Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/241909 
Year of Publication: 
2020
Series/Report no.: 
cemmap working paper No. CWP34/20
Publisher: 
Centre for Microdata Methods and Practice (cemmap), London
Abstract: 
In an important class of econometric problems, researchers select a target parameter by maximizing the Euclidean norm of a data-dependent vector. Examples that can be cast into this frame include threshold regression models with estimated thresholds and structural break models with estimated breakdates. Estimation and inference procedures that ignore the randomness of the target parameter can be severely biased and misleading when this randomness is non-negligible. This paper studies conditional and unconditional inference in such settings, accounting for the data-dependent choice of target parameters. We detail the construction of quantile-unbiased estimators and confidence sets with correct coverage, and prove their asymptotic validity under data generating process such that the target parameter remains random in the limit. We also provide a novel sample splitting approach that improves on conventional split-sample inference.
Subjects: 
Selective Inference
Sample Splitting
Structural Breaks
Threshold Regression
Misspecification
JEL: 
C12
C13
Persistent Identifier of the first edition: 
Document Type: 
Working Paper

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