I'm trying to reconcile two numbers from the same national statistical agency. I'm looking for a dummy's guide for what defines the difference between the two numbers and how to use one to estimate the other.
I'm looking at retail sales in South Africa.
According to national accounts, the GDP contribution
in current prices in 2012 for retail, wholesale, the motor trade, catering and hotel accommodation is (in millions Rand): 452,717
, p 10).
According to Stats SA's statistical releases, the value of the retail market
alone (current prices, 2012, millions Rand) is 654,135
, p 7). Wholesale retail is worth 1,356,722
), the motor trade is worth 479,634
), catering is worth 40,698
) and hotel accommodation is worth 14,266
This totals 2,545,455
I'm aware the larger number includes taxes. The smaller number from national accounts does not. I believe the smaller number from national accounts does not double count, so a good being passed through from manufacturer to wholesaler to retailer will not be valued all through that chain discretely within the national accounts.
Nonetheless, I'm struggling to understand how an aggregate national accounts number for the whole retail/wholesale/motor trade/foodservice/hotel sectors would be less than a fifth of the actual industry size.
And specifically, I'm trying to work out for other countries where I only have the national accounts number how I can work back to an estimation of the actual market size.