ISCO-88 derived classification
Thanks for answering my previous question. Additionally, I'd be interested to know if there is an overview over how the three-digit ISCO-88 classification was constructed (Variable: jlisco88. I understand that it follows the classic ISCO-88 definition but I am puzzled regarding the values 10, 11 and 200 who do not seem to fit into the standard classification to my knowledge.
Thanks and kind regards,