This chapter documents the variables. It reports the guide to the codebook (2.1), a list of the variables (2.2), and their documentation (2.3).

Guide to the codebook

To illustrate the layout of the documentation of the variables documented in Section 2.3, an example is given in Scheme 2.1. The letters in parentheses refer to the notes presented after Scheme 2.1.

• (a) Indicates the variable number. A variable number has been assigned to each variable in the SPSS system file. These variable numbers are identical to the ones presented in this documentation. Many of the variables included in this survey were also included in previous surveys (please, check the references). These identical variables have the same variable numbers in all surveys.

• (b) Indicates the variable label used in the SPSS system file. Because the maximum length of the variable labels was set at forty characters, a lot of abbreviations had to be used.

• (c) Indicates the question or statement text in English. In some cases, this translation differs slightly, not substantially from the ones presented in previous documentations (please, check the references).

• (d) The question identification indicates the number(s) of the question or statement in the original questionnaire(s). In case a variable is not based on a question or statement, no question identification is given.

• (e) Indicates the code values for the single answer categories.

• (f) Indicates the textual definition of the codes, that is, their value labels.

• (g) Indicates the absolute frequencies (left column), the relative frequencies (middle column), and the adjusted (adjusted for missing value(s)) relative frequencies (right column) of the variables.

Variables description list

In this section, original and constructed variables are listed. To provide readers with some conceptual understanding, the list contains headings for themes (CAPITAL) and subthemes (italic).

DATA SAMPLE AND INTERVIEW

Data sample

A0007 respondent identification-number (ITS)

B0006 region

M0001 municipality identification number (CBS)

V2316 urbanisation category municipality

V1180 province identification number

V1900 zip code four digits

V5241 respondent place of residence

V5242 eurostat 3-level nuts classification

Data interview

V0277 date of interview

V0281 interview duration

V0268 interviewer identification number

I0006 Interview number

V2315 willing to complete mail questionnaire

V5223 which coupon would you want

V2371 willing to cooperate again in the future

V5224 may I have your name and address

V5225 interviewer check name address information