I had collected the expenditure of non-local tourists traveling to my study site. I asked them about the expenditure of petrol and some respondents gave me the answer. But, I am not sure whether I should input them into IMPLAN since the payment of petrol might have occurred outside the study area. The boundary of my study area is very small and those who drove their own car were within 150km distance and they might have fueled their tank at their place before traveling to study site. Should I ignore the expenditure for petrol since the value is not large, about USD360?
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