Table S1.
Number of participants included in the between and within-family analyses by panel, sibship size, and birth-order position
| Sibship size | Birth order | Total by sibship size | Total | ||||
| 1 | 2 | 3 | 4 | ||||
| Between-family analyses | |||||||
| NCDS | |||||||
| Personality | 2 | 1,025 | 993 | 2,018 | 4,489 | ||
| 3 | 590 | 529 | 452 | 1,571 | |||
| 4 | 244 | 282 | 220 | 154 | 900 | ||
| Intelligence | 2 | 1,571 | 1,597 | 3,168 | 7,256 | ||
| 3 | 898 | 883 | 745 | 2,526 | |||
| 4 | 409 | 506 | 364 | 283 | 1,562 | ||
| NLSY | |||||||
| Personality | 2 | 975 | 757 | 1,732 | 3,178 | ||
| 3 | 457 | 261 | 308 | 1,026 | |||
| 4 | 153 | 93 | 78 | 96 | 420 | ||
| Intelligence | 2 | 904 | 730 | 1,634 | 2,914 | ||
| 3 | 412 | 232 | 281 | 925 | |||
| 4 | 121 | 68 | 70 | 96 | 355 | ||
| SOEP | |||||||
| Personality | 2 | 2,863 | 2,351 | 5,214 | 9,363 | ||
| 3 | 1,093 | 1,021 | 786 | 2,900 | |||
| 4 | 357 | 329 | 314 | 249 | 1,249 | ||
| Intelligence | 2 | 956 | 734 | 1,690 | 3,117 | ||
| 3 | 355 | 356 | 262 | 1,001 | |||
| 4 | 134 | 120 | 109 | 91 | 454 | ||
| Combined | |||||||
| Personality | 2 | 4,863 | 4,101 | 8,964 | 17,030 | ||
| 3 | 2,140 | 1,811 | 1,546 | 5,497 | |||
| 4 | 754 | 704 | 612 | 499 | 2,569 | ||
| Intelligence | 2 | 3,441 | 3,061 | 6,492 | 13,287 | ||
| 3 | 1,665 | 1,471 | 1,288 | 4,424 | |||
| 4 | 664 | 694 | 543 | 470 | 2,371 | ||
| Within-family analyses | |||||||
| NLSY | |||||||
| Personality | 2 | 366 | 366 | 732 | 2,062 | ||
| 3 | 271 | 384 | 164 | 819 | |||
| 4 | 123 | 183 | 142 | 63 | 511 | ||
| Intelligence | 2 | 448 | 448 | 896 | 2,399 | ||
| 3 | 307 | 451 | 196 | 954 | |||
| 4 | 112 | 187 | 166 | 84 | 549 | ||
| SOEP | |||||||
| Personality | 2 | 311 | 311 | 622 | 1,094 | ||
| 3 | 119 | 128 | 103 | 350 | |||
| 4 | 36 | 37 | 28 | 21 | 122 | ||
| Combined | |||||||
| Personality | 2 | 677 | 677 | 1,354 | 3,156 | ||
| 3 | 390 | 512 | 267 | 1,169 | |||
| 4 | 159 | 220 | 170 | 84 | 633 | ||