The influence of the membership
fee (ln MF) is positive, which means that the higher the membership fee, the higher the
stated WTP. Therefore, the first hypothesis (H1) can be confirmed. The positive and
significant income effect is in accordance with the previous assumption and, therefore,
the second hypothesis (H2) can be confirmed. The factor educational level also has a
positive and significant impact on the dependent variable, ln WTP. For this reason, the
third hypothesis (H3) can be accepted. The effect of the years of participation (ln YP)
is negative, which is not in accordance with the previous assumption of it having a positive influence