Response bias is considered as an important issue in the empirical research corresponding
to low rate of the response rate. The response rate of this research was not low compared to other
empirical research in supply chain and operations management field. However, this research
ensures whether there is a response bias exists or not. To perform the test of the response bias,
this research compares sales levels, firm size between responders and non responders, which are
available in the web survey. ANOVA analysis indicates no statistical significance between these
two groups, which means that the response bias between responders and non responders does not
exist in this research.