Mathematica conducted evaluations of two activities and a related initiative under the Tanzania energy-sector project. The activities included laying a new submarine cable to provide a more reliable source of electricity to Unguja Island, extending lines into new areas, and offering low-cost electricity...
Grid Electricity May Curb Poverty in Tanzania, but Connection Rates Remain Low
Connecting households to the national electric grid may reduce poverty in Tanzania, but low connection rates make this service costly to provide. Rates of connection remain lower than anticipated even when households are given options for low-cost connections.
These findings come from an evaluation recently released by Mathematica of an energy-sector project launched by the Tanzanian government and funded by the Millennium Challenge Corporation (MCC). Through this partnership, new line extensions were built in roughly 337 rural and peri-urban communities, with a goal of connecting 35,000 more households to the energy grid. To boost household access to the grid—and to address high fees that often impede connections—the project offered low-cost-connections to households in a random subset of the communities getting new lines.
According to Mathematica’s evaluation, the project resulted in fewer than 11,000 new connections, falling well short of the goal that was designed to make the project financially viable. Other findings include the following:
- The project boosted connection rates in the communities selected to receive line extensions by 10 percentage points, up from 11 percent in the comparison group communities that were not targeted to receive lines funded by MCC.
- Line extensions raised people’s perceived safety at night by 20 percentage points, with just under half of respondents in the intervention communities reporting that they felt safe on more than half of the safety measures (walking at night, crime, and so on). Click here to learn more about the impacts of new electric line extensions on energy use, education, health and safety, and economic well-being.
- Rural electrification in Tanzania remains low for a number of reasons, including high connection fees, which can be more than 90 percent of an average household’s monthly income. For a subset of rural communities, the project offered connections at about 20 percent of the normal fee. These offers increased connection rates by about 13 percentage points, but connection rates remained below a third of the targeted households. This means that even if all communities had received these offers, the project still would not have reached its connectivity goal. Click here to learn more about the impacts of low-cost-connection offers in Tanzania.
- Connecting to the grid reduced poverty (as measured by per-capita consumption of less than $1 per day) by 16 percentage points—from around 66 percent to 50 percent. Click here to learn more about the impacts of connecting to the electric grid in Tanzania.
Increased access and connection to grid electricity in Tanzania could yield major benefits across a variety of economic and social outcomes. For example, connecting to the grid could raise household income by about 50 percent and reduce poverty by about 16 percentage points. However, improving access to the grid may not result in enough connections to cover the costs of building those lines. (These findings are based primarily on data from baseline and follow-up surveys that covered about 8,900 households across 178 communities targeted to receive new lines and another 182 comparison communities.)
More information about this study can be found in the issue brief and full report, “Grid Electricity Expansion in Tanzania by MCC: Findings from a Rigorous Impact Evaluation, Final Report.”
Tanzania Energy-Sector Impact Evaluation
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Grid Electricity Expansion in Tanzania by MCC: Findings from a Rigorous Impact Evaluation, Final Report
The Millennium Challenge Corporation’s energy-sector project was designed to promote economic growth and curb poverty in Tanzania. Mathematica conducted an evaluation of two project components: impacts of building new lines to the electricity grid and outcomes from offering low-cost-connections to households...