“…These include such variables as ethnicity, religion, language, place of birth, and parental education, which provide the connectors between different rounds of cross sections with the appropriate age adjustments. For example, the cohorts 23 For example, recent applications and further validations of these synthetic panels methods include Ferreira et al (2013), Cruces et al (2015), and Vakis et al (2015) for Latin American countries, Bourguignon, Moreno, and Dang (2018) and Foster and Rothbaum (2015) for Mexico, Balcazar et al (2018) for Colombia, Martinez et al (2013) for the Philippines, Garbero (2014) for Vietnam, Cancho et al (2015) for countries in Europe and Central Asia, Dang and Ianchovichina (forthcoming) for countries in the Middle East and North Africa region, Dang and Dabalen (in press) and Dang, Lanjouw and Swinkels (2017) for Sub-Saharan African countries, and Dang and Lanjouw (2017 and forthcoming) for India, Vietnam, and the United States. Researchers at international organizations including the UNDP and the Asian Development Bank have also applied these methods for analysis of welfare mobility (UNDP, 2016;Jha et al, 2018); see also OECD (2015) for an application by the OECD to study labor transitions in richer countries.…”