Global Impact Index

Since last meeeting

Kelly (despite being busy with interviews) is pulling data for barrow faculty, H-index top 5

Kelly is double check citation data on existing authors we have

Meeting with grad school stats/research mentor

Additional figures created

Possible target journal https://journals.plos.org/globalpublichealth/s/submission-guidelines

Introduction

The hallmarks of globalization include increased exchanges of goods and services, cross border flow of capital, migration, and increased exchanges of ideas. An objective measure of the global impact of scholarly work has important applications including promoting social science research into technology diffusion. In addition, the conscientious academic scientist could use this measure for the purposes of self-assessment, academic promotion, and guiding their scientific activities to promote global idea transfer. The H-index, R-index, h2 index, i10 index, and dissemination index are author level metrics designed to assess an authors’ overall scientific impact. However, in the age of increasing globalization, new methods may be valuable to understand not only overall research impact, but also specifically the impact of research across borders.The objective of this study was to develop a framework to understand and quantify the global impact of scientific publications by examining cross-border citations of academic journal publications.

Methods

We accessed the PubMed Application Programming Interface to obtain publication and citation data for English-language peer reviewed scientific publications. An author sample was subsequently obtained using Oracle SQL Developer, and data analyses was performed using R Analytics.

For each author examined, we determined the number of scholarly articles published and the number of cross border citations for each article. We developed an author level global impact index using these cross border citations. This new index is analogous to the widely used h-index, such that an author’s global impact index is equal to the number of published peer-reviewed scientific manuscripts with at least that number of cross border citations. Global heat maps for each author were also generated.

Data extraction and processing

Kelly pulled publication data for one author (includes all publications?) from pubmeds API.

Specifies author’s name and pulls all publications from pubmed (first, middle, or last author).

Then pull the articles that cite the specified author.

Next, for each article that cites specified author, pull all the citation’s authors.

Finally, pull all affiliation information for the citation’s authors.

Data wrangling, analysis

A country was only counted once per manuscript (eg. if 8 authors were from 8 different institutions in Spain, the country tally was 1 for Spain).

A manuscript can have multiple countries (eg. a citation manuscript had 3 authors from USA, 2 from China, and 2 from Uganda, the country tally was 1 USA, 1 China, 1 Uganda).

Results

We selected a sampling of neurosurgeons from different specialties, at different stages of their careers, and with varying levels of involvement in global neurosurgery. Dr(s). Warf, Park, and Haglund are heavily involved in global neurosurgery. Of note, these definitions do not account for outlier publications.

GII - The n number of citations with at least n cross border citations

Summary of NSGY Global Publication Data
	author	Pubs	citations	CBC	CBC_perc	countries	H_index	GII	GII_HIC	GII_MIC	GII_LIC	HIC	MIC	LIC
2	Lawton	469	4243	2875	0.6775866	88	93	25	20	13	2	5895	1460	48
3	Haglund	99	1021	620	0.6072478	90	46	15	12	6	8	1481	259	204
4	Fecci	66	2263	1461	0.6456032	66	34	17	15	10	1	3038	680	7
5	Mirzadeh	35	1892	1117	0.5903805	59	NA	15	15	11	0	2852	319	0
6	Park	363	2269	1905	0.8395769	105	22	18	15	10	5	2756	1222	241
8	Warf	81	622	449	0.7218650	99	39	15	11	8	7	1165	367	241
9	Shaffrey	401	3206	2308	0.7199002	73	96	28	23	14	2	6055	1439	62

Heat map of cross boarder citationa

Figure 6. A choropleth map of Dr. Lawton’s citations excluding home country

Faculty citations by country

Figure x. Bar plot of cross border citations

Additional figures