James R. Simpson

4.0k total citations · 1 hit paper
78 papers, 2.5k citations indexed

About

James R. Simpson is a scholar working on Health, Toxicology and Mutagenesis, Global and Planetary Change and Plant Science. According to data from OpenAlex, James R. Simpson has authored 78 papers receiving a total of 2.5k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Health, Toxicology and Mutagenesis, 14 papers in Global and Planetary Change and 11 papers in Plant Science. Recurrent topics in James R. Simpson's work include Urban Green Space and Health (18 papers), Rangeland Management and Livestock Ecology (8 papers) and Plant responses to elevated CO2 (8 papers). James R. Simpson is often cited by papers focused on Urban Green Space and Health (18 papers), Rangeland Management and Livestock Ecology (8 papers) and Plant responses to elevated CO2 (8 papers). James R. Simpson collaborates with scholars based in United States, United Kingdom and China. James R. Simpson's co-authors include E. Gregory McPherson, Qingfu Xiao, Paula J. Peper, Q. Xiao, Chunxia Wu, Klaus Scott, S.E. Maco, Greg McPherson, David K. Powelson and Charles P. Gerba and has published in prestigious journals such as Applied and Environmental Microbiology, Journal of Business Ethics and Atmospheric Environment.

In The Last Decade

James R. Simpson

68 papers receiving 2.2k citations

Hit Papers

Benefits and costs of street trees in Lisbon, Portugal 2011 2026 2016 2021 2011 50 100 150
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Benefits and costs of street trees in Lisbon, Portugal
    2011 199 citations Ana Luísa Soares, Francisco Rego et al. Urban forestry & urban greening profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
James R. Simpson United States 23 1.2k 1.2k 966 488 290 78 2.5k
Cynnamon Dobbs Chile 26 1.6k 1.3× 1.6k 1.4× 598 0.6× 1.1k 2.2× 315 1.1× 67 3.3k
Rowan A. Rowntree United States 17 1.4k 1.1× 1.4k 1.2× 838 0.9× 539 1.1× 388 1.3× 32 2.3k
Timm Kroeger United States 23 896 0.7× 1.7k 1.5× 590 0.6× 331 0.7× 173 0.6× 40 2.9k
John E. Wagner United States 17 991 0.8× 1.2k 1.0× 601 0.6× 495 1.0× 203 0.7× 57 2.6k
Jarlath O’Neil‐Dunne United States 28 2.5k 2.0× 2.2k 1.9× 1.5k 1.5× 677 1.4× 397 1.4× 70 4.1k
Zander S. Venter Norway 24 1.9k 1.5× 1.9k 1.6× 1.2k 1.2× 562 1.2× 247 0.9× 49 3.9k
Pedro Pinho Portugal 30 935 0.8× 926 0.8× 489 0.5× 853 1.7× 374 1.3× 85 2.8k
Sonja Knapp Germany 28 1.3k 1.1× 1.9k 1.6× 666 0.7× 627 1.3× 1.0k 3.6× 43 3.5k
Cynthia Rosenzweig United States 13 626 0.5× 782 0.7× 827 0.9× 361 0.7× 52 0.2× 20 2.0k
Katalin Szlávecz United States 28 620 0.5× 1.1k 0.9× 385 0.4× 494 1.0× 463 1.6× 82 3.0k

Countries citing papers authored by James R. Simpson

Since Specialization
Citations

This map shows the geographic impact of James R. Simpson's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by James R. Simpson with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites James R. Simpson more than expected).

Fields of papers citing papers by James R. Simpson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James R. Simpson. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by James R. Simpson. The network helps show where James R. Simpson may publish in the future.

Co-authorship network of co-authors of James R. Simpson

This figure shows the co-authorship network connecting the top 25 collaborators of James R. Simpson. A scholar is included among the top collaborators of James R. Simpson based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with James R. Simpson. James R. Simpson is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Simpson, James R.. (2023). Why Dreaming Worlds aren’t Nearby Possible Worlds. The Philosophical Quarterly. 73(4). 1226–1243.
2.
Simpson, James R., et al.. (2022). More Clarity about Concessive Knowledge Attributions. Southwest Philosophy Review. 38(1). 59–69.
3.
Soares, Ana Luísa, Francisco Rego, E. Gregory McPherson, et al.. (2011). Benefits and costs of street trees in Lisbon, Portugal. Urban forestry & urban greening. 10(2). 69–78. 199 indexed citations breakdown →
4.
McPherson, E. Gregory, et al.. (2005). City of Charleston, South Carolina Municipal Forest Resource Analysis. 4 indexed citations
5.
Maco, S.E., E. Gregory McPherson, James R. Simpson, Paula J. Peper, & Q. Xiao. (2004). City of San Francisco, California street tree resource analysis. 6 indexed citations
6.
McPherson, E. Gregory & James R. Simpson. (2003). Potential energy savings in buildings by an urban tree planting programme in California. Urban forestry & urban greening. 2(2). 73–86. 150 indexed citations
7.
McPherson, E. Gregory, S.E. Maco, James R. Simpson, et al.. (2002). Western Washington and Oregon community tree guide : benefits, costs and strategic planting. The Journal of Physical Chemistry A. 128(1). 182–190. 18 indexed citations
8.
Landman, Drew, et al.. (2002). Use of Designed Experiments in Wind Tunnel Testing of Performance Automobiles. SAE technical papers on CD-ROM/SAE technical paper series. 1. 17 indexed citations
9.
McPherson, E. Gregory, James R. Simpson, Paula J. Peper, et al.. (2001). Tree Guidelines for Inland Empire Communities. 23 indexed citations
10.
McPherson, E. Gregory, James R. Simpson, Paula J. Peper, & Q. Xiao. (1999). Benefits-cost analysis of Modesto's municipal urban forest. 25(5). 235–248. 116 indexed citations
11.
Simpson, James R., et al.. (1997). Conservation of soil fertility under intensive maize cropping in semi-arid eastern Kenya. 3(1). 429–437. 6 indexed citations
12.
Simpson, James R. & E. Gregory McPherson. (1996). Potential of Tree Shade for Reducing Residential Energy Use in California. Arboriculture & Urban Forestry. 22(1). 10–18. 99 indexed citations
13.
Levitt, D. G., et al.. (1995). Water Use of Two Landscape Tree Species in Tucson, Arizona. Journal of the American Society for Horticultural Science. 120(3). 409–416. 31 indexed citations
14.
Simpson, James R., Xiang Cheng, & Akira Miyazaki. (1994). China's Livestock and Related Agriculture: Projections to 2025. Medical Entomology and Zoology. 36 indexed citations
15.
Simpson, James R. & J. H. Conrad. (1994). Central American animal agriculture in relation to natural resources. Agricultural Systems. 44(2). 143–161. 1 indexed citations
16.
Simpson, James R., et al.. (1990). Economics of zeranol in beef cattle production.. 25(2). 27–36. 1 indexed citations
17.
Braun, Rüdiger, Claus D. Buergelt, Ramon C. Littell, Stephen B. Linda, & James R. Simpson. (1990). Use of an enzyme-linked immunosorbent assay to estimate prevalence of paratuberculosis in cattle of Florida. Journal of the American Veterinary Medical Association. 196(8). 1251–1254. 40 indexed citations
18.
Simpson, James R., et al.. (1984). Use of an Economic Demographic Simulation Model of Planning in Zaire's Beef Cattle Subsector. Journal of African studies. 11(2). 74–82. 1 indexed citations
19.
Nixon, John F., et al.. (1975). AAE volume 7 issue 1 Cover and Front matter. Journal of Agricultural and Applied Economics. 7(1). f1–f6. 1 indexed citations
20.
Farris, Emmanuele, et al.. (1974). Natural and Applied Sciences. Latin American Research Review. 9(3). 103–111. 9 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Cynnamon Dobbs Breakdown of academic impact, for papers by Rowan A. Rowntree Breakdown of academic impact, for papers by Timm Kroeger Breakdown of academic impact, for papers by John E. Wagner Breakdown of academic impact, for papers by Jarlath O’Neil‐Dunne Breakdown of academic impact, for papers by Zander S. Venter Breakdown of academic impact, for papers by Pedro Pinho Breakdown of academic impact, for papers by Sonja Knapp Breakdown of academic impact, for papers by Cynthia Rosenzweig Breakdown of academic impact, for papers by Katalin Szlávecz
Rankless by CCL
2026