2015年-世界发展银行全球_Willingness_to_Pay_and_Consumer_Acceptance_Assessment_for_Clean_Cooking_in_Uganda_74页_3mb

Summary of "Willingness to Pay and Consumer Acceptance Assessment for Clean Cooking in Uganda"

Core Content

This report presents the findings of a four-month study conducted in Kampala and Wakiso districts of Uganda, assessing consumer acceptance, willingness to pay (WTP), and the impact of improved biomass cookstoves. The study aimed to understand the value proposition of different stove models, their effect on fuel economy, and the long-term durability and adoption patterns in urban households.

Main Points

Study Overview

• Objective: To evaluate the market potential of clean cookstoves by analyzing consumer acceptance, WTP, and fuel efficiency improvements.
• Duration: May to August 2015.
• Focus: Clean cooking technologies in Uganda, including both charcoal and wood-burning stoves.
• Stove Models Tested: 7 models (5 charcoal-burning and 2 wood-burning) were evaluated across 379 households.
• Sample Size: A total of 379 households were included, with 55 households per stove model to ensure statistical reliability.

Intervention Stoves

Stove Model	Manufacturer	Country of Origin	Cost per Unit (USD)
Ugastove	Uganda Stove Manufacturers	Uganda	6.66
Briketi EcoStove	Green BioEnergy	Uganda	7
Envirofit Econochar 1.0	Envirofit	USA	23
Prakti Leo Char	Prakti Leo Char	India	23.6
Burn Jikokoa	Burn	Kenya	27.81
ACE 1 Solar Powered Biomass Stove	Africa Clean Energy	Lesotho	85
HSAA HomeStove	Biolite HomeStove	USA	50

Stove Use and Displacement

• Baseline vs. Post-Intervention: All stoves showed statistically significant displacement of baseline stove use.
• Charcoal Stoves: More likely to be used exclusively than wood-burning stoves.
• Exclusivity: Only 21% of households used the intervention stove exclusively.
• Adoption Rate: Over 80% of charcoal users adopted the intervention stove as their primary stove, while less than 30% of wood users did so.

Fuel Efficiency and Economy

• Fuel Savings: Measured using 3-day kitchen performance tests (KPTs).
• Charcoal Stoves: Burn Jikokoa showed the highest fuel savings (22% per household per day), followed by Ugastove (20%), Prakti Leo Char (16%), and Envirofit Econochar 1.0 (15%).
• Wood Stoves: ACE 1 and Biolite HomeStove showed savings of 27% and 21% respectively.
• Total Energy Use: Fuel savings in total energy use per household per day ranged from 10% to 32% across different stove models.

Willingness to Pay and Accept

• WTP Methodology: The Becker-deGroot-Marschak (BDM) experiment was used to assess WTP, but it was found to be less accurate due to participant uncertainty and risk aversion.
• WTA Findings: Participants were unwilling to accept prices significantly above their WTP, suggesting that WTP is influenced by liquidity constraints.
• Median WTP: When stoves were offered in three equal monthly installments, the median WTP was UGX 63,000 (US $19.39).
• Model Variations: Jikokoa and ACE 1 had the highest WTP, while Briketi and Ugastove had the lowest.

Durability and Field Performance

• Durability Study: Conducted 11-15 weeks post-intervention, assessing stove performance in urban homes over 2-3 months.
• Sample Size: 25-30 households per stove type were randomly selected for the durability study.
• Performance: Stoves showed varying levels of durability, with some experiencing issues such as overheating, sensor failure, and user adaptation challenges.

Methodology Highlights

• Study Design: Quasi-experimental approach, comparing stove use before and after introduction without a control group.
• Data Collection:
  • SUMS (Stove Use Monitoring System): Temperature-logging sensors were used to monitor stove usage.
  • KPT (Kitchen Performance Test): Standardized protocol to measure fuel consumption.
  • Demographics and Behavior: Surveys were conducted to collect data on cooking practices, fuel use, and consumer perceptions.
• Sample Selection: Multi-stage sampling was used to select households based on fuel type and population size.
• Field Team Training: Field staff were trained in stove operation and data collection, with some manufacturers providing support during the training phase.

Study Limitations

• Sample Size for SUMS: Small sample size (less than 20 per stove model) limited the statistical robustness of stove displacement analysis.
• WTP/WTA Conditions: Experimental conditions did not fully reflect real-world commercialization scenarios, such as installment payments.
• Cost Variations: Prices for international stoves did not include shipping, taxes, or duties, which could affect actual retail costs.
• Durability Assessment: Limited to 2-3 months of use, which may not reflect long-term performance.

Key Findings

• Fuel Savings: All stove models resulted in fuel savings, with the highest savings seen in Burn Jikokoa and ACE 1.
• Consumer Acceptance: Despite the benefits, traditional stove use remains high, indicating the need for continued promotion and support.
• WTP/WTA: WTP is influenced by income, price, and stove model, with liquidity constraints playing a key role in WTA.
• Durability: Stoves showed varying levels of durability, with some requiring more behavioral change from users.

Conclusion

The study highlights the importance of understanding consumer behavior and financial constraints when introducing clean cookstoves. While all models showed some level of displacement and fuel savings, the extent of adoption and WTP varied. The findings suggest that a combination of accurate WTP assessment, user education, and affordability strategies is essential for successful market penetration of clean cooking technologies in Uganda.