Although sample selection bias is a frequent problem of applied research, there has been no generalization of sample selection models with binary dependent variables of interest to data with temporal error correlations. We suggest a generalized estimating equation approach to panel data...

Germany should pay more attention to risks in procurement, manufacturing and sales in China. First, China's population has been shrinking since 2022 and is rapidly ageing; this will cause its economic strength as well as production and consumption opportuni-ties to decrease. Secondly, the threat...