National Development Council-Why are retail trade and wholesale trade compiled separately when compiling the NMI of industry categories instead of combing them under the same industry?

Taiwan Purchasing Managers' Index, PMI Q＆A

What is Taiwan Purchasing Managers' Index, PMI?
What industries are covered by the purchasing managers' survey? What is the index compilation method?
What is the relationship between manufacturing PMI and business cycles?
What is the difference between Non-Manufacturing Index, NMI and Service PMI?
What are the economic implications of the five indexes that make up Taiwan Purchasing Managers' Index?
What are the economic implications of the four indexes that make up Non-Manufacturing Index, NMI?
According to PMI survey results, employment index and new orders index or production index sometimes differ in the direction of change, how should it be interpreted?
In the PMI and NMI survey, what is the implication of inventories index?
Why are retail trade and wholesale trade compiled separately when compiling the NMI of industry categories instead of combing them under the same industry?
When the Taiwan PMI and NMI are released every month?

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Why are retail trade and wholesale trade compiled separately when compiling the NMI of industry categories instead of combing them under the same industry?

Although wholesale trade and retail trade are both commercial based, they vary in industrial characteristics. Retail trade can better reflect domestic consumption situations compared to wholesale trade. In consideration to the differences in industrial characteristics between the two, retail trade and wholesale trade are compiled separately when compiling the NMI of industrial categories.

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