Definition
- The main work is the most time-consuming work of ART in the past 3 months
- Field of business/occupation of main is a field of activity of work/business/company/office where a person works, or produced by the company/office where a person works.
The method to determine whether an activity is a main job or not is as follows:
1. If respondent during the previous week only had one job, then the job is registered as the main job;
2. If respondent during the previous week had more than one job, then the job that takes most of the time is registered as the main job. If the jobs take equal time, then the job that provides the largest income is registered as the main job. If the time spent and the income are equal, then it's up to respondent, which job is considered the main job.