What are some capital punishment research questions that can provide insights into the effectiveness and ethical implications of the practice?

Some capital punishment research questions that can provide insights into the effectiveness and ethical implications of the practice include:

1. Does the death penalty act as a deterrent to violent crime?
2. What are the socio-economic and racial disparities in the application of the death penalty?
3. How accurate and reliable is the process of determining guilt in capital cases?
4. What are the psychological effects on individuals involved in the execution process?
5. What are the long-term societal impacts of using capital punishment as a form of justice?