Definition: Non commercial transaction
Balance of Payments, IMF
One important category of transaction that is, by definition, non-commercial and thus has non market price is the provision of economic value for which the offset constitutes a transfer. In such transactions, one party receives a real or financial asset from another party and, in return, provides nothing of economic value. In addition to outright gifts, other transaction may take place at implied prices that include some element of grant or concession so that those prices also are not market prices.
International Monetary Fund (IMF), "Balance of Payments Manual" (BOP), Fifth Edition, Washington D.C., 1993