Threshold Regression With Nonparametric Sample Splitting
Yoonseok Lee, Yulong Wang
Journal of Econometrics, June 2023
This paper develops a threshold regression model where an unknown relationship between two variables nonparametrically determines the threshold.
We allow the observations to be cross-sectionally dependent so that the model can be applied to determine an unknown spatial border for sample splitting over a random field. We derive the uniform rate of convergence and the nonstandard limiting distribution of the nonparametric threshold estimator.
We also obtain the root-n consistency and the asymptotic normality of the regression coefficient estimator. We illustrate empirical relevance of this new model by estimating the tipping point in social segregation problems as a function of demographic characteristics; and determining metropolitan area boundaries using nighttime light intensity collected from satellite imagery.
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