Ye Ma, Ph.D. (2020), the University of Groningen, is an economic historian currently working at Guangdong University of Foreign Studies. Her research focuses on living standards, demographic change, and industrial development in the early twentieth century.Bas van Leeuwen, Ph.D. (2007), is a senior researcher at the International Institute of Social History. He wrote extensively on human capital, historical national accounting, market performance, and socio-economic inequality, from ancient time to the present, in Europe, China, and the Former Soviet Union area.Jieli Li has been employed at Utrecht University and the International Institute of Social History. She wrote on Chinese economic history, global income, and inequality. Her publications include van Leeuwen, B. and J. Li (2014), "Education since 1820", in van Zanden, J., et al. (eds.), How Was Life?: Global Well-being since 1820.Meimei Wang, Ph.D. (2017), Renmin University, Ph.D. (2019), Utrecht University, is an economic historian who researched on Chinese economic history and Marxist economics. Her research focuses on Chinese rural development, mining history, and the social and economic changes related to Grand Canal.