Cohorts in Marketing. Similar to demographics, cohorts use quantifiable descriptors to identify target markets. Demographics, however, are the quantifiable descriptors themselves, such as the aforementioned age and household income.
The highest peaks are over 2,000 m (6,600 ft). Beijing Municipality consists of six city districts (previously eight, see Xuanwu and Chongwen), eight suburban districts and two rural counties. It covers a total area of 16,807.8 km2 (6,489.5 sq mi).
In imperial times, the old walled city of Beijing occupied 62 km2 (24 sq mi). The physical size of the city has grown more than tenfold in recent decades to about 750 km2 (290 sq mi). The inner suburbs (1,282 km2 (495 sq mi)), and outer suburbs (3,198 km2 (1,235 sq mi)) provide further space for growth.