For example, for variable (X_{{ijl_{1} t}}), a four-dimensional matrix I × J × l 1 × T is defined.
Standardized units of difference between genders were calculated for each variable according to country and are shown as an example for two variables: HAQ (Table 3) and DAS28 (Table 4).
For example, for the variable education (among only Vietnamese), this variable is set to missing for women who are not Vietnamese.
Following, for example, for the variable "job satisfaction" we used six questions out of the QUALICOPC questionnaire, and did not employ any further validated questionnaires.
For example, for the variable "SLE1", the middle numeric column indicates that 17.48 % of the students included in this study experienced a failure in examination while 82.52 % did not.
For example, variables for the way of gaining entry to work are −1, 0, and 1, standing for variation from pulling strings to not pulling strings, being invariant, and from not pulling strings to pulling strings, separately.
For example, variables for unit nature are −1, 0, and 1, and these represent variation between state-owned and privately owned sectors, which are invariant, and between privately owned and state-owned, respectively.
For example, variables names for the evaluation form usually started with EV, while those for the 90-day (quarterly) evaluation started with Q90.
For each of these variables we formulated a definition, coding rules and examples for the variable's main category, and if necessary, for all sub-categories.
For example, variables and are constrained because for,.
