Rao, I.K.: ¬The distribution of scientific productivity and social change (1978)
0.01
0.014458065 = product of:
0.07229032 = sum of:
0.05973887 = weight(_text_:wide in 8) [ClassicSimilarity], result of:
0.05973887 = score(doc=8,freq=2.0), product of:
0.15254007 = queryWeight, product of:
4.4307585 = idf(docFreq=1430, maxDocs=44218)
0.03442753 = queryNorm
0.3916274 = fieldWeight in 8, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.4307585 = idf(docFreq=1430, maxDocs=44218)
0.0625 = fieldNorm(doc=8)
0.012551456 = product of:
0.037654366 = sum of:
0.037654366 = weight(_text_:29 in 8) [ClassicSimilarity], result of:
0.037654366 = score(doc=8,freq=2.0), product of:
0.12110529 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.03442753 = queryNorm
0.31092256 = fieldWeight in 8, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0625 = fieldNorm(doc=8)
0.33333334 = coord(1/3)
0.2 = coord(2/10)
- Abstract
- Results in the literature concerning the probability that an author publishes r articles in time t are reexamined, and it is found that a negative binomial distribution bits scientific productivity data (by the chi-squared goodness-of-fit-test) better than many other distribution such as geometric, logarithmic, zeta, cumulative advantage, etc. It is shown analytically that the nagative binomial distribution describes a pattern of scientific productivity under the 'success-breeds-success' condition in a wide variety of social circumstances
- Source
- Journal of the American Society for Information Science. 29(1978), S.111-122