Codes and Frequencies
Most IPUMS data transformations are performed using variable harmonization tables that specify how each value in the source data is recoded. Some variables also require programming logic in addition to the harmonization table. The harmonization documents for this variable are:
MIG1_5_CN indicates the person's province of residence five years ago in China.
Click on the Source Variables tab for information on place of residence for each sample year. Source variables may contain more geographic unit detail but are not suitable for cross-temporal comparison.
Comparability — General
Where boundaries changed over time, units were harmonized to create units with boundaries that remain stable over time.
- Hainan split from Guangdong in 1988.
- Chongqing split from Sichuan in 1997.
In 1990 and 2000, the original responses included options for residence in the "same county or city" or in "other county or city within the same province" five years ago. For MIG1_5_CN, these responses are assigned to their current province of residence.
In 2000, Hong Kong, Macau, Taiwan are not separately identified from locations abroad.
For the country of residence of international migrants, see MIGCTRY5 (Country of residence 5 year ago).
- China 1990: Persons age 5+
- China 2000: Persons age 5+
- China: 1990, 2000