From: Returns, setbacks, and future prospects of bio-energy promotion in northern Ethiopia: the case of family-sized biogas energy
Study site
Target population
Sample size
Biogas users (treatment)
Non-biogas users (control)
Total
Ofla
516
55
110
Hintalo-Wajerat
1061
112
224
Enderta
310
33
66
1887
200
400