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Table A-7. Imputation for nonresponse in doctorate-granting institutions, by field and graduate enrollment or postdoctoral status: 2011–13
  Total in survey Number imputed Imputation rate (%)
Year and field Organizational
units in
universe
Full-time
student
Part-time
student
Post-
doctorate
Full-time
student
Part-time
student
Post-
doctorate
Full-time
student
Part-time
student
Post-
doctorate
Fall 2013, all surveyed fields 12,607 439,950 134,054 61,824 5,424 1,755 2,440 1.2 1.3 3.9
    Science and engineering 9,905 400,213 118,675 43,283 4,916 1,611 1,286 1.2 1.4 3.0
        Science 8,049 288,494 83,619 36,179 3,601 947 1,114 1.2 1.1 3.1
            Agricultural sciences 465 11,034 4,366 1,311 0 0 22 0.0 0.0 1.7
            Biological sciences 2,353 60,848 10,339 19,311 779 134 639 1.3 1.3 3.3
            Communication 193 6,383 2,839 76 15 0 2 0.2 0.0 2.6
            Computer sciences 434 35,297 14,428 761 709 298 26 2.0 2.1 3.4
            Earth, atmospheric, and ocean sciences 419 11,943 2,963 2,023 416 99 68 3.5 3.3 3.4
            Family and consumer sciences and human sciences 102 2,347 1,297 90 0 0 0 0.0 0.0 0.0
            Mathematical sciences 444 18,696 4,092 931 152 36 26 0.8 0.9 2.8
            Multidisciplinary and interdisciplinary studies 348 3,690 1,702 889 0 0 0 0.0 0.0 0.0
            Neuroscience 184 4,575 185 1,693 0 0 45 0.0 0.0 2.7
            Physical sciences 673 35,424 3,520 7,157 137 2 211 0.4 0.1 2.9
            Psychology 642 32,194 11,085 1,000 219 58 42 0.7 0.5 4.2
            Social sciences 1,792 66,063 26,803 937 1,174 320 33 1.8 1.2 3.5
        Engineering 1,856 111,719 35,056 7,104 1,315 664 172 1.2 1.9 2.4
            Aerospace engineering 64 3,857 1,244 202 130 73 8 3.4 5.9 4.0
            Agricultural engineering 42 1,256 386 152 0 0 0 0.0 0.0 0.0
            Architecture 55 1,919 231 17 98 8 0 5.1 3.5 0.0
            Biomedical engineering 146 8,015 1,043 1,103 1 0 3 0.0 0.0 0.3
            Chemical engineering 147 8,490 1,129 1,230 0 0 25 0.0 0.0 2.0
            Civil engineering 254 14,300 4,687 587 84 42 11 0.6 0.9 1.9
            Electrical engineering 283 33,246 9,972 1,180 298 145 30 0.9 1.5 2.5
            Engineering science 59 1,540 540 240 41 25 12 2.7 4.6 5.0
            Industrial engineering 163 7,971 5,626 133 481 276 4 6.0 4.9 3.0
            Mechanical engineering 211 17,599 5,602 1,032 156 81 48 0.9 1.4 4.7
            Metallurgical and materials engineering 146 6,220 857 809 26 14 0 0.4 1.6 0.0
            Mining engineering 19 265 90 7 0 0 0 0.0 0.0 0.0
            Nuclear engineering 28 1,169 290 105 0 0 1 0.0 0.0 1.0
            Petroleum engineering 19 1,315 290 49 0 0 0 0.0 0.0 0.0
            Engineering nec 220 4,557 3,069 258 0 0 30 0.0 0.0 11.6
    Health 2,702 39,737 15,379 18,541 508 144 1,154 1.3 0.9 6.2
        Clinical medicine 1,856 16,610 8,011 15,828 52 32 1,001 0.3 0.4 6.3
        Other health 846 23,127 7,368 2,713 456 112 153 2.0 1.5 5.6

Fall 2012, all surveyed fields
12,567 433,177 138,401 62,764 4,659 2,073 2,598 1.1 1.5 4.1
    Science and engineering 9,857 392,563 120,643 43,765 3,980 1,866 1,592 1.0 1.5 3.6
        Science 7,999 285,611 85,262 36,667 2,851 1,232 1,295 1.0 1.4 3.5
            Agricultural sciences 462 10,815 4,411 1,285 2 0 26 0.0 0.0 2.0
            Biological sciences 2,352 61,061 9,935 20,065 589 48 698 1.0 0.5 3.5
            Communication 186 6,175 2,756 58 0 0 4 0.0 0.0 6.9
            Computer sciences 442 31,739 14,808 757 586 352 17 1.8 2.4 2.2
            Earth, atmospheric, and ocean sciences 416 12,199 2,970 1,947 174 103 92 1.4 3.5 4.7
            Family and consumer sciences and human sciences 95 2,169 1,419 58 0 0 3 0.0 0.0 5.2
            Mathematical sciences 451 18,192 4,387 900 120 77 47 0.7 1.8 5.2
            Multidisciplinary and interdisciplinary studies 340 3,807 1,743 741 76 1 3 2.0 0.1 0.4
            Neuroscience 165 4,333 214 1,524 0 0 27 0.0 0.0 1.8
            Physical sciences 679 35,282 3,555 7,408 28 10 270 0.1 0.3 3.6
            Psychology 663 32,830 11,622 1,126 262 69 93 0.8 0.6 8.3
            Social sciences 1,748 67,009 27,442 798 1,014 572 15 1.5 2.1 1.9
        Engineering 1,858 106,952 35,381 7,098 1,129 634 297 1.1 1.8 4.2
            Aerospace engineering 61 3,767 1,219 170 138 77 6 3.7 6.3 3.5
            Agricultural engineering 41 1,250 294 133 0 0 6 0.0 0.0 4.5
            Architecture 55 2,037 303 6 0 0 1 0.0 0.0 16.7
            Biomedical engineering 141 7,931 1,154 1,161 0 0 11 0.0 0.0 0.9
            Chemical engineering 148 8,014 1,128 1,098 0 0 27 0.0 0.0 2.5
            Civil engineering 253 14,117 4,693 589 0 0 19 0.0 0.0 3.2
            Electrical engineering 285 30,528 9,862 1,152 306 153 47 1.0 1.6 4.1
            Engineering science 61 1,673 500 292 43 24 0 2.6 4.8 0.0
            Industrial engineering 163 7,744 5,831 127 476 286 1 6.1 4.9 0.8
            Mechanical engineering 212 16,701 5,527 983 140 80 89 0.8 1.4 9.1
            Metallurgical and materials engineering 144 6,088 829 852 26 14 26 0.4 1.7 3.1
            Mining engineering 18 240 115 5 0 0 1 0.0 0.0 20.0
            Nuclear engineering 28 1,162 351 120 0 0 9 0.0 0.0 7.5
            Petroleum engineering 19 1,287 233 53 0 0 0 0.0 0.0 0.0
            Engineering nec 229 4,413 3,342 357 0 0 54 0.0 0.0 15.1
    Health 2,710 40,614 17,758 18,999 679 207 1,006 1.7 1.2 5.3
        Clinical medicine 1,859 16,645 8,690 16,356 481 123 873 2.9 1.4 5.3
        Other health 851 23,969 9,068 2,643 198 84 133 0.8 0.9 5.0

Fall 2011, all surveyed fieldsa
12,419 430,623 139,911 62,545 6,804 3,147 2,940 1.6 2.2 4.7
    Science and engineering 9,685 388,995 122,764 44,035 5,622 2,868 2,018 1.4 2.3 4.6
        Science 7,862 283,914 87,919 37,255 4,115 2,169 1,513 1.4 2.5 4.1
            Agricultural sciences 456 10,889 4,189 1,254 10 0 0 0.1 0.0 0.0
            Biological sciences 2,306 59,764 9,922 21,082 597 87 826 1.0 0.9 3.9
            Communication 182 6,053 2,949 65 53 70 2 0.9 2.4 3.1
            Computer sciences 437 30,407 15,713 756 1,301 760 57 4.3 4.8 7.5
            Earth, atmospheric, and ocean sciences 409 11,973 2,914 1,767 290 377 27 2.4 12.9 1.5
            Family and consumer sciences and human sciences 95 2,348 1,442 52 0 0 0 0.0 0.0 0.0
            Mathematical sciences 452 17,587 4,380 828 352 111 84 2.0 2.5 10.1
            Multidisciplinary and interdisciplinary studies 313 3,790 1,995 704 79 29 11 2.1 1.5 1.6
            Neuroscience 163 3,909 179 1,398 36 0 46 0.9 0.0 3.3
            Physical sciences 669 35,056 3,600 7,459 277 51 375 0.8 1.4 5.0
            Psychology 659 33,496 12,112 1,117 659 333 79 2.0 2.7 7.1
            Social sciences 1,721 68,642 28,524 773 461 351 6 0.7 1.2 0.8
        Engineering 1,823 105,081 34,845 6,780 1,507 699 505 1.4 2.0 7.4
            Aerospace engineering 60 4,200 1,405 202 152 77 7 3.6 5.5 3.5
            Agricultural engineering 43 1,372 283 129 0 0 4 0.0 0.0 3.1
            Architecture 58 2,754 331 16 0 0 1 0.0 0.0 6.3
            Biomedical engineering 139 7,847 1,227 1,069 0 0 115 0.0 0.0 10.8
            Chemical engineering 146 7,594 1,147 1,137 94 0 65 1.2 0.0 5.7
            Civil engineering 248 13,898 4,630 551 47 30 15 0.3 0.6 2.7
            Electrical engineering 280 29,600 9,800 1,035 490 204 36 1.7 2.1 3.5
            Engineering science 56 1,545 509 280 43 25 138 2.8 4.9 49.3
            Industrial engineering 163 7,737 5,683 121 457 269 0 5.9 4.7 0.0
            Mechanical engineering 206 15,758 5,230 885 223 89 68 1.4 1.7 7.7
            Metallurgical and materials engineering 141 5,839 740 859 0 0 37 0.0 0.0 4.3
            Mining engineering 19 412 86 4 0 0 0 0.0 0.0 0.0
            Nuclear engineering 27 1,165 334 111 0 0 10 0.0 0.0 9.0
            Petroleum engineering 18 1,057 235 35 0 0 0 0.0 0.0 0.0
            Engineering nec 219 4,303 3,205 346 1 5 9 0.0 0.2 2.6
    Health 2,734 41,628 17,147 18,510 1,182 279 922 2.8 1.6 5.0
        Clinical medicine 1,888 17,315 8,043 16,161 430 149 830 2.5 1.9 5.1
        Other health 846 24,313 9,104 2,349 752 130 92 3.1 1.4 3.9

nec = not elsewhere classified.
a The 2011 postdoc data was reimputed following the 2012 data collection; these response statistics have been updated to reflect the reimputed data and supersede those contained in previous reports.
SOURCE: National Science Foundation, National Center for Science and Engineering Statistics, NSF-NIH Survey of Graduate Students and Postdoctorates in Science and Engineering.
Data from survey cycle Fall 2013, as of 8 August 2014.