Eg. one technology was reached by more than 90% 0f participats. Which methods of impact assessment study more effective?
Apart from that you have Coarsened Exact Matching, Double difference
and triple difference methods
In the case like this where a program(intervention) applied to the whole population. We need a comparable set of population (without intervention) to measure the impact of the program. There are two methods which can be used.
1. If data exist for the same region before intervention. Use before and after approach along with difference and Difference in Difference method.
2. If data do not exist for that region before intervention, then select another region with the same socio-economic characteristics. Use PSM method to match households.
3. Use Difference or difference in difference methods(DiD) to measure outcome of the program.
Find an area beyond intervention which can be considered as control area and then apply PSM. You can follow the following World Bank publication:
Handbook on Impact Evaluation: Quantitative Methods and Practices
Shahidur R. Khandker
Gayatri B. Koolwal
Hussain A. Samad
Thank you!
Out intervention is not similar agro-ecology and no cultivation crop without intervention!
Follow the case studies/examples given in the book I suggested. RCT is the best - though difficult to implement unless one plans from the very beginning. PSM is a reasonable method. Both are not specific to a particular type of intervention. The designing is important.
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