Customer has monthly contract with telecommunication's company
1 = Yes
2 = No

Store visited
1 = Germanos
2 = Cosmote
3 = Vodafone
4 = Wind

Frequency of visits per month
1 = Once per month
2 = 2-3 times per month
3 = More than 3 times per month

Amount spent
1 = 1-20€
2 = 21-30€
3 = 31-40€
4 = 41€ or more

Adequate number of employees
1 = Strongly Disagree
2 = Disagree
3 = Neither agree nor disagree
4 = Agree
5 = Stongly Agree

Participant gender
1 = Man
2 = Woman

Participant's age
1 = 18-30
2 = 31-40
3 = 41-50
4 = 51-60
5 = 61 or older

Participant's educational level
1 = High School or Lyceum
2 = Undergraduate Student
3 = Bachelor's Degree
4 = Postgraduate Certificate / Master
5 = Doctorate / PhD

Participant's employment status
1 = Unemployed
2 = Employee in private sector
3 = Employee in public sector
4 = Freelancer
5 = Retired
6 = Other