Spatial econometric analyses abound in spatial sciences such as regional and urban economics, geography, and planning. Although the origins of spatial econometrics can be largely traced back to the disciplines of economics and geography, the field of application has by now stretched out as far...

We consider treatment effect estimation via a difference-in-difference approach for data with local spatial interaction such that the outcome of observed units depends on their own treatment as well as on the treatment status of proximate neighbors. We show that under standard assumptions...