Christoph Breunig

Information technology outsourcing and firm productivity: eliminating bias from selective missingness in the dependent variable

Michael E. Kummer, Christoph Breunig, Michael Kummer, 2019, The Econometrics Journal.

Testing Missing at Random Using Instrumental Variables

Christoph Breunig, 2019 .

Adaptive Estimation of Quadratic Functionals in Nonparametric Instrumental Variable Models

Christoph Breunig, Xiaohong Chen, Xiaohong Chen, 2021 .

Nonparametric regression with selectively missing covariates

Christoph Breunig, Peter Haan, P. Haan, 2018, Journal of Econometrics.