@unpublished{publication-6787,
	author={Baetschmann, Gregori and Staub, Kevin E and Winkelmann, Rainer},
	institution={University of Zurich},
	issn={1664-7041},
	number={No. 4},
	pages=36,
	series={Working paper series / Department of Economics},
	title={Reconsidering the analysis of longitudinal happiness data - with an application to the effect of unemployment},
	year=2011,
}