and Serbia, without whose support this report could not have been produced. We also would like to thank our counterparts in the various countries including Liljana Zivkovic, Adelina Greca, Joni Baboci, and Genci Khojdelhi, and teams as well as representatives from all national statistical offices who supported us in the data gathering. ii A note on data This Urbanization Review is a regionally focused report that includes countries in the Western Balkan region-those that make up the former Socialist Federal Republic of Yugoslavia, barring Slovenia, as well as Albania. The report acknowledges that among these countries, Croatia has been a member state of the European Union since 2013. The larger objective of the report is to shed light on the economic, demographic, and urbanization trends across the seven countries of Albania, Bosnia and Herzegovina, Croatia, Kosovo, Montenegro, North Macedonia, and Serbia, and in doing so, inform policy recommendations that would result in economic and welfare gains. It is important to note, however, that due to severe data limitations-in terms of availability, quality, and comparability-both at the national and subnational levels, analyses across the four chapters are varied with regard to the inclusion of specific countries, the time frames considered, as well as the sub-regional focus in the level of disaggregation. Having said that, to fulfill the objective of the report as well as to deliver robust findings, data gaps wherever possible were substituted with supplementary data sources, and multiple sources were considered to corroborate key messages Chapter 1: The chapter includes all seven countries when data are available and comparable. National level analysis of urbanization, demographic and economic trends is based mainly on World Development Indicators (2018) and The United Nations World Urbanization Prospects (2017 Revision) which use the official definition of urban areas to establish urbanization levels. The study of the linkages between the share of the urban population and economic development is based on a global dataset produced by Roberts et al. 2017, which uses definitions of urban areas consistent across countries. For the city-level analysis, the chapter relies mainly on two datasets: a global urban dataset produced by Roberts et al. 2017 and an Eastern Europe and Central Asia city dataset produced by Restrepo et al. 2017. Chapter 2: The chapter includes the capital cities Sarajevo, Tirana, Belgrade, Skopje, Podgorica, and Zagreb when data are available and comparable. Analysis of economic and demographic indicators relied on the Oxford Economics 2016 Global dataset as well as data from national statistical offices, when available. In most cases the time period used was post 2009, and the definition of capital cityregion was maintained at the NUTS 3 level to ensure consistency across countries. The Enterprise Survey (2013) and the Doing Business Report (2019) were used for characterizing the business regulatory environment. The water utility database compiled...