年龄分类 meaning in Chinese

age category
character classification by age

He broke down those income tax totals by age group
按年龄分类,他给出了那些所得税总数的细目表。
The essential research of employment is the supply and demand of labor force . imitating the population research , we introduce the transfer probability and set up an evolutive model of labor distribution based on the age and occupation classification of labor force , then we use the model to study the practical transfer rule for labor force in different vocations
就业问题的本质是劳动力供需的研究，本文仿照人口研究，引进转移概率，建立了一个基于劳动力年龄分类和行业分类的劳动力就业分布的动态演化模型，具体研究劳动力在行业间的转移规律，对我国劳动力市场展开定量分析研究。