The filling in of the online questionnaire is random. Thus, it is not assured that the sample will represent properly the country’s population (men and women), the employees, the industries, occupations, etc. The database based solely on the data of the online questionnaire may not be totally reliable because respondents are usually those with high educational degrees who use Internet anyway. While those with low education who do physical work are under-represented.

Is Bérbarométer database a representative database? We can state that 10000-person-sample of Bérbarométer can be considered as representative. The sample’s division by geographic, industrial and occupational groups corresponds in general to official data (National Statistics Bureau, National Employment Service).