Supplementary data files for bilateral international migration flow estimates by sex

Supplementary data files, including<br><br>1. country_list.csv with country codes,country names, first and last period covered and availability of reported data used for validation exercise<br><br>2. country_period_validation.csv with types and sources of reported migration statistics for each country and period in each of collections used for the validation exercise<br>

补充数据文件，包含以下内容：<br><br>1. country_list.csv：涵盖国家代码、国家名称、所覆盖的起始与终止时段，以及本次验证工作所用已报告数据的可用性情况<br><br>2. country_period_validation.csv：涵盖本次验证工作所采用的各数据集中，每个国家对应各时段的已报告移民统计数据的类型与来源信息