Use of Propensity Scores in Non-Linear Response Models: The Case for Health Care Expenditures
---- Acknowledgements -----
We are grateful to Paul J. Rathouz and Tyler J. VanderWeele for their suggestions on an earlier draft of this paper. We also thank seminar participants at the University of Chicago, York and Glasgow for their comments on this work. The views expressed in this paper are those of the authors and not necessarily those of the National Bureau of Economic Research, the University of Chicago, or the University of Pennsylvania. All errors are our own.