Search (1 results, page 1 of 1)

  • × author_ss:"Rao, I.K."
  • × year_i:[1970 TO 1980}
  1. Rao, I.K.: ¬The distribution of scientific productivity and social change (1978) 0.01
    0.011039805 = product of:
      0.02207961 = sum of:
        0.02207961 = product of:
          0.04415922 = sum of:
            0.04415922 = weight(_text_:r in 8) [ClassicSimilarity], result of:
              0.04415922 = score(doc=8,freq=2.0), product of:
                0.15092614 = queryWeight, product of:
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.045593463 = queryNorm
                0.29258826 = fieldWeight in 8, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.3102584 = idf(docFreq=4387, maxDocs=44218)
                  0.0625 = fieldNorm(doc=8)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    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