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Table A-7. Imputation for nonresponse in doctorate-granting institutions, by field and graduate enrollment, postdoctorate, or doctorate-holding nonfaculty researcher status: 2013–15

Year and field Organizational units in universe Total in survey Number imputed Imputation rate (%)
Full-time students Part-time students Postdoctoral appointees Doctorate Nonfaculty researchers Full-time students Part-time students Postdoctoral appointees Doctorate Nonfaculty researchers Full-time students Part-time students Postdoctoral appointees Doctorate Nonfaculty researchers
Fall 2015, all surveyed fields 13,506 464,695 140,249 63,700 25,199 7,543 3,202 1,446 2,392 1.6 2.3 2.3 9.5
Science and engineering 10,594 425,174 123,481 45,168 18,519 6,642 2,908 872 1,634 1.6 2.4 1.9 8.8
Science 8,628 302,069 86,215 37,514 15,600 5,377 2,453 781 1,381 1.8 2.8 2.1 8.9
Agricultural sciences 517 12,300 4,869 1,514 736 32 35 33 33 0.3 0.7 2.2 4.5
Biological sciences 2,470 62,507 10,455 19,257 6,929 668 229 410 818 1.1 2.2 2.1 11.8
Communication 206 6,297 3,475 83 30 116 174 2 0 1.8 5.0 2.4 0.0
Computer sciences 480 49,104 19,093 887 458 1,660 275 20 53 3.4 1.4 2.3 11.6
Earth, atmospheric, and ocean sciences 449 11,818 2,615 2,117 1,748 105 12 26 172 0.9 0.5 1.2 9.8
Family and consumer sciences and human sciences 109 2,249 1,333 103 74 0 0 0 10 0.0 0.0 0.0 13.5
Mathematics and statistics 470 20,337 4,032 1,007 235 93 95 37 24 0.5 2.4 3.7 10.2
Multidisciplinary and interdisciplinary studies 436 4,777 2,230 967 621 139 198 3 29 2.9 8.9 0.3 4.7
Neurobiology and neuroscience 213 4,728 186 1,957 717 40 0 39 40 0.8 0.0 2.0 5.6
Physical sciences 698 35,751 3,543 7,322 2,692 171 103 145 109 0.5 2.9 2.0 4.0
Psychology 680 29,002 9,863 1,123 471 765 598 40 26 2.6 6.1 3.6 5.5
Social sciences 1,900 63,199 24,521 1,177 889 1,588 734 26 67 2.5 3.0 2.2 7.5
Engineering 1,966 123,105 37,266 7,654 2,919 1,265 455 91 253 1.0 1.2 1.2 8.7
Aerospace engineering 65 3,991 1,265 217 67 0 0 9 0 0.0 0.0 4.1 0.0
Agricultural engineering 41 1,380 250 221 70 0 0 0 3 0.0 0.0 0.0 4.3
Architecture 53 1,367 180 17 6 0 0 0 1 0.0 0.0 0.0 16.7
Biomedical engineering 163 8,494 1,087 1,201 289 38 16 15 31 0.4 1.5 1.2 10.7
Chemical engineering 152 8,785 1,126 1,283 264 0 10 0 22 0.0 0.9 0.0 8.3
Civil engineering 264 14,908 4,788 669 361 32 17 3 27 0.2 0.4 0.4 7.5
Electrical engineering 304 37,756 10,943 1,160 491 1,093 296 7 39 2.9 2.7 0.6 7.9
Engineering science, mechanics, and physics 60 1,369 334 251 184 0 0 8 11 0.0 0.0 3.2 6.0
Industrial and manufacturing engineering 163 9,485 5,669 142 150 0 0 7 25 0.0 0.0 4.9 16.7
Mechanical engineering 216 19,742 6,196 1,160 425 36 83 15 62 0.2 1.3 1.3 14.6
Metallurgical and materials engineering 161 6,792 893 911 289 10 6 13 15 0.1 0.7 1.4 5.2
Mining engineering 21 300 107 15 20 0 0 0 0 0.0 0.0 0.0 0.0
Nuclear engineering 29 1,198 251 107 26 0 0 0 2 0.0 0.0 0.0 7.7
Petroleum engineering 22 1,560 461 73 56 0 0 0 0 0.0 0.0 0.0 0.0
Engineering nec 252 5,978 3,716 227 221 56 27 14 15 0.9 0.7 6.2 6.8
Health 2,912 39,521 16,768 18,532 6,680 901 294 574 758 2.3 1.8 3.1 11.3
Clinical medicine 2,008 16,394 8,227 15,843 5,491 301 167 514 616 1.8 2.0 3.2 11.2
Other health 904 23,127 8,541 2,689 1,189 600 127 60 142 2.6 1.5 2.2 11.9
Fall 2014new, all surveyed fieldsa 13,140 452,801 136,151 63,446 23,642 4,553 2,232 2,055 2,290 1.0 1.6 3.2 9.7
Science and engineering 10,271 414,209 120,220 44,496 17,368 3,971 1,821 1,070 1,669 1.0 1.5 2.4 9.6
Science 8,365 294,446 83,625 37,195 14,632 3,278 1,492 951 1,417 1.1 1.8 2.6 9.7
Agricultural sciences 489 11,509 4,558 1,394 613 75 4 19 34 0.7 0.1 1.4 5.5
Biological sciences 2,418 60,861 10,602 19,505 6,833 451 90 506 639 0.7 0.8 2.6 9.4
Communication 200 6,661 3,167 75 31 61 85 2 0 0.9 2.7 2.7 0.0
Computer sciences 470 43,937 16,992 831 445 178 65 31 36 0.4 0.4 3.7 8.1
Earth, atmospheric, and ocean sciences 436 11,990 2,645 2,049 1,498 32 23 33 276 0.3 0.9 1.6 18.4
Family and consumer sciences and human sciences 105 2,347 1,414 114 59 11 1 6 1 0.5 0.1 5.3 1.7
Mathematics and statistics 461 19,537 4,105 956 221 15 5 30 23 0.1 0.1 3.1 10.4
Multidisciplinary and interdisciplinary studies 396 4,291 1,790 1,044 658 134 219 6 141 3.1 12.2 0.6 21.4
Neurobiology and neuroscience 193 4,665 186 1,876 665 44 0 24 57 0.9 0.0 1.3 8.6
Physical sciences 685 35,762 3,553 7,241 2,432 49 88 204 117 0.1 2.5 2.8 4.8
Psychology 660 28,322 9,391 1,060 410 650 293 45 18 2.3 3.1 4.2 4.4
Social sciences 1,852 64,564 25,222 1,050 767 1,578 619 45 75 2.4 2.5 4.3 9.8
Engineering 1,906 119,763 36,595 7,301 2,736 693 329 119 252 0.6 0.9 1.6 9.2
Aerospace engineering 62 3,856 1,169 220 43 0 0 8 0 0.0 0.0 3.6 0.0
Agricultural engineering 41 1,412 328 150 55 0 0 0 3 0.0 0.0 0.0 5.5
Architecture 51 1,568 221 14 5 0 0 0 2 0.0 0.0 0.0 40.0
Biomedical engineering 154 8,246 1,128 1,196 322 132 13 11 32 1.6 1.2 0.9 9.9
Chemical engineering 149 8,587 1,193 1,244 276 0 0 2 29 0.0 0.0 0.2 10.5
Civil engineering 257 14,660 4,771 628 310 17 9 10 30 0.1 0.2 1.6 9.7
Electrical engineering 301 37,406 10,840 1,179 459 408 213 33 35 1.1 2.0 2.8 7.6
Engineering science, mechanics, and physics 61 1,541 582 270 192 0 0 1 11 0.0 0.0 0.4 5.7
Industrial and manufacturing engineering 155 8,573 5,386 131 90 0 0 7 23 0.0 0.0 5.3 25.6
Mechanical engineering 216 18,488 6,020 1,055 438 30 77 15 63 0.2 1.3 1.4 14.4
Metallurgical and materials engineering 156 6,603 856 780 273 104 5 4 9 1.6 0.6 0.5 3.3
Mining engineering 20 307 89 15 8 0 0 0 0 0.0 0.0 0.0 0.0
Nuclear engineering 29 1,201 266 112 34 0 0 1 2 0.0 0.0 0.9 5.9
Petroleum engineering 22 1,662 394 66 63 0 0 0 0 0.0 0.0 0.0 0.0
Engineering nec 232 5,653 3,352 241 168 2 12 27 13 0.0 0.4 11.2 7.7
Health 2,869 38,592 15,931 18,950 6,274 582 411 985 621 1.5 2.6 5.2 9.9
Clinical medicine 1,978 15,706 7,889 16,208 5,096 184 325 844 527 1.2 4.1 5.2 10.3
Other health 891 22,886 8,042 2,742 1,178 398 86 141 94 1.7 1.1 5.1 8.0
Fall 2014old, all surveyed fieldsa 12,985 451,884 136,716 62,259 23,235 4,524 2,074 2,049 2,290 1.0 1.5 3.3 9.9
Science and engineering 10,136 412,683 120,243 43,364 16,980 3,942 1,798 1,064 1,669 1.0 1.5 2.5 9.8
Science 8,252 294,413 84,023 36,076 14,245 3,269 1,469 950 1,417 1.1 1.7 2.6 9.9
Agricultural sciences 484 11,463 4,512 1,387 606 75 4 19 34 0.7 0.1 1.4 5.6
Biological sciences 2,388 60,212 10,490 18,705 6,484 451 90 506 639 0.7 0.9 2.7 9.9
Communication 194 6,552 3,140 75 31 61 85 2 0 0.9 2.7 2.7 0.0
Computer sciences 451 42,254 16,224 830 445 178 65 31 36 0.4 0.4 3.7 8.1
Earth, atmospheric, and ocean sciences 432 11,966 2,545 2,049 1,498 23 0 33 276 0.2 0.0 1.6 18.4
Family and consumer sciences and human sciences 104 2,347 1,414 93 57 11 1 6 1 0.5 0.1 6.5 1.8
Mathematics and statistics 455 19,475 3,990 953 221 15 5 30 23 0.1 0.1 3.1 10.4
Multidisciplinary and interdisciplinary studies 391 4,009 1,790 1,044 658 134 219 6 141 3.3 12.2 0.6 21.4
Neurobiology and neuroscience 190 4,665 186 1,776 649 44 0 24 57 0.9 0.0 1.4 8.8
Physical sciences 680 35,688 3,536 7,058 2,420 49 88 204 117 0.1 2.5 2.9 4.8
Psychology 649 30,884 10,194 1,057 410 650 293 44 18 2.1 2.9 4.2 4.4
Social sciences 1,834 64,898 26,002 1,049 766 1,578 619 45 75 2.4 2.4 4.3 9.8
Engineering 1,884 118,270 36,220 7,288 2,735 673 329 114 252 0.6 0.9 1.6 9.2
Aerospace engineering 62 3,856 1,169 220 43 0 0 8 0 0.0 0.0 3.6 0.0
Agricultural engineering 40 1,389 328 146 55 0 0 0 3 0.0 0.0 0.0 5.5
Architecture 50 1,565 221 14 5 0 0 0 2 0.0 0.0 0.0 40.0
Biomedical engineering 154 8,246 1,128 1,196 322 132 13 11 32 1.6 1.2 0.9 9.9
Chemical engineering 148 8,580 1,183 1,244 276 0 0 2 29 0.0 0.0 0.2 10.5
Civil engineering 256 14,651 4,766 628 310 17 9 10 30 0.1 0.2 1.6 9.7
Electrical engineering 290 36,044 10,490 1,177 459 408 213 32 35 1.1 2.0 2.7 7.6
Engineering science, mechanics, and physics 61 1,541 582 270 192 0 0 1 11 0.0 0.0 0.4 5.7
Industrial and manufacturing engineering 155 8,573 5,386 131 90 0 0 7 23 0.0 0.0 5.3 25.6
Mechanical engineering 213 18,440 6,014 1,052 437 30 77 15 63 0.2 1.3 1.4 14.4
Metallurgical and materials engineering 152 6,562 852 776 273 84 5 0 9 1.3 0.6 0.0 3.3
Mining engineering 20 307 89 15 8 0 0 0 0 0.0 0.0 0.0 0.0
Nuclear engineering 29 1,201 266 112 34 0 0 1 2 0.0 0.0 0.9 5.9
Petroleum engineering 22 1,662 394 66 63 0 0 0 0 0.0 0.0 0.0 0.0
Engineering nec 232 5,653 3,352 241 168 2 12 27 13 0.0 0.4 11.2 7.7
Health 2,849 39,201 16,473 18,895 6,255 582 276 985 621 1.5 1.7 5.2 9.9
Clinical medicine 1,973 16,425 8,526 16,160 5,082 184 190 844 527 1.1 2.2 5.2 10.4
Other health 876 22,776 7,947 2,735 1,173 398 86 141 94 1.7 1.1 5.2 8.0
Fall 2013, all surveyed fields 12,607 439,950 134,054 61,824 22,397 5,424 1,755 2,440 2,103 1.2 1.3 3.9 9.4
Science and engineering 9,905 400,213 118,675 43,283 16,365 4,916 1,611 1,286 1,314 1.2 1.4 3.0 8.0
Science 8,049 288,494 83,619 36,179 13,880 3,601 947 1,114 1,099 1.2 1.1 3.1 7.9
Agricultural sciences 465 11,034 4,366 1,311 544 0 0 22 21 0.0 0.0 1.7 3.9
Biological sciences 2,353 60,848 10,339 19,311 6,515 779 134 639 407 1.3 1.3 3.3 6.2
Communication 193 6,383 2,839 76 34 15 0 2 3 0.2 0.0 2.6 8.8
Computer sciences 434 35,297 14,428 761 458 709 298 26 23 2.0 2.1 3.4 5.0
Earth, atmospheric, and ocean sciences 419 11,943 2,963 2,023 1,509 416 99 68 297 3.5 3.3 3.4 19.7
Family and consumer sciences and human sciences 102 2,347 1,297 90 43 0 0 0 0 0.0 0.0 0.0 0.0
Mathematics and statistics 444 18,696 4,092 931 224 152 36 26 26 0.8 0.9 2.8 11.6
Multidisciplinary and interdisciplinary studies 348 3,690 1,702 889 537 0 0 0 125 0.0 0.0 0.0 23.3
Neurobiology and neuroscience 184 4,575 185 1,693 417 0 0 45 25 0.0 0.0 2.7 6.0
Physical sciences 673 35,424 3,520 7,157 2,302 137 2 211 97 0.4 0.1 2.9 4.2
Psychology 642 32,194 11,085 1,000 448 219 58 42 19 0.7 0.5 4.2 4.2
Social sciences 1,792 66,063 26,803 937 849 1,174 320 33 56 1.8 1.2 3.5 6.6
Engineering 1,856 111,719 35,056 7,104 2,485 1,315 664 172 215 1.2 1.9 2.4 8.7
Aerospace engineering 64 3,857 1,244 202 40 130 73 8 0 3.4 5.9 4.0 0.0
Agricultural engineering 42 1,256 386 152 50 0 0 0 2 0.0 0.0 0.0 4.0
Architecture 55 1,919 231 17 10 98 8 0 6 5.1 3.5 0.0 60.0
Biomedical engineering 146 8,015 1,043 1,103 238 1 0 3 32 0.0 0.0 0.3 13.4
Chemical engineering 147 8,490 1,129 1,230 264 0 0 25 28 0.0 0.0 2.0 10.6
Civil engineering 254 14,300 4,687 587 295 84 42 11 20 0.6 0.9 1.9 6.8
Electrical engineering 283 33,246 9,972 1,180 429 298 145 30 21 0.9 1.5 2.5 4.9
Engineering science, mechanics, and physics 59 1,540 540 240 157 41 25 12 13 2.7 4.6 5.0 8.3
Industrial and manufacturing engineering 163 7,971 5,626 133 77 481 276 4 22 6.0 4.9 3.0 28.6
Mechanical engineering 211 17,599 5,602 1,032 403 156 81 48 50 0.9 1.4 4.7 12.4
Metallurgical and materials engineering 146 6,220 857 809 267 26 14 0 7 0.4 1.6 0.0 2.6
Mining engineering 19 265 90 7 10 0 0 0 0 0.0 0.0 0.0 0.0
Nuclear engineering 28 1,169 290 105 27 0 0 1 1 0.0 0.0 1.0 3.7
Petroleum engineering 19 1,315 290 49 40 0 0 0 0 0.0 0.0 0.0 0.0
Engineering nec 220 4,557 3,069 258 178 0 0 30 13 0.0 0.0 11.6 7.3
Health 2,702 39,737 15,379 18,541 6,032 508 144 1,154 789 1.3 0.9 6.2 13.1
Clinical medicine 1,856 16,610 8,011 15,828 4,983 52 32 1,001 719 0.3 0.4 6.3 14.4
Other health 846 23,127 7,368 2,713 1,049 456 112 153 70 2.0 1.5 5.6 6.7
nec = not elsewhere classified.
a In 2014, the survey frame was updated following a comprehensive frame evaluation study. The study identified potentially eligible but not previously surveyed academic institutions in the United States with master's- or doctorate-granting programs in science, engineering, or health. A total of 151 newly eligible institutions were added, and two private for-profit institutions offering mostly practitioner-based graduate degrees were determined to be ineligible.
SOURCE: National Science Foundation, National Center for Science and Engineering Statistics, Survey of Graduate Students and Postdoctorates in Science and Engineering.