Table 1 The index system of working conditions.

From: Analysing the heterogeneity in working conditions of migrant informal workers in China: a test of the WIEGO model of informal employment

Factors

Measurement index

Content

Weight

Economic income

Monthly income

Personal wage/net income of last month (or last employment) (excluding expenses of the bag eats encase)

0.098

Employment contract

Types of employment contract

Types of employment contract: Fixed term, Open-ended term, Probation period = 1; No employment contract, Completion of one-time task, Don’t know = 0

0.142

Social security

Types of medical insurance

Types of social medical insurance: Free medical care, Medical insurance for urban workers = 2; Medical insurance for urban residents, Cooperative medical insurance for urban and rural residents, New rural cooperative medical insurance = 1; Lack of insurance = 0

0.221

Life situation

Difficulties in life

What are the main difficulties in your family: No difficulty = 2; Can’t afford a house, Look down upon by locals, Children’s schooling problems, Unaccustomed to life, Other = 1; Bad business, Difficult to find a stable job, Low income = 0

0.121

Working intensity

Workweek

Working hours of the week (hours)

0.136

Union support

Participation in union activities

Since 2016, have you participated in activities organized by unions: Yes = 1; No = 0

0.132

Community support

Participation in community affairs

Since 2016, have you ever experienced “providing advice to your enterprise/community/village or supervising unit/community/village affairs management”: Often = 3; Sometimes = 2; Seldom = 1, Never = 0

0.150