Codes for: Are high school degrees and university diplomas equally inherited in the U.S.? A new measure of relative intergenerational mobility

Codes for replicating the results in the paper: Naszodi, A., Cuccu, L., (2019). "Are high school degrees and university diplomas equally inherited in the U.S.? A new measure of relative intergenerational mobility"用于复现下述论文研究结果的代码：Naszodi, A.、Cuccu, L.（2019）《美国的高中文凭与大学文凭的代际传承程度是否相当？一种相对代际流动性（intergenerational mobility）的新测度方法》