面板数据分析：地区、指标和时间序列
Suppose there are 'i' regions (1=1, 2, ..., n), 'j' evaluation indicators (j=1, 2, ..., m), and original panel data ('ab') is obtained in chronological order 'k' (k=1, 2, ..., T).
原文地址: https://www.cveoy.top/t/topic/lAkH 著作权归作者所有。请勿转载和采集!