Control data complete?

[Corrod3]

Seems like we got all the control data. Ich tried to give an overview in the README. Are we done with the basic data gathering?

Regarding the now existing independent variables:

1. I am still not sure how to use the education data?
2. We have to decide one how we are documenting the manual part
3. Which unemployment data should we use?
4. Do we need another variable than population form that data set?