I have panel data for a number of counties for two years only (t = 1,2). The treatment, let's assume it's a policy implementation programme, happens in between year 1 and 2 and it is a continuous treatment: certain counties receive it already in year 1, while other countries receive it in year 2, and with different intensities. (this means that there is no specific control group).
My question is:
Should I use a cut-off point (above and below the median) instead of a continuous treatment?