Total receipts equal the number of transactions multiplied by the average transaction amount, subject to the source’s units and rounding. This decomposition can identify whether aggregate changes occur through frequency or transfer size. It cannot identify the number of unique senders, recipients or households. One migrant can send several transfers to one household, several family members can support the same recipient, and one person can receive money intended for a wider family group.
A hypothetical example illustrates the identification problem. Initially, 100 households each receive two transfers of $200, producing 200 transactions and $40,000 in total receipts. Later, 80 households each receive two transfers of $250. Total receipts remain $40,000, the average transaction rises and the number of transactions falls. Twenty households lose their transfers entirely. An unchanged total conceals a large distributional change.
Another allocation could produce exactly the same later aggregate: all 100 households receive money, but some consolidate several smaller payments into fewer larger transactions. That change could reduce fixed fees without reducing participation. Transaction data alone cannot distinguish these cases. Statements that a fall in payment counts means an equal number of families stopped receiving support require a recipient-level panel or another defensible identification method.
Survey data introduce a household perspective, with their own coverage and measurement limits. INEGI’s ENIGH 2024 results report average quarterly current household income of 77,864 pesos and average income from other countries of 598 pesos across all households. The latter is not the average transfer among recipients. The table also includes pensions, government benefits and other transfers as separate categories. Treating the entire transfer category as international remittances would materially overstate the relevant income source. INEGI, ENIGH 2024 results, pages 4–6.
A small mean across the full population can coexist with high dependence among recipients. If, hypothetically, four of every 100 households each receive 15,000 pesos in a quarter and all others receive zero, the population mean is 600 pesos. The conditional recipient mean is 15,000. Neither is an error; each answers a different question. Their difference is precisely why a national average should not be presented as a typical beneficiary’s resources.
Distribution also depends on whether the statistic averages household shares or divides aggregate remittances by aggregate household income. A low-income and high-income household receive different weights in those calculations. Reporting the denominator and weighting rule is essential when assessing exposure. A ratio can describe importance in household budgets without establishing whether remittances caused the observed income level or expenditure pattern.