Research

Publications

Limited Monotonicity and the Combined Compliers LATE,  Review of Economics and Statistics, forthcoming (with Nadja van't Hoff and Arthur Lewbel) 

On the Role of the Zero Conditional Mean Assumption for Causal Inference in Linear Models, Canadian Journal of Economics, forthcoming (with federico Crudu, Michael Knaus, and Joeri Smits) 

The Gray Zone: How Not Imposing a Strict Lockdown at the Beginning of a Pandemic Can Cost Many Lives, Labour Economics, August 2024, Volume 89, 102580  (with Federico Crudu, Roberta Di Stefano, and Silvia Tiezzi ) 

The unseen toll: excess mortality during covid-19 lockdowns, Scientific Reports, October 2023, Volume 13,  Article number 18745 (with Florian Ege and Seetha Menon)

It's never too LATE: A new look at local average treatment effects with or without defiers, Econometrics Journal, September 2023, Volume 26, Issue 3, pages 378–404 (with Martin Huber and Christian M. Dahl)

The short-run effects of public incentives for innovation in Italy (with Marco Ventura), Economic Modelling, March 2023, Volume 120, 106178. 

Evaluation of an electronic health record system with a disease management program and health care treatment costs for Danish patients with Type 2 Diabetes, JAMA Network Open, May 2020,  Volume 3, Issue 5.  (with Rayan Pulleyblank and Kim R. Olsen)

Inference in instrumental variables models with heteroskedasticity and many instruments,  Econometric Theory, forthcoming (with Federico Crudu and Zsolt Sandor)

A Note on Testing the LATE Assumptions, Empirical Economics, November 2017, Volume 53, Issue 3, pages 1281–1286 (with Lukas Laffers)

Why do tougher caseworkers increase employment? The role of programme assignment as a causal mechanism, Review of Economics and Statistics, March 2017, Volume 99, Issue 1, pages 180-183 (together with Martin Huber and Michael Lechner)

Sharp IV bounds on average treatment effects on the treated  and other populations under endogeneity and noncompliance,  Journal of Applied Econometrics , January/February 2017, Volume 32 (together with Martin Huber and Lukas Laffers)

The finite sample performance of estimators for mediation analysis under sequential conditional independence, Journal of Business and Economic Statistics, January 2016, Volume 34, Issue 1, pages 139-160 (together with Martin Huber and Michael Lechner) 

Testing instrument validity for LATE identification based on inequality moment constraints, Review of Economics and Statistics,  May 2015, Volume 97, Issue 2, pages 398-411 (together with Martin Huber)

Sharp bounds on causal effects under sample selection, Oxford Bulletin of Economics and Statistics, February 2015 , Volume 77, Issue 1, pages 129–151.(together with Martin Huber)

Testing exclusion restrictions and additive separability in sample selection models, Empirical Economics, August 2014, Volume 47, Issue 1, pages 75-92. (together with Martin Huber)