@manuascript {600106,
	title = {Inference With Difference-in-Differences With a Small Number of Groups: A Review, Simulation Study, and Empirical Application Using SHARE Data},
	journal = {Medical Care},
	volume = {56},
	number = {1},
	year = {2018},
	note = {Working paper here.},
	pages = {97-105},
	url = {http://journals.lww.com/lww-medicalcare/Abstract/2018/01000/Inference_With_Difference_in_Differences_With_a.15.aspx},
	author = {Slawa Rokicki and Cohen, Jessica and Gunther Fink and Joshua A. Salomon and Mary Beth Landrum}
}
