. Health and safety enhancements were linked to reduced use of hazardous energy sources like kerosene lamps. The introduction of solar mini-grids not only transformed the energy landscape but also led to broad socioeconomic benefits in these rural areas. The research highlights the substantial impact of decentralized renewable energy on the social and economic development of rural African communities. Its findings are crucial for policymakers, development agencies, and stakeholders focused on promoting sustainable energy and development in Africa.
Paper Structure (23 sections, 14 equations, 16 figures, 3 tables)

This paper contains 23 sections, 14 equations, 16 figures, 3 tables.

Table of Contents

  1. Introduction
  2. Methodology
  3. Project Description and Data Collection
  4. Survey Design
  5. Analysis Techniques
  6. Paired Samples t-Test
  7. Wilcoxon Signed-Rank Test
  8. Sign Test
  9. McNemar's Test
  10. Pearson Correlation Coefficient
  11. Linear Regression t-Test
  12. Likelihood-Ratio Test
  13. Results
  14. Survey Distribution
  15. Characteristics of the Respondents
  16. ...and 8 more sections

Figures (16)

  • Figure 1: A solar mini-grid in Bayelsa, Nigeria
  • Figure 2: Distribution of Survey Questions
  • Figure 3: Investing more money to build a larger mini-grid leads to more girls and boys attending school.
  • Figure 4: The presence of a mini-grid reduces the time residents have to spend on household chores.
  • Figure 5: For every ten additional customers connected to a mini-grid, approximately one more business would report hiring at least one more female employee.
  • ...and 11 more figures