I have the following first-order difference equation
$$y_{t} = \frac{x_{t}}{1-\rho L} + \epsilon_{t}$$
where $L$ denotes the backshift operator, i.e., $L(x_{t}) = x_{t-1}$. I can obtain a solution to the followingthis difference equation heuristically, but I wasam wondering if there is a general procedure. The equation is:
$y_{t} = \frac{x_{t}}{1-\rho L} + \epsilon_{t}$, where $L$ denotes the backshift operator so that $L(x_{t}) = x_{t-1}$.
A solution (or the, I'm not sure )the solution?) is $y_{t} = \sum_{i = 0}^{\infty} \rho^{i}X_{t-i} + \epsilon_{t}$.
but I expected there is a general-procedure formula.$$y_{t} = \sum_{i = 0}^{\infty} \rho^{i}X_{t-i} + \epsilon_{t}$$
I looked in in Goldberger's text and couldn't find it there. Any reference is appreciated also. Thanks.