@unpublished{publication-24598,
	author={Sch{\"a}per, Julius and Winkelmann, Rainer},
	institution={University of Zurich},
	issn={1664-7041},
	number=445,
	pages=24,
	series={Working paper series / Department of Economics},
	title={Random effects panel data models with known heteroskedasticity},
	year=2024,
}