一、自助法（Boostrap）
1.介绍：△ https://blog.csdn.net/mingyuli/article/details/81223463?utm_medium=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-1.control404&depth_1-utm_source=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-1.control40

△ https://blog.csdn.net/Marco458748194811/article/details/109224983?utm_medium=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-5.control404&depth_1-utm_source=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-5.control40

△ https://blog.csdn.net/qq_32071849/article/details/110821497?utm_medium=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-7.control404&depth_1-utm_source=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-7.control40

△ https://blog.csdn.net/zhangyue_lala/article/details/64437547

2.划分数据集：
△ https://blog.csdn.net/sdf57/article/details/119063276?utm_medium=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-3.control404&depth_1-utm_source=distribute.pc_feed_404.none-task-blog-2~default~BlogCommendFromBaidu~Rate-3.control40

二、EXCEL一些用法
1.VLOOKUP+IF实现多列匹配查找：
△ https://blog.csdn.net/lz6363/article/details/109279497

三、文献分享
1.Urbanization in the Developing World:Too Early or Too Slow?：
△  https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.34.3.150