Table 2 Estimated bilateral migration flows from stock differencing. On the left side are the estimated migration flows when negative differences are set to zero. On the right side are the estimated migration flows when negative stock differences are reversed. Diagonal elements are all zero.
From: Bilateral international migration flow estimates for 200 countries
Stock Differencing - Drop Negatives | Stock Differencing - Reverse Negatives | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Origin (t) | Destination (t + 1) | Origin (t) | Destination (t + 1) | ||||||||
A | B | C | D | Sum | A | B | C | D | Sum | ||
A |  | 0 |     5 |     5 | 10 | A |  |    5 |     5 | 30 |    40 |
B |    0 |  |     0 |     0 |     0 | B |     5 |  | 10 | 45 |    60 |
C | 25 | 0 |  | 10 | 35 | C | 25 |    5 |  | 10 |    40 |
D |    0 | 0 | 15 |  | 15 | D |     0 | 35 | 15 |  |    50 |
Sum | 25 | 0 | 20 | 15 | 60 | Sum | 30 | 45 | 30 | 85 | 190 |
