50 Journals with highest impact factor

Fields: Biochemical Research Methods, Biochemistry and Molecular Biology, Biology, Biophysics, Biotechnology and applied Microbiology
Years: 2000-2004
Region: USA

Country Average # Authors +/- % of Papers w/ 3 or more Authors % of Papers w/ 4 or more Authors % of Papers w/ 5 or more Authors # Papers

Nebraska 4.235 0.175 0.76 0.57 0.40 149

Arizona 4.332 0.302 0.74 0.61 0.37 220

Wisconsin 4.376 0.170 0.81 0.61 0.41 543

Vermont 4.403 0.259 0.83 0.61 0.42 72

New Hampshire 4.460 0.436 0.78 0.55 0.42 139

Oklahoma 4.464 0.265 0.85 0.62 0.39 151

Michigan 4.473 0.230 0.77 0.58 0.42 1080

Mississippi 4.482 0.277 0.76 0.59 0.44 85

New Mexico 4.527 0.570 0.76 0.63 0.45 91

Iowa 4.604 0.175 0.79 0.62 0.41 386

Colorado 4.614 0.159 0.83 0.65 0.44 469

Oregon 4.640 0.360 0.81 0.64 0.46 350

Missouri 4.681 0.258 0.83 0.59 0.41 229

Louisiana 4.704 0.209 0.84 0.66 0.49 250

New York 4.710 0.137 0.80 0.62 0.45 3298

Minnesota 4.718 0.182 0.82 0.62 0.45 522

South Carolina 4.734 0.387 0.81 0.65 0.48 184

North Carolina 4.750 0.114 0.82 0.65 0.48 1370

Georgia 4.765 0.368 0.82 0.64 0.47 469

Washington 4.805 0.148 0.81 0.63 0.48 1603

Delaware 4.809 0.489 0.87 0.63 0.49 68

Kentucky 4.812 0.238 0.86 0.69 0.52 213

Indiana 4.813 0.218 0.84 0.64 0.47 433

New Jersey 4.813 0.244 0.81 0.60 0.44 595

Idaho 4.830 0.609 0.83 0.62 0.47 53

Virginia 4.831 0.162 0.83 0.65 0.46 427

Utah 4.843 0.217 0.85 0.66 0.46 280

Connecticut 4.847 0.124 0.81 0.64 0.47 718

Tennessee 4.919 0.457 0.86 0.68 0.49 580

California 4.926 0.113 0.82 0.66 0.49 4963

Kansas 4.932 0.288 0.80 0.67 0.48 132

Illinois 4.990 0.214 0.83 0.68 0.51 1093

Florida 4.992 0.274 0.82 0.67 0.54 479

Ohio 5.030 0.183 0.86 0.69 0.49 1110

Alabama 5.058 0.287 0.85 0.69 0.50 309

Texas 5.059 0.209 0.86 0.70 0.52 2322

Rhode Island 5.068 0.342 0.82 0.70 0.56 88

Massachusetts 5.111 0.143 0.85 0.67 0.51 3206

Pennsylvania 5.188 0.152 0.85 0.70 0.55 1852

Arkansas 5.357 0.522 0.91 0.74 0.53 70

Maryland 5.362 0.183 0.87 0.71 0.55 2799

West Virginia 5.571 0.294 0.86 0.73 0.61 56

Maine 6.267 0.538 0.92 0.82 0.65 60

Country	Average # Authors	+/-	% of Papers w/ 3 or more Authors	% of Papers w/ 4 or more Authors	% of Papers w/ 5 or more Authors	# Papers
Nebraska	4.235	0.175	0.76	0.57	0.40	149
Arizona	4.332	0.302	0.74	0.61	0.37	220
Wisconsin	4.376	0.170	0.81	0.61	0.41	543
Vermont	4.403	0.259	0.83	0.61	0.42	72
New Hampshire	4.460	0.436	0.78	0.55	0.42	139
Oklahoma	4.464	0.265	0.85	0.62	0.39	151
Michigan	4.473	0.230	0.77	0.58	0.42	1080
Mississippi	4.482	0.277	0.76	0.59	0.44	85
New Mexico	4.527	0.570	0.76	0.63	0.45	91
Iowa	4.604	0.175	0.79	0.62	0.41	386
Colorado	4.614	0.159	0.83	0.65	0.44	469
Oregon	4.640	0.360	0.81	0.64	0.46	350
Missouri	4.681	0.258	0.83	0.59	0.41	229
Louisiana	4.704	0.209	0.84	0.66	0.49	250
New York	4.710	0.137	0.80	0.62	0.45	3298
Minnesota	4.718	0.182	0.82	0.62	0.45	522
South Carolina	4.734	0.387	0.81	0.65	0.48	184
North Carolina	4.750	0.114	0.82	0.65	0.48	1370
Georgia	4.765	0.368	0.82	0.64	0.47	469
Washington	4.805	0.148	0.81	0.63	0.48	1603
Delaware	4.809	0.489	0.87	0.63	0.49	68
Kentucky	4.812	0.238	0.86	0.69	0.52	213
Indiana	4.813	0.218	0.84	0.64	0.47	433
New Jersey	4.813	0.244	0.81	0.60	0.44	595
Idaho	4.830	0.609	0.83	0.62	0.47	53
Virginia	4.831	0.162	0.83	0.65	0.46	427
Utah	4.843	0.217	0.85	0.66	0.46	280
Connecticut	4.847	0.124	0.81	0.64	0.47	718
Tennessee	4.919	0.457	0.86	0.68	0.49	580
California	4.926	0.113	0.82	0.66	0.49	4963
Kansas	4.932	0.288	0.80	0.67	0.48	132
Illinois	4.990	0.214	0.83	0.68	0.51	1093
Florida	4.992	0.274	0.82	0.67	0.54	479
Ohio	5.030	0.183	0.86	0.69	0.49	1110
Alabama	5.058	0.287	0.85	0.69	0.50	309
Texas	5.059	0.209	0.86	0.70	0.52	2322
Rhode Island	5.068	0.342	0.82	0.70	0.56	88
Massachusetts	5.111	0.143	0.85	0.67	0.51	3206
Pennsylvania	5.188	0.152	0.85	0.70	0.55	1852
Arkansas	5.357	0.522	0.91	0.74	0.53	70
Maryland	5.362	0.183	0.87	0.71	0.55	2799
West Virginia	5.571	0.294	0.86	0.73	0.61	56
Maine	6.267	0.538	0.92	0.82	0.65	60