I'm using a cross sectional data in 2015, and have a poverty rate variable collected in different years according to case's region.
Can i add this variable to my model? If i can, how can i fix this problem? Can i solve this problem by adding regional fixed effect?
| ID | Region | Collection time of poverty rate | Poverty rate (problematic variable) | Other variables (collected in 2015) |
| 1 | a | 2014 | 11% | |
| 2 | a | 2014 | 13% | |
| 3 | a | 2014 | 15% | |
| 4 | b | 2014 | 13.50% | |
| 5 | b | 2014 | 11% | |
| 6 | c | 2015 | 13% | |
| 7 | c | 2015 | 14% | |
| 8 | d | 2013 | 13% | |
| 9 | d | 2013 | 23% | |
| 10 | d | 2013 | 24% |
