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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Social Sciences and Humanities 83 300 254 135 114 194 34987

Philip J. Leaf publications per year

The chart shows the history of publications by Philip J. Leaf between 1977 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Philip J. Leaf published across 49 years, from 1977 to 2025, averaging 4.1 papers a year. Output peaked at 11 publications in 2008. 1 of the 202 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1977 to 2025. Vertical axis: number of publications, 0 to 11. Peak 11 publications in 2008. 1977: 2 publications 1978: 1 publication 1979: 0 publications 1980: 0 publications 1981: 1 publication 1982: 0 publications 1983: 0 publications 1984: 4 publications 1985: 9 publications 1986: 2 publications 1987: 5 publications 1988: 6 publications 1989: 7 publications 1990: 2 publications 1991: 1 publication 1992: 5 publications 1993: 4 publications 1994: 3 publications 1995: 5 publications 1996: 6 publications 1997: 5 publications 1998: 5 publications 1999: 6 publications 2000: 4 publications 2001: 7 publications 2002: 4 publications 2003: 7 publications 2004: 6 publications 2005: 2 publications 2006: 3 publications 2007: 4 publications 2008: 11 publications 2009: 11 publications 2010: 10 publications 2011: 3 publications 2012: 9 publications 2013: 5 publications 2014: 8 publications 2015: 6 publications 2016: 4 publications 2017: 2 publications 2018: 4 publications 2019: 5 publications 2020: 4 publications 2021: 2 publications 2022: 0 publications 2023: 1 publication 2024: 0 publications 2025: 1 publication
1977 2025

202 publications in total across all disciplines

View publications per year as a table
Philip J. Leaf: publications per year, 1977 to 2025
Year Publications
1977 2
1978 1
1979 0
1980 0
1981 1
1982 0
1983 0
1984 4
1985 9
1986 2
1987 5
1988 6
1989 7
1990 2
1991 1
1992 5
1993 4
1994 3
1995 5
1996 6
1997 5
1998 5
1999 6
2000 4
2001 7
2002 4
2003 7
2004 6
2005 2
2006 3
2007 4
2008 11
2009 11
2010 10
2011 3
2012 9
2013 5
2014 8
2015 6
2016 4
2017 2
2018 4
2019 5
2020 4
2021 2
2022 0
2023 1
2024 0
2025 1
Total 202
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Philip J. Leaf publications per year - data summary

  • Philip J. Leaf, a Social Sciences and Humanities scholar from Johns Hopkins University, has 202 publications recorded across 49 years, from 1977 to 2025.
  • The oldest publication on record dates to 1977 and the most recent to 2025.
  • The most productive years are 2008 and 2009, with 11 publications each.
  • The least productive years with any output are 1978, 1981, 1991, 2023 and others, with 1 publication each.
  • 6 of the 49 years in the span carry no publications at all (1979, 1980, 1982, 1983 and others).
  • The rate of publication averages 4.1 papers per year over the whole span, or 4.7 per year counting only the 43 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 4 publications, 2% of the career total.
  • Split into equal eras - 1977-1993: 49 publications (2.9 per year); 1994-2010: 99 publications (5.8 per year); 2011-2025: 54 publications (3.6 per year).
  • Comparing the opening and closing eras, the overall trend of publication is broadly steady.

Philip J. Leaf publication distribution in Social Sciences and Humanities in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Social Sciences and Humanities in 2026. The highlighted bar marks where Philip J. Leaf sits on this spectrum.

No. of scientists
100 200 300 400
Bar chart with 54 bars. Horizontal axis: publications, 44–53 to 570+. Vertical axis: number of scientists, 0 to 474. Most scientists, 474, have 114–123 publications. The last bar groups every scientist with 570 publications or more. The highlighted bar, 194–203 publications, is where this scientist sits. 44–53 publications: 28 scientists 54–63 publications: 61 scientists 64–73 publications: 161 scientists 74–83 publications: 225 scientists 84–93 publications: 301 scientists 94–103 publications: 390 scientists 104–113 publications: 406 scientists 114–123 publications: 474 scientists 124–133 publications: 453 scientists 134–143 publications: 434 scientists 144–153 publications: 407 scientists 154–163 publications: 411 scientists 164–173 publications: 391 scientists 174–183 publications: 313 scientists 184–193 publications: 319 scientists 194–203 publications: 304 scientists 204–213 publications: 285 scientists 214–223 publications: 246 scientists 224–233 publications: 213 scientists 234–243 publications: 170 scientists 244–253 publications: 167 scientists 254–263 publications: 162 scientists 264–273 publications: 138 scientists 274–283 publications: 138 scientists 284–293 publications: 113 scientists 294–303 publications: 106 scientists 304–313 publications: 95 scientists 314–323 publications: 101 scientists 324–333 publications: 81 scientists 334–343 publications: 69 scientists 344–353 publications: 56 scientists 354–363 publications: 36 scientists 364–373 publications: 42 scientists 374–383 publications: 41 scientists 384–393 publications: 44 scientists 394–403 publications: 27 scientists 404–413 publications: 30 scientists 414–423 publications: 20 scientists 424–433 publications: 29 scientists 434–443 publications: 29 scientists 444–453 publications: 25 scientists 454–463 publications: 19 scientists 464–473 publications: 21 scientists 474–483 publications: 11 scientists 484–493 publications: 17 scientists 494–503 publications: 7 scientists 504–513 publications: 6 scientists 514–523 publications: 12 scientists 524–533 publications: 10 scientists 534–543 publications: 7 scientists 544–553 publications: 6 scientists 554–563 publications: 12 scientists 564–569 publications: 8 scientists 570+ publications: 100 scientists
44–53 publications 570+

This scientist: 194 publications — 62nd percentile

62% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 570 publications or more.

View publications distribution as a table
Number of Social Sciences and Humanities scientists by publication count, Research.com 2026 ranking edition. Based on 7,777 ranked scientists.
Publications Scientists This scientist
44–53 28
54–63 61
64–73 161
74–83 225
84–93 301
94–103 390
104–113 406
114–123 474
124–133 453
134–143 434
144–153 407
154–163 411
164–173 391
174–183 313
184–193 319
194–203 304 194
204–213 285
214–223 246
224–233 213
234–243 170
244–253 167
254–263 162
264–273 138
274–283 138
284–293 113
294–303 106
304–313 95
314–323 101
324–333 81
334–343 69
344–353 56
354–363 36
364–373 42
374–383 41
384–393 44
394–403 27
404–413 30
414–423 20
424–433 29
434–443 29
444–453 25
454–463 19
464–473 21
474–483 11
484–493 17
494–503 7
504–513 6
514–523 12
524–533 10
534–543 7
544–553 6
554–563 12
564–569 8
570+ 100
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Philip J. Leaf publication distribution in Social Sciences and Humanities in 2026 - data summary

  • The chart plots the publication count of all 7,777 Social Sciences and Humanities scientists ranked by Research.com in 2026, grouped into 54 ranges running from 44–53 to 570+ publications.
  • Philip J. Leaf, a Social Sciences and Humanities scholar from Johns Hopkins University, records 194 publications - the 62nd percentile of the discipline.
  • 62% of ranked Social Sciences and Humanities scientists score the same or lower than Philip J. Leaf, and about 38% score higher.
  • The median of the discipline falls in the 164–173 publications range, and Philip J. Leaf ranks above the median.
  • The most crowded range is 114–123 publications, holding 474 scientists (6% of the field).
  • 57% of the field sits in the lowest quarter of the value range (up to 174–183 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 570 publications or more, 100 scientists in all (1% of the field).

Philip J. Leaf D-index placement in Social Sciences and Humanities in 2026

The chart shows the D-index (discipline H-index) distribution of Social Sciences and Humanities scientists ranked by Research.com in 2026. The highlighted bar marks where Philip J. Leaf sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 71 bars. Horizontal axis: D-Index, 30 to 100+. Vertical axis: number of scientists, 0 to 313. Most scientists, 313, have 42 D-Index. The last bar groups every scientist with 100 D-Index or more. The highlighted bar, 83 D-Index, is where this scientist sits. 30 D-Index: 177 scientists 31 D-Index: 210 scientists 32 D-Index: 222 scientists 33 D-Index: 188 scientists 34 D-Index: 181 scientists 35 D-Index: 243 scientists 36 D-Index: 261 scientists 37 D-Index: 272 scientists 38 D-Index: 278 scientists 39 D-Index: 300 scientists 40 D-Index: 297 scientists 41 D-Index: 308 scientists 42 D-Index: 313 scientists 43 D-Index: 300 scientists 44 D-Index: 269 scientists 45 D-Index: 260 scientists 46 D-Index: 228 scientists 47 D-Index: 251 scientists 48 D-Index: 203 scientists 49 D-Index: 186 scientists 50 D-Index: 187 scientists 51 D-Index: 166 scientists 52 D-Index: 138 scientists 53 D-Index: 141 scientists 54 D-Index: 131 scientists 55 D-Index: 137 scientists 56 D-Index: 109 scientists 57 D-Index: 129 scientists 58 D-Index: 95 scientists 59 D-Index: 105 scientists 60 D-Index: 106 scientists 61 D-Index: 86 scientists 62 D-Index: 94 scientists 63 D-Index: 77 scientists 64 D-Index: 79 scientists 65 D-Index: 59 scientists 66 D-Index: 68 scientists 67 D-Index: 51 scientists 68 D-Index: 49 scientists 69 D-Index: 40 scientists 70 D-Index: 43 scientists 71 D-Index: 40 scientists 72 D-Index: 50 scientists 73 D-Index: 46 scientists 74 D-Index: 43 scientists 75 D-Index: 45 scientists 76 D-Index: 45 scientists 77 D-Index: 30 scientists 78 D-Index: 25 scientists 79 D-Index: 31 scientists 80 D-Index: 29 scientists 81 D-Index: 18 scientists 82 D-Index: 21 scientists 83 D-Index: 26 scientists 84 D-Index: 15 scientists 85 D-Index: 15 scientists 86 D-Index: 19 scientists 87 D-Index: 19 scientists 88 D-Index: 12 scientists 89 D-Index: 7 scientists 90 D-Index: 19 scientists 91 D-Index: 20 scientists 92 D-Index: 13 scientists 93 D-Index: 9 scientists 94 D-Index: 13 scientists 95 D-Index: 8 scientists 96 D-Index: 7 scientists 97 D-Index: 6 scientists 98 D-Index: 6 scientists 99 D-Index: 6 scientists 100+ D-Index: 97 scientists
30 D-Index 100+

This scientist: 83 D-Index — 96th percentile

96% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 100 D-Index or more.

View D-Index distribution as a table
Number of Social Sciences and Humanities scientists by D-index, Research.com 2026 ranking edition. Based on 7,777 ranked scientists.
D-Index Scientists This scientist
30 177
31 210
32 222
33 188
34 181
35 243
36 261
37 272
38 278
39 300
40 297
41 308
42 313
43 300
44 269
45 260
46 228
47 251
48 203
49 186
50 187
51 166
52 138
53 141
54 131
55 137
56 109
57 129
58 95
59 105
60 106
61 86
62 94
63 77
64 79
65 59
66 68
67 51
68 49
69 40
70 43
71 40
72 50
73 46
74 43
75 45
76 45
77 30
78 25
79 31
80 29
81 18
82 21
83 26 83
84 15
85 15
86 19
87 19
88 12
89 7
90 19
91 20
92 13
93 9
94 13
95 8
96 7
97 6
98 6
99 6
100+ 97
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Philip J. Leaf D-index placement in Social Sciences and Humanities in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 7,777 Social Sciences and Humanities scientists ranked by Research.com in 2026, grouped into 71 ranges running from 30 to 100+ D-Index.
  • Philip J. Leaf, a Social Sciences and Humanities scholar from Johns Hopkins University, records 83 D-Index - the 96th percentile of the discipline.
  • 96% of ranked Social Sciences and Humanities scientists score the same or lower than Philip J. Leaf, and about 4% score higher.
  • The median of the discipline falls in the 45 D-Index range, and Philip J. Leaf ranks above the median.
  • The most crowded range is 42 D-Index, holding 313 scientists (4% of the field).
  • 59% of the field sits in the lowest quarter of the value range (up to 47 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 100 D-Index or more, 97 scientists in all (1% of the field).

Overview

Philip J. Leaf is affiliated with Johns Hopkins University in the United States. Their research spans several areas within social sciences and medicine, with a focus on topics such as terrorism, counterterrorism, political violence, suicide and self-harm studies, gun ownership and violence research, smoking behavior and cessation, substance abuse treatment and outcomes, alcohol consumption and health effects, and healthcare professionals' stress and burnout.

Their recent publications include:

  • Second Victims: Aftermath of Gun Violence and Faith-Based Responses (2020, Journal of Religion and Health)
  • Using Zoning as a Public Health Tool to Reduce Alcohol Outlet Oversaturation, Promote Compliance, and Guide Future Enforcement: a Preliminary Analysis of Transform Baltimore (2020, Journal of Urban Health)
  • The use of propensity scores to assess the generalizability of results from randomized trials (2020, UNC Libraries)
  • Health Care Workers and Burnout: A Cross-Sectional Study (2025, AJN American Journal of Nursing)

Philip J. Leaf has collaborated with several frequent co-authors, including Panagis Galiatsatos, Thomas Cudjoe, Jerrell Bratcher, Peter Heikkinen, and Sherita Hill Golden.

Their work has been published primarily in the following venues:

  • Journal of Religion and Health
  • Journal of Urban Health
  • UNC Libraries
  • AJN American Journal of Nursing

The main fields of study they contribute to are social sciences and medicine, with subfields including sociology and political science, clinical psychology, health, physiology, and epidemiology.

Philip J. Leaf's research addresses a broad range of public health and social issues, often focusing on the intersections of health outcomes and societal factors. Subjects such as violence, addiction, mental health, and stress among healthcare professionals are recurrent elements in their academic output.

Best Publications

  • Multiple Imputation by Chained Equations: What is it and how does it work?

    Melissa J. Azur;Elizabeth A. Stuart;Constantine Frangakis;Philip J. Leaf

  • The epidemiology of co-occurring addictive and mental disorders: implications for prevention and service utilization.

    Ronald C. Kessler;M.P.H. Christopher B. Nelson Ph.D.;Katherine A. McGonagle;J B S Mark Edlund

  • Examining the Overlap in Internet Harassment and School Bullying: Implications for School Intervention

    Michele L. Ybarra;Marie Diener-West;Philip J. Leaf

  • Examining the Effects of Schoolwide Positive Behavioral Interventions and Supports on Student Outcomes: Results from a Randomized Controlled Effectiveness Trial in Elementary Schools.

    Catherine P. Bradshaw;Mary M. Mitchell;Philip J. Leaf

  • Affective disorders in five United States communities.

    Myrna M. Weissman;Philip J. Leaf;Gary L. Tischler;Dan G. Blazer

  • Feasibility and preliminary outcomes of a school-based mindfulness intervention for urban youth

    Tamar Mendelson;Mark T. Greenberg;Jacinda K. Dariotis;Laura Feagans Gould

  • Maximizing the Implementation Quality of Evidence-Based Preventive Interventions in Schools: A Conceptual Framework

    Celene E. Domitrovich;Catherine P. Bradshaw;Jeanne M. Poduska;Kimberly Hoagwood

  • A Multilevel Study of Predictors of Student Perceptions of School Climate: The Effect of Classroom-Level Factors

    Christine W. Koth;Catherine P. Bradshaw;Philip J. Leaf

  • Mental health service use in the community and schools: Results from the four-community MECA study

    Philip J. Leaf;Margarita Alegria;Patricia Cohen;Sherryl H. Goodman

  • Barriers to children's mental health services.

    Pamela L. Owens;Kimberly Hoagwood;Sarah M. Horwitz;Philip J. Leaf

  • Altering school climate through school-wide Positive Behavioral Interventions and Supports: findings from a group-randomized effectiveness trial.

    Catherine Pilcher Bradshaw;Christine W. Koth;Leslie A. Thornton;Philip J. Leaf

  • Past-Year Use of Outpatient Services for Psychiatric Problems in the National Comorbidity Survey

    Ronald C. Kessler;Shanyang Zhao;Steven J. Katz;Anthony C. Kouzis

  • The impact of school-wide positive behavioral interventions and supports (PBIS) on the organizational health of elementary schools.

    Catherine P. Bradshaw;Christine W. Koth;Katherine B. Bevans;Nicholas Ialongo

  • Poverty and Psychiatric Status: Longitudinal Evidence From the New Haven Epidemiologic Catchment Area Study

    Martha Livingston Bruce;David T. Takeuchi;Philip J. Leaf

  • Effects of School-Wide Positive Behavioral Interventions and Supports on Child Behavior Problems

    Catherine Pilcher Bradshaw;Tracy Evian Waasdorp;Philip J. Leaf

  • Multilevel Exploration of Factors Contributing to the Overrepresentation of Black Students in Office Disciplinary Referrals

    Catherine P. Bradshaw;Mary M. Mitchell;Lindsey M. O'Brennan;Philip J. Leaf

  • The use of propensity scores to assess the generalizability of results from randomized trials

    Elizabeth A. Stuart;Stephen R. Cole;Catherine P. Bradshaw;Philip J. Leaf

  • Racial differences in attitudes toward professional mental health care and in the use of services

    M.P.H. Chamberlain Diala Ph.D.;Carles Muntaner M.D.;Christine Walrath;Kim J. Nickerson

  • Student and Teacher Perceptions of School Climate: A Multilevel Exploration of Patterns of Discrepancy

    Mary M. Mitchell;Catherine P. Bradshaw;Philip J. Leaf

  • Implementation of School-Wide Positive Behavioral Interventions and Supports (PBIS) in Elementary Schools: Observations from a Randomized Trial

    Catherine Pilcher Bradshaw;Wendy M. Reinke;Louis D. Brown;Katherine B. Bevans

  • Mental health in pediatric settings: distribution of disorders and factors related to service use.

    Margaret J. Briggs-Gowan;Sarah Mc Cue Horwitz;Mary E. Schwab-Stone;John M. Leventhal

Frequent Co-Authors

Catherine P. Bradshaw
Catherine P. Bradshaw University of Virginia
Sarah M. Horwitz
Sarah M. Horwitz New York University
Nicholas S. Ialongo
Nicholas S. Ialongo Johns Hopkins University
Michele L. Ybarra
Michele L. Ybarra Johns Hopkins University
Darrel A. Regier
Darrel A. Regier University of British Columbia
Elizabeth A. Stuart
Elizabeth A. Stuart Johns Hopkins University
Tracy Evian Waasdorp
Tracy Evian Waasdorp Children's Hospital of Philadelphia
Ronald C. Kessler
Ronald C. Kessler Harvard University
Richard G. Frank
Richard G. Frank Harvard University
Sherryl H. Goodman
Sherryl H. Goodman Emory University

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