what is the unit root of a dickey fuller test what would a dickey test indicate how does adf work what is the unit root of the dickey fuller test why do we use the adf test what does the adf test for if a process is stationary will it explode when does adf test for stationary atom what is unit root of dickey fuller test which hypothesis does an adf reject? when does gamma equal 0 which hypothesis would be used to prove that the process is stationary what is the adf used to test for what test to do for a process that is static what is the unit root for the adf model? what is the adf value is gamma zero a unit root what test is used to test for zero gamma what does gamma mean in adf adf definition