@unpublished{publication-19197,
	author={Voth, Hans-Joachim and Xu, Guo},
	institution={Centre for Economic Policy Research},
	issn={0265-8003},
	number=13963,
	pages=69,
	series={CEPR Discussion Papers},
	title={Patronage for productivity: selection and performance in the age of sail},
	year=2019,
}