Estimation of Zipf parameters

Nicholls, Paul

doi:10.1002/(sici)1097-4571(198711)38:6<443::aid-asi4>3.0.co;2-e

Cited by 30 publications

(17 citation statements)

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“…For the parameter estimations for this and all subsequent distributions (excepting Table 2) we proceeded according to the method of (linear) truncated least squares*, and performed the Kolmogoroff-Smirnov goodness-of-fit test with positive results on a 0.01 level of significance and one negative result. In our opinion, this test has no systematic value, *In more than four fifths of the thirty-four cases examined by Nicholls [17] this method yields good fits; hence, for the purpose of our comparative analysis, it will suffice. however, for the corroboration of the Lotka law and is only a useful convention to describe the agreement between two sets of a certain kind of frequency data.…”

Section: An Example Of a Lotka Distribution With Equality Of Chances mentioning

confidence: 98%

The Dependence of Lotka's Law on the Selection of Time Periods in the Development of Scientific Areas and Authors

Wagner-Döbler¹,

Berg²

1995

Journal of Documentation

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If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation.

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Section: An Example Of a Lotka Distribution With Equality Of Chances mentioning

confidence: 98%

The Dependence of Lotka's Law on the Selection of Time Periods in the Development of Scientific Areas and Authors

Wagner-Döbler¹,

Berg²

1995

Journal of Documentation

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“…Nicholls (1987) and later Goldstein et al (2004) show that other standard fitting methods, such as nonlinear regression or continuous fits of histograms plotted on double-logarithmic scales, produce systematically biased estimates and often lead to incorrect conclusions.…”

Section: Estimation Of the Network Parameter γmentioning

confidence: 99%

The Heckscher–Ohlin model and the network structure of international trade

Baskaran¹,

Blöchl²,

Brück³

et al. 2011

International Review of Economics & Finance

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This paper estimates for 28 product groups a characteristic parameter that reflects the topological structure of its trading network. Using these estimates, it then describes how the structure of international trade has evolved during during the 1980-2000 period. Thereafter, it demonstrates the importance of networks in international trade by explicitly accounting for their scaling properties when testing the prediction of the Heckscher-Ohlin model that factor endowment differentials determine bilateral trade flows. The results suggest that differences in factor endowments increase bilateral trade in goods that are traded in "dispersed" networks. For goods that are traded in "concentrated" networks, factor endowment differentials are less important.

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“…For k, there is a priori assumption again, using the sample proportion g(l), linear least squares, Riemann series, and finite series. Estimation criteria are discussed by Nicholls (1987aNicholls ( , 1987b, Tague and Nicholls (1987), Haitun (1982), and Yablonsky (1985).…”

Section: Estimation and Testingmentioning

confidence: 99%

Bibliometric modeling processes and the empirical validity of Lotka's Law

Nicholls

1989

J. Am. Soc. Inf. Sci.

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A considerable literature exists on the empirical validity of Lotka's law; however, these studies are mainly incomparable and inconclusive, owing to substantial differences in the analytical methods applied. The main elements involved in fitting a bibliometric model to empirical data are: specification of the model, measurement of the variables, organization of the data, parameter estimation, and assessing goodness-of-fit. Each of these modeling variables is examined, a consistent methodology for applying Lotka's law is proposed, and the results of an empirical test are described. These results support the empirical validity and generality of Lotka's law as well as the suitability of the proposed methodology.

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Estimation of Zipf parameters

Cited by 30 publications

References 0 publications

The Dependence of Lotka's Law on the Selection of Time Periods in the Development of Scientific Areas and Authors

The Dependence of Lotka's Law on the Selection of Time Periods in the Development of Scientific Areas and Authors

The Heckscher–Ohlin model and the network structure of international trade

Bibliometric modeling processes and the empirical validity of Lotka's Law

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